Family of slender threadlike aquatic plants, in the order CHARALES, phylum STREPTOPHYTA, that are closely related to LAND PLANTS.
A genus of green plants in the family CHARACEAE, phylum STREPTOPHYTA. They have a strong garlic-like odor and are an important food source for waterfowl.
The movement of CYTOPLASM within a CELL. It serves as an internal transport system for moving essential substances throughout the cell, and in single-celled organisms, such as the AMOEBA, it is responsible for the movement (CELL MOVEMENT) of the entire cell.
The field of biology which deals with the process of the growth and differentiation of an organism.
The study of the origin, structure, development, growth, function, genetics, and reproduction of plants.
Time period from 1901 through 2000 of the common era.
The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.
Time period from 1801 through 1900 of the common era.
The branch of science concerned with the means and consequences of transmission and generation of the components of biological inheritance. (Stedman, 26th ed)
A large supergroup of mostly amoeboid EUKARYOTES whose three main subgroups are CERCOZOA; FORAMINIFERA; and HAPLOSPORIDA. Nearly all of the species possess MITOCHONDRIA and historically many were considered ANIMALS.
Places for cultivation and harvesting of fish, particularly in sea waters. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A plant division. They are simple plants that lack vascular tissue and possess rudimentary rootlike organs (rhizoids). Like MOSSES, liverworts have alternation of generations between haploid gamete-bearing forms (gametophytes) and diploid spore-bearing forms (sporophytes).
The largest country in North America, comprising 10 provinces and three territories. Its capital is Ottawa.
One of the three domains of life (the others being BACTERIA and ARCHAEA), also called Eukarya. These are organisms whose cells are enclosed in membranes and possess a nucleus. They comprise almost all multicellular and many unicellular organisms, and are traditionally divided into groups (sometimes called kingdoms) including ANIMALS; PLANTS; FUNGI; and various algae and other taxa that were previously part of the old kingdom Protista.
Infections with unicellular organisms formerly members of the subkingdom Protozoa.
A province of Canada lying between the provinces of Manitoba and Quebec. Its capital is Toronto. It takes its name from Lake Ontario which is said to represent the Iroquois oniatariio, beautiful lake. (From Webster's New Geographical Dictionary, 1988, p892 & Room, Brewer's Dictionary of Names, 1992, p391)
Inorganic compounds derived from hydrochloric acid that contain the Cl- ion.
An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
Electrodes which can be used to measure the concentration of particular ions in cells, tissues, or solutions.
A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.
The concentration of osmotically active particles in solution expressed in terms of osmoles of solute per liter of solution. Osmolality is expressed in terms of osmoles of solute per kilogram of solvent.
The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or ORGANELLES membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).
Nitric acid (HNO3). A colorless liquid that is used in the manufacture of inorganic and organic nitrates and nitro compounds for fertilizers, dye intermediates, explosives, and many different organic chemicals. Continued exposure to vapor may cause chronic bronchitis; chemical pneumonitis may occur. (From Merck Index, 11th ed)
The application of a caustic substance, a hot instrument, an electric current, or other agent to control bleeding while removing or destroying tissue.
Strong alkaline chemicals that destroy soft body tissues resulting in a deep, penetrating type of burn, in contrast to corrosives, that result in a more superficial type of damage via chemical means or inflammation. Caustics are usually hydroxides of light metals. SODIUM HYDROXIDE and potassium hydroxide are the most widely used caustic agents in industry. Medically, they have been used externally to remove diseased or dead tissues and destroy warts and small tumors. The accidental ingestion of products (household and industrial) containing caustic ingredients results in thousands of injuries per year.
A strong corrosive acid that is commonly used as a laboratory reagent. It is formed by dissolving hydrogen chloride in water. GASTRIC ACID is the hydrochloric acid component of GASTRIC JUICE.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
A short thick vein formed by union of the superior mesenteric vein and the splenic vein.
A gram-negative, rod-shaped to coccoid bacterium. It is the etiologic agent of SCRUB TYPHUS in humans and is transmitted by mites from rodent reservoirs.
Abnormal increase of resistance to blood flow within the hepatic PORTAL SYSTEM, frequently seen in LIVER CIRRHOSIS and conditions with obstruction of the PORTAL VEIN.
A system of vessels in which blood, after passing through one capillary bed, is conveyed through a second set of capillaries before it returns to the systemic circulation. It pertains especially to the hepatic portal system.
The study of natural phenomena by observation, measurement, and experimentation.
The venous pressure measured in the PORTAL VEIN.

Characterization of MADS-box genes in charophycean green algae and its implication for the evolution of MADS-box genes. (1/5)

The MADS-box genes of land plants are extensively diverged to form a superfamily and are important in various aspects of development including the specification of floral organs as homeotic selector genes. The closest relatives of land plants are the freshwater green algae charophyceans. To study the origin and evolution of land plant MADS-box genes, we characterized these genes in three charophycean green algae: the stonewort Chara globularis, the coleochaete Coleochaete scutata, and the desmid Closterium peracerosum-strigosum-littorale complex. Phylogenetic analyses suggested that MADS-box genes diverged extensively in the land plant lineage after the separation of charophyceans from land plants. The stonewort C. globularis mRNA was specifically detected in the oogonium and antheridium together with the egg and spermatozoid during their differentiation. The expression of the C. peracerosum-strigosum-littorale-complex gene increased when vegetative cells began to differentiate into gametangial cells and decreased after fertilization. These expression patterns suggest that the precursors of land plant MADS-box genes originally functioned in haploid reproductive cell differentiation and that the haploid MADS-box genes were recruited into a diploid generation during the evolution of land plants.  (+info)

The GapA/B gene duplication marks the origin of Streptophyta (charophytes and land plants). (2/5)

Independent evidence from morphological, ultrastructural, biochemical, and molecular data have shown that land plants originated from charophycean green algae. However, the branching order within charophytes is still unresolved, and contradictory phylogenies about, for example,the position of the unicellular green alga Mesostigma viride are difficult to reconcile. A comparison of nuclear-encoded Calvin cycle glyceraldehyde-3-phosphate dehydrogenases (GAPDH) indicates that a crucial duplication of the GapA gene occurred early in land plant evolution. The duplicate called GapB acquired a characteristic carboxy-terminal extension (CTE) from the general regulator of the Calvin cycle CP12. This CTE is responsible for thioredoxin-dependent light/dark regulation. In this work, we established GapA, GapB, and CP12 sequences from bryophytes, all orders of charophyte as well as chlorophyte green algae, and the glaucophyte Cyanophora paradoxa. Comprehensive phylogenetic analyses of all available plastid GAPDH sequences suggest that glaucophytes and green plants are sister lineages and support a positioning of Mesostigma basal to all charophycean algae. The exclusive presence of GapB in terrestrial plants, charophytes, and Mesostigma dates the GapA/B gene duplication to the common ancestor of Streptophyta. The conspicuously high degree of GapB sequence conservation suggests an important metabolic role of the newly gained regulatory function. Because the GapB-mediated protein aggregation most likely ensures the complete blockage of the Calvin cycle at night, we propose that this mechanism is also crucial for efficient starch mobilization. This innovation may be one prerequisite for the development of storage tissues in land plants.  (+info)

Caterpillar regurgitant induces pore formation in plant membranes. (3/5)

Formation of channel-like pores in a plant membrane was induced within seconds after application of an aqueous solution containing regurgitant of the insect larvae Spodoptera littoralis. Gated pore currents recorded on the tonoplast of the Charophyte Chara corallina displayed conductances up to several hundred pS. A voltage-dependent gating reaction supports the assumption that pore-forming molecules have amphipathic properties. Regurgitant samples separated into masses smaller or larger than 3kDa were evaluated by patch-clamp and mass spectroscopy. Fractions containing peptides larger than 3kDa constituted pores of large conductances, peptides smaller than 3kDa constituted pores of small conductances. Peptide-free eluates did not constitute conducting pores, indicating that pore-forming components in regurgitant are membrane-spanning oligopeptides.  (+info)

Microfossils in micrites from Serra da Bodoquena (MS), Brazil: taxonomy and paleoenvironmental implications. (4/5)

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Exogenous melatonin affects photosynthesis in characeae Chara australis. (5/5)

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The reservoir is located in the cerrado (savannah) ecosystem, which in all occupies some two million km2 of Brazils territory. The Brazilian cerrado is occupied by an extensive plateau, between 300 and 600m high, extending into the States of Amazonas, Rondônia, Pará, Maranhão, Piauí, Tocantins, Goiás, Mato Grosso, Mato Grosso do Sul, Bahia, Minas Gerais, and São Paulo and the Federal District.. This region features abundant metamorphic rock from the lower Proterozoic period and major natural deposits of asbestos in the municipality of Minaçu and nickel in the municipalities of Niquelândia and Barro Alto. Small granite outcroppings in the shape of residual peaks are occasionally observed. The Serra da Mesa Dam was built on the Goiano plateau consisting of a dome called the Granito Serra da Mesa and circled by deformed metamorphic rocks (e.g., paragneiss, quartzite, and micaschist).. The regions vegetation, influenced by the Serra da Mesa Reservoir, consists of sparse and relatively ...
Wood, R.D. & Imahori, K. (1965). A revision of the Characeae. First Part. Monograph of the Characeae. pp. i-xxiv, 1-904. Weinheim: Verlag von J.Cramer.. Created: 02 May 2010 by Anders Langangen. Verified by: 29 September 2019 by M.D. Guiry. Accesses: This record has been accessed by users 290 times since it was created.. Verification of data ...
Trouvez tous les livres de Leshem, Yaacov Y.; Leshem, Y. y. - Plant Membranes: A Biophysical Approach to Structure, Development and Senescence. Sur eurolivre.fr,vous pouvez commander des livres anciens et neufs.COMPARER ET acheter IMMÉDIATEMENT au meilleur prix. 0792313534
Plant membrane compartments and trafficking pathways are highly complex, and are often distinct from those of animals and fungi. Progress has been made in defining trafficking in plants using transient expression systems. However, many processes require a precise understanding of plant membrane traf …
In: Membrane transport in plants / ed. by Michael R. Blatt.- Oxford [u.a.] : Blackwell [u.a.], 2004.- XX, 372 S.- (Annual plant reviews ; 15).- ISBN 1-405-11803-2.- S. 279-293 ...
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One of the most important phases of plant evolution occurred approximately 460-480 million years ago when photosynthetic organisms developed the capacity to colonize land. This transition to harsh terrestrial conditions would have required the ability to resist new abiotic stresses, including desiccation and UV radiation, as well as the development of mechanisms to promote progeny dispersal. It is likely that polysaccharide and cuticular cell walls were essential for the transition to a terrestrial environment and yet the evolutionary origins of their biosynthesis are not well understood. In collaboration with Dr. William Willats (University of Copenhagen), Dr. David Domozych (Skidmore College). Dr. Jeffrey Doyle and Dr. Iben Sørensen (Cornell University), we are addressing the hypothesis that the origins of plant cell walls occurred during divergence within the Charophycean green algae (CGA), which represent the closest living relatives to land plants (embryophytes). Characterization of the ...
A brief investigation was made into whether the apparatus developed for characean cells could be applied to higher plants. A seedling of broccoli (Brassica oleracea var. bolrytis) was mounted on the apparatus shown in Fig. 6. Upon dropping the glass tubing onto the hypocotyl, a significant change in the electrical potential was induced, the amplitude of which increased with increase in H. (Fig. 10). Thus, this apparatus developed for internodal cells of Characeae is also useful for analysis of electrical responses of higher plants to mechanical stimuli.. ...
Augmented population headcounts at these sites coinciding with the timeframe when, down south, was the arriving of the Shulaveri and Berbers (imo), means most likely one thing: Run north from the incoming intimidating others and local populations had no option but to move northbound around the Serra da Estrela mountain range, keep running until you bump into the other huge Iberia River. The Douro River. There, where you cant cross is the Coa Valley where humans between 3500 BC and 2000 BC cluster (again *533). Works done in the last 50 years in the area clearly show this spurs of population increase at times. Whatever words one uses to characterize the events that englobes and defines Chalcolithic Portugal it cannot be applied there, even later periods of bell beaker, social complexity and so forth. Is not there. Ever. They were left to be, serenely has they were, because the bell beakers moved southbound the Serra da Estrela Mountain range, being that the reason why Madrid is south of Cuenca ...
Lab assignment in which students examine different types of microfossils and pick condont elements and foraminifera from sediments and then photograph their specimens using the SEM
Went to South Padre Island today, and this time, I wasnt there digging up the beach. Instead, I was there for a networking lunch at a little conference my buddy Mike (King Midas) Persans was hosting on plant membranes. While I had nothing to do with plant membranes, they had one of the program directors from the ...
Smith, J.R., 1985: The electrical properties of plant cell membranes iii. the effects of insulated regions upon the cable properties and measured membrane conductance of charophytes
This teaching and learning web-site is intended as an introduction to micropalaeontology. Micropalaeontology is the study of microfossils (any fossil generally less than 1mm in size). This page covers calcareous nannofossils.
African pygmy toads of the genus Poyntonophrynus are some of the least known species of African toads. The genus comprises ten recognized species endemic to sub-Saharan Africa, five of which are restricted to southwestern Africa. Recent field research in Angola provided new material for three species of Poyntonophrynus, including a morphologically distinctive population from the Serra da Neve Inselberg. Based on a combination of external morphology, high-resolution computed tomography scanning, and molecular phylogenetic analysis, the Serra da Neve population is described as new species that is nested within the genus. The most striking character that differentiates the newly described species from its congeners is the lack of a tympanic middle ear, a condition common in the family Bufonidae, but so far not known for Poyntonophrynus. The description of this new species from southwestern Angola reinforces the biogeographic importance of the region and further suggests that southwestern Africa is the
Coleochaete is a genus of parenchymatous charophyte green algae in the order Coleochaetales.[1] They are haploid, reproduce both sexually and asexually, and have true multicellular organisation, with plasmodesmata communicating between adjacent cells. The plants form flat, sprawling discs on solid surfaces in freshwater streams worldwide, usually as epiphytes on aquatic plants or growing on the surface of stones. They are seen as one of two most probable sister groups to land plant species,[2][3][4] the second candidate group being the Characeae. The issue is still not resolved.[4] As they show some of the earliest and simplest features of multicellular plant growth, they are ideal model organisms in the field of synthetic biology.[citation needed] They are easy to culture and techniques that have been used to study Arabidopsis thaliana are now being applied to Coleochaete.[5] Coleochaete has a sterile jacket of cells that surround the gametangia and zygotes that are protected by a layer of ...
The park was created to protect the prehistoric artifacts and paintings found there. It became a World Heritage Site in 1991. Its head archaeologist is Niède Guidon. Its best known archaeological site is Pedra Furada. Scientific studies confirm that the Capivara mountain range was densely populated in the pre-Columbian Era.[citation needed] A newer site is Toca da Tira Peia, where the stone tools found may date to as early as 22,000 years ago. The site has been dated through optically stimulated luminescence.[5] Other important archaeological sites in the area are Toca da Pena, Baxao da Esperanca, and Sitio do Meio. Lapa do Boquete site is located directly south.[6] ...
Hybridoma technology has been used successfully to generate monoclonal-antibody probes against protoplast membrane antigens. Hybridomas secreting monoclonal antibodies that either inhibit or stimulate a putative plasma-membrane marker enzyme, (K+ + Mg2+)-stimulated pH 6.5 ATPase, have been identified and cloned. The specificity of monoclonal-antibody probes on the activity of other phosphate-hydrolysing enzymes has also been examined. The production and identification of monospecific antibodies capable of immunoreacting with particular component proteins in a complex plant membrane mixture highlight the usefulness of hybridoma methodology for the enzymologist, especially since such monoclonal antibodies can be used in the purification of proteins by immunoaffinity techniques. ...
Abstract: O presente trabalho teve por objetivo estudar a biologia e distribui o de Imparfinis minutus na microbacia do Ribeir o Grande (22o47′08′′S, 45o28′17′′W), serra da Mantiqueira oriental, nos períodos de julho e outubro de 2001 e janeiro e abril de 2002. Dentre as 37 espécies amostradas, I. minutus (Siluriformes, Heptapteridae) distribuiu-se desde o pediplano, até a planície do Vale do Paraíba, e esteve associada a ambientes pouco profundos, com substrato constituído principalmente por pedra, cascalho e matac o. O comprimento total dos indivíduos na popula o variou de 4,75 a 12,75 cm. A curva ajustada da rela o peso-comprimento para a popula o foi p = 0,0052 C3,13. Os fatores de condi o alométrico (Ka) e relativo (Kr) apresentaram tendências semelhantes, mostrandose baixos em julho, atingindo valores mais altos em abril. Com respeito à rela ogonadossomática (RGS) de fêmeas, os valores foram mais elevados em outubro e janeiro, o que sugere que a atividade ...
uuid: ca196e1f-ec21-44dc-9b25-44a266cd84d5, type: records, etag: 1c5ea01705ec700c4ef4a1a1f2db40d8e636977a, data: { dwc:startDayOfYear: 60, dwc:specificEpithet: puttemansianum, dwc:recordedBy: A. Puttemans, dcterms:references: http://mycoportal.org/portal/collections/individual/index.php?occid=143829, dwc:scientificNameAuthorship: Henn., dwc:occurrenceID: 143829, dwc:stateProvince: São Paulo, dwc:eventDate: 1903-03-01, dwc:country: Brazil, idigbio:recordId: urn:uuid:fda2d0e2-1852-45c4-bd2e-2131454f4062, dwc:typeStatus: isotype, dwc:basisOfRecord: PreservedSpecimen, dwc:genus: Aecidium, dwc:family: Uredinales incertae sedis, symbiota:verbatimScientificName: Aecidium puttemansianum, dwc:rights: http://creativecommons.org/licenses/by-nc-sa/3.0/, dwc:locality: Serra da Cantareira, dwc:institutionCode: NY, dwc:catalogNumber: 00611323, dwc:month: 3, dwc:recordNumber: 676, dcterms:modified: 2014-01-20 ...
Conservation groups in Portugal have set up education programmes to try and reverse traditional intolerance to wolves among agricultural communities, and are working to increase the use of livestock guarding dogs - there are two traditional Portuguese breeds, the Castro Labroreiro and the Serra da Estrela - to protect flocks from wolves ...
Recent lines of evidence, including 40Ar/39Ar ages (Kowallis et al., 1998), magnetostratigraphy (Steiner, 1998), spores and pollen (Litwin et al., 1998), and charophytes and ostracods (Schudack et al, 1998), agree the Morrison Formation is predominantly of Kimmeridgian age, although the lowermost units may be latest Oxfordian and the uppermost earliest Tithonian. [Multiple sources for different data in the same sentence ...
books.google.comhttps://books.google.com/books/about/Aspects_of_Palynology.html?id=Kr6zAAAAIAAJ&utm_source=gb-gplus-shareAspects of Palynology ...
FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a lipase that hydrolyzes galactolipids, the main components of plant membrane lipids. An allelic polymorphism in this gene results in both coding and non-coding variants; the reference genome represents the non-coding allele. [provided by RefSeq, Aug 2015 ...
FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a lipase that hydrolyzes galactolipids, the main components of plant membrane lipids. An allelic polymorphism in this gene results in both coding and non-coding variants; the reference genome represents the non-coding allele. [provided by RefSeq, Aug 2015 ...
Scientists claim that a new analysis of ancient rocks all but confirms that 3.4-billion-year-old microfossils contained some of Earths earliest life-forms.
Cultural geology in my eye is the interface of geology and human culture, Joe Hannibal said.. Joe Hannibal is curator of invertebrate paleontology at the Cleveland Museum of Natural History. Hes a fossil expert, but hes also used his fossil and rock identification skills to track the movements of cultural materials.. When the Euro-Americans came into different parts of the country, they would first establish mills. Well, a lot of those mills have then burned down, Hannibal said. But millstones, well, theyre made out of stone.. Hannibal was examining some historic millstones in Ohio when he noticed they contained tiny spheres of fossilized algae, called charophytes.. So I wrote in my notebook, charophyte? and came back and realized, oh my galoshes, these are charophytes and they must mean something and theyre telling me something, Hannibal said. Both Ohioans and Europeans made millstones out of a type of stone called chert, but only millstones from the Paris Basin contained ...
Oncotarget. 2017 Nov 21;8(59):100582-100592 Authors: Zhu C, Xu Y, Duan Y, Li W, Zhang L, Huang Y, Zhao W, Wang Y, Li J, Feng T, Li X, Hu X, Yin W ...
The fossilized dinoflagellate cysts that are found in rock deep beneath the Earths surface only measure about the size of a tiny pencil dot, but they tell paleontologist Lucy Edwards a lot about our groundwater.. Edwards, an AAAS fellow who works for the U.S. Geological Survey (USGS) in Reston, Va., has studied the microfossil algae cysts-the empty shells left over from one life cycle stage of the dinoflagellate-since working on her Ph.D. thesis in the mid-1970s.. Most paleontologists study the organism for a reason. The reason for me had always been biostatigraphy-using fossils to tell the age of the rock, and using the age of the rock to make predictions about the history of the rock to help find oil, water, or salt, Edwards says.. Working as a paleontologist for USGS means constantly uncovering secrets under the Earths surface. You can never get bored here and you can never run out of material, she says.. Thats why shes been at her job for more than three decades. I tell people Im ...
Analyses of morphological and ultrastructural characters, and also of the information carried by gene sequences have established that green algae belonging to the class Charophyceae gave rise to the more than 500,000 land plant species currently inhabiting our planet [1, 2]. Charophycean green algae and land plants form the green plant lineage Streptophyta [3], whereas most, if not all, of the other extant green algae belong to the sister lineage Chlorophyta [2]. In contrast to the large diversity of land plants, only a few thousands charophycean species are living today. Six monophyletic groups are currently recognized in the Charophyceae: the Mesostigmatales [4] represented by Mesostigma viride, a scaly biflagellate that has long been thought to be a member of the Prasinophyceae (the earliest-diverging lineage of the Chlorophyta) [5]; the Chlorokybales represented as well by a single species (Chlorokybus atmophyticus); the Klebsormidiales (3 genera, 45 spp.); the Zygnematales (~ 50 genera, ~ ...
The upper Peechee Member of the Ancient Wall reef complex that is well exposed on the southeast margin of Mount Haultain represents the end of the first main depositional cycle of this complex. The uppermost part forms a 15-30 m thick carbonate sequence that extends basinward over deeper water fore-reef detritus and is divisible into three distinct layers: the lower two consist mainly of stromatoropoid and coral bioherms and biostromes and associated calcarenites and calcilutites; the uppermost consists of five small micrite and wackestone bioherms 7.5-22 m long and 4-6 m high; three of these grew around and on top of a 30 m wide stromatoporoid-coral biostrome. Frame-building organisms include laminar and hemispherical colonies of Phillip-sastrea, renalcid algae (often associated with small fenestral cavities), encrusting calcareous algae (Sphaerocodium), and laminar stromatoporoids. Renalcid encrustations of micrites and wackestones on the vertical sides and undersides of bioherms indicate that ...
Necrosis and ethylene-inducing peptide 1 (Nep1)-like proteins (NLPs) are secreted by several phytopathogenic micro-organisms. They trigger leaf necrosis and immunity-associated responses in various dicotyledonous plants. We identified glycosylinositol phosphorylceramides (GIPC), a major class of plant sphingolipids, as target molecules for NLP binding to plasma membranes. X-ray crystallography revealed that NLP forms complexes with terminal hexose moieties. NLP binding to GIPC head groups induces several conformational changes within the toxin that precedes membrane attachment and host cell lysis. This study unveils early steps of NLP cytolysin action and explains why dicot plants are NLP toxin-sensitive whereas monocot plants are not.
Introduction: Sleep as a widespread physiological phenomenon is seen in all vertebrates. In primates as human, the sleep consists of two components REM & non-R...
The Estrela Mountain Dog takes its name from the Serra da Estrela, a mountain range in mid Portugal. Because of its remote location, it is impossible to determine the origin of the breed, but it is believed to be one of the oldest breeds of the Iberian Peninsula. In the summer, shepherds moved the sheep up to the high mountain pastures where the Estrela Mountain Dog guarded the flocks. In the winter, when sheep were moved to the foot of the mountains, these same dogs guarded the shepherds households and occasionally served as draft animals. During the 1930s, Portugal underwent a revival of interest in their native breeds, and produced the first breed standard for the Estrela in 1933. The earliest dog as recorded by the American breed club was brought into the United States in 1998, although it is known that some were imported several years earlier. The Estrela Mountain Dog was recognized by United Kennel Club in 1996. ...
Researchers from Tubingen resolve how a plant steroid hormone makes plants grow. If one wants to better understand how plants grow, one must analyze the chemistry of life in its molecular detail. Michael Hothorn from the Friedrich-Miescher-Laboratory of the Max Planck Society in Tübingen and his team are doing just that. Their latest work now reveals that a plant membrane receptor requires a helper protein to sense a growth-promoting steroid hormone and to transduce this signal across the cell membrane.. Every cell is surrounded by a greasy cell membrane. Signals from other cells and from the environment must be sensed at the cell surface, transduced across this membrane and translated into a specific response inside the cell. All organisms have evolved membrane receptor proteins to get these complex tasks done, but plant membrane receptors look drastically different from the well-studied players in animals and bacteria. The plant steroid receptor BRI1, which can sense a small steroid hormone ...
Plant membranes are relatively permeable to K+ due to various selective K+ channels across the membrane. Basically, one distinguishes between low-affinity K+ channels and high-affinity channels. For the function of the low-affinity channels, the electrochemical difference between the cytosol and the outer medium (liquid in root or leaf apoplast) is of decisive importance. The K+ is imported into the cell for as long as the electrochemical potential in the cytosol is lower than in the outer solution. With the import of the positive charge (K+) the electrochemical potential increases (decrease of the negative charge of the cytosol) and finally attains that of the outer medium, equilibrium is attained, and there is no further driving force for the uptake of K+ (15). The negative charge of the cytosol is maintained by the activity of the plasmalemma H+ pump permanently excreting H+ from the cytosol into the apoplast and thus maintaining the high negative charge of the cytosol and building up an ...
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Metaphase chromosomes were analyzed in Aplastodiscus perviridis from the locations: Morro do Ferro (MG), Serra da Bocaina (SP), Botucatu (SP), and in Hyla albopunctata found at: Morro do Ferro, Botucatu, and Campinas (SP). A significant quantity of metaphases with structural alterations were found in the Morro do Ferro population. These alterations were classified as: decondensation, condensation, breaks, gaps, deletions and acentric fragments. Breaks, deletions and fragments were the most frequent alterations and a great number of these occurred near centromeric heterochromatin. The frequency of altered metaphases varied among individuals in all populations studied. The majority of the alterations can probably be attributed to the high level of natural radiation at Morro do Ferro ...
The paper concerns a microfauna of well-preserved radiolarians, foraminifers, and conodonts discovered in unusually large concretions occurring in black shale. The microfossils are recovered by dissolving pieces of the concretions in a diluted solution of formic acid. The assemblage is unusual because radiolarians of this age are very scarce and also because the microfossils occur in strata deposited on the near shore margin of the epicontinental interior sea present in Pennsylvanian time. Present day radiolarians are floating organisms that are found mostly in the upper part of the open ocean far from shore. Their tiny siliceous remains are very abundant in ocean bottom deposits at great depths. ...
Zdeno Chara leans toward joining Europe If you play fantasy sports, get breaking news and immerse yourself in the ultimate fan experience.
A frightening hit by Zdeno Chara put Montreals Max Pacioretty in the hospital, but the N.H.L. will not issue any further sanctions in the incident.
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One of my favorite books is A.de Saint Exuperys Little Prince. I often get reminded of this quote when talking about B&W photography: Here is my secret. It is very simple. It is only with the heart that one can see rightly; What is essential is invisible to the eye.. Once I have read that even Ansel Adams would had been an average Joe if he did not master light in his darkroom .. I disagreed a bit as if there was not a good basis to the exposure of his negatives in a first place, it would be difficult to achieve such depth to his images as much as he could try in darkroom … but what makes his work so spectacular is in my opinion Him …. … well here is where another big part of a successful B&W photography takes its place … as all you see with your eyes is not all there is (including the light) .. It is very important that one photographs with his/her heart or soul and looks within for the reflections of it deep inside the photographed subject (have you ever noticed how when shooting ...
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After Zdeno Chara flips Mark Scheifele stick in the air, Scheifele retrieves it and buries a feed from Patrik Laine for a power-play goal
Zehra Ayhan, Donatella Duraccio, Birgül Özcan, Okan Eştürk, Serra Nalçabasmaz, Clara Silvestre, Sossio Cimmino, Gülsüm Erol, Murat Altan and Bengisu Toplu. B034 ...
Characeae)". Phytotaxa. 226 (2): 199-200. doi:10.11646/phytotaxa.226.2.11. Bruno Granier; Dany Azar; Sibelle Maksoud; Raymond ...
Rhodophyceae, Phaeophyceae, Characeae. Verlag Friedriech von Zezschwitz. Guiry, M.D.; G.M. Guiry (2009). "AlgaeBase". World- ...
Rhodophyceae, Phaeophyceae, Characeae. Gera: Verlag Friedriech von Zezschwitz. pp. i-iv, 1-382, 122 (41 col.) pls. Bolton, John ...
Wood, R.D. (1972). "Characeae of Australia". Nova Hedwigia. 22: 1-120. Filson, R.B. (1978). "A Revision of The Genus Heterodea ...
... or Moss-like plants Musci Hepaticae Characeae 3. Aphyllae Lichenes Fungi Algae p. 5 3 Alliances Algales p. 8 Diatomaceae ... ... Characeae Fungales, Fungi p. 29 Hymenomycetes ... Physomycetes Lichenales, Lichens p. 45 Graphidaceae Collemaceae Parmeliaceae ...
on directional conditions involving juice flow in the cell of Characeae). 1853: Das Individuum der Pflanze in seinem Verhältnis ... African Characeae). 1867: "Conspectus systematicus Characearum europaearum". 1870: Neuere Untersuchungen über die Gattungen ...
Characeae Ordo V. Ulvaceae Ordo VI. Floridae Ordo VII. Fucaceae Classis II. Lichenes Sectio II. Hysterophyta Classis III. Fungi ...
Iwabuchi K, Kaneko T, Kikuyama M (2006). "Ionic mechanism of mechano-perception in Characeae". Plant Cell Physiol. 46 (11): ...
Siphonocladiales Family 1. Valoniaceae Family 2. Dasycladaceae Class 2. Charophyceae Order Charales Family Characeae Order 1. ...
xiv, 282, 'Characeae'. Ecological Biochemistry: Environmental and Interspecies Interactions Hoek, C. van den, Mann, D. G. & ...
Les Characées de Belgique, 1863 - Characeae native to Belgium. La nomenclature botanique au congrès international de botanique ...
It is frequently found in association with the charophyte Palaeonitella (Characeae); if the ecology of Palaeonitella resembled ...
He then published works on Euphorbiaceae, Characeae, Apocynaceae, mosses and fungi. His annotated catalog of lichens, published ...
... is a species of algae in the family Characeae. Nitella opace is a dioecious species very similar to Nitella ...
Flora of Derbyshire: Flowering Plants, Higher Cryptogams, Mosses and Hepatics, Characeae. London: Bemrose & Sons Ltd., 1903. ...
... is a genus of stoneworts belonging to the family Characeae. The species of this genus are found in Europe, ...
Characeae. London: Bemrose & Sons Ltd. Retrieved 17 June 2011. Painter, W. H. 1889 A contribution to the flora of Derbyshire, ...
... is a species of alga belonging to the family Characeae. It has cosmopolitan distribution. "Nitella ...
... is a species of stonewort belonging to the family Characeae. It is native to Europe and Northern America. " ...
... is a species of stonewort belonging to the family Characeae. It has cosmopolitan distribution. "Nitella ...
... is a species of stonewort belonging to the family Characeae. It is native to Europe. "Chara baltica Bruzelius". ...
... is a genus of charophyte green algae in the family Characeae. The species in the genus include: Nitella abyssinica A. ...
... is a species of stonewort belonging to the family Characeae. Its native range is Europe and Northern America. " ...
In sediments remnants of characeae, diatoms, ostracods and Ruppia have been found; today only one ostracod species persists in ...
... is a species of alga belonging to the family Characeae. It has almost cosmopolitan distribution. "Chara baueri A. ...
... is a genus of green algae belonging to the family Characeae. The genus was described in 1857 by Alexander Braun. The ...
... is a species of stonewort belonging to the family Characeae. It has almost cosmopolitan distribution. " ...
... is a species of stonewort belonging to the family Characeae. Synonym: Chara prolifera Ziz ex A.Braun, 1834 ...
... is a species of stonewort belonging to the family Characeae. Synonym: Chara syncarpa Thuillier (= basionym) " ...
Chara is a genus of charophyte green algae in the family Characeae. They are multicellular and superficially resemble land ...
The ultrastructural features of oospore wall ornamentation in the genus Tolypella were examined using scanning electron microscopy (SEM). The taxonomic relationships among several species were discussed on the basis of oospore ultrastructure and measurements. In the case of T. glomerata and T. nidifica, our results support the status of separate species. Close relationships and transitional forms may exist between T. nidifica and T. normaniana, and not only in oospore wall ornamentation. Oospores of T. hispanica exhibited the same distinct type of reticulate oospore wall as previously reported, but our results do not support the recognition of T. hispanica as a separate species. Ultrastructure of the oospore walls of T. prolifera and T. intricata was almost identical, suggesting that these species are closely related. We therefore reject previous suggestions that morphological characteristics of oospores as observed in SEM are sufficient for identification of individual species. Although ...
Rhodophyceae, Phaeophyceae, Characeae. Gera: Verlag Friedriech von Zezschwitz. pp. i-iv, 1-382, 122 (41 col.) pls.. ...
... of Characeae cells without inserting a microelectrode into the vacuole. Values of E_,vo, and R_m measured by this method are ... Open-vacuole method for measuring membrane potential and membrane resistance of Characeae cells. 元データ 日本植物生理学会 ... The Hydration-Induced Ca^ Release Is a General Phenomenon in Characeae Membrane Control of Cytoplasmic Streaming in Characean ... Potassium, sodium and Chloride in the protoplasm of characeae Mechanosensitive Ca^ Release from Intracellular Stores in Nitella ...
Characeae). Botanical Journal of The Linnean Society, 155 (4). pp. 467-476. ISSN 0024-4074 ...
Characeae)". Phytotaxa. 226 (2): 199-200. doi:10.11646/phytotaxa.226.2.11. Bruno Granier; Dany Azar; Sibelle Maksoud; Raymond ...
Rhodophyceae, Phaeophyceae, Characeae. Verlag Friedriech von Zezschwitz. Guiry, M.D.; G.M. Guiry (2009). "AlgaeBase". World- ...
1965) Monograph of the Characeae. First part of a revision of the Characeae. Verlag von J. Cramer, Weinheim. ... McCourt, R. M., Karol, K. G., Guerlesquin, M., and Feist, M. (1996) Phylogeny of extant genera in the family Characeae ( ... Six living genera in a single family, the Characeae are known. Chara and Nitella contain the most species. Conventional ...
Wailes, G.H. (1937). Canadian Pacific fauna: 1. Protozoa. 1a. Lobosa; lb. Reticulosa; 1c. Heliozoa; 1d. Radiolaria. pp. 1-14. Toronto: Univ. Toronto Press, Fisheries Research Board of Canada. Wailes, G.H. (1939). Canadian Pacific fauna. 1. Protozoa. 1e. Mastigophora. pp. 1-45, Fig. 138. Toronto: Univ. Toronto Press, Fisheries Research Board of Canada. Wailes, G.H. (1943). Canadian Pacific fauna: 1. Protozoa. 1f. Ciliata; 1g. Suctoria. pp. 1-46. Toronto: Univ. Toronto Press, Fisheries Research Board of Canada. Protozoa ...
Characeae. Warming (1884)[edit]. Warming, E., 1884. Haandbog i den systematiske botanik. Anden gjennemsete udgave. 2nd ed. ...
Created: 13 February 2018 by Salvador Valenzuela Miranda. Verified by: 13 February 2018 by Salvador Valenzuela Miranda. Accesses: This record has been accessed by users 58 times since it was created.. Verification of data ...
Published in: Wood, R.D. (1965). A revision of the Characeae. First Part. Monograph of the Characeae. pp. i-xxiv, 1-904. ...
No distributional records for this taxon have been recorded by AlgaeBase to date. Generally, recent national lists or extensive regional or state lists have been employed to give a general indication of distribution.. Created: 30 April 2002 by M.D. Guiry. Verified by: 01 January 2011 by Anders Langangen. Accesses: This record has been accessed by users 386 times since it was created.. Verification of data ...
Stonewort, Brittlewort, Muskgrass Family: Characeae Scientific Name: Chara sp. Habit: Small malodorous aquatic plants lacking ...
Review of the species concepts Chara fibrosa and C. flaccida (Characeae, Charophyceae). Austral. Syst. Botany. 26(4): 291-297, ... Lamprothamnium in Australia (Characeae, Charophyceae). Austral. Syst. Botany. 26(4): 268-290, 13 figs.. 8 species described; ...
PART 1.MOSSES, HEPATICAE, LICHENS, CHARACEAE AND ALGAE. IN J. E. SMITH. 5(1):1-432. ENGLISH FLORA. LONDON. - ...
Nordstedt Braun in MUller Caledonia Central Plateau Chara fibrosa Chara fragilis Characeae species Charophyta cm high cm long ... J. Cramer in der Gebr der Borntraeger Verlagsbuchhandlung, 1995 - Characeae - 50 pages ... Australia South Esk River spec spine-cells Sterile branchlets Stipulodes stout striae Stuart subtilissima Tasmanian Characeae ...
50782 specimens found in the database ...
Collaborative Research: Phylogeny and Systematics of the Characeae (Charales). Co-PI with Dr. Kenneth Karol, New York Botanical ... Phylogenetic congruence of ribosomal operon and plastid gene sequences for the Characeae with an emphasis on Tolypella ( ... Characeae, Charophyceae). Phycologia 56:230-237.. *2016. McCourt, R. M., Karol, K. G., Hall, J. D., Casanova, M., T., Grant, M ...
Potassium, sodium and chloride in the protoplasm of characeae.Plant Cell Physiol. 15:103-110Google Scholar ...
order Characeae. Four species have been described as inhabiting Great Britain. They are found in pools and rivulets. Nitency ( ...
topic,Characeae,/topic,. ,/subject,. ,subject,. ,genre,Correspondence,/genre,. ,/subject,. ,subject,. ,topic,Engelmann, George ... KW - Characeae KW - Correspondence KW - Engelmann, George J KW - Engelmann, George, KW - Equisetaceae KW - Equisetum KW - ... KW - Characeae KW - Correspondence KW - Engelmann, George J KW - Engelmann, George, KW - Equisetaceae KW - Equisetum KW - ... KW - Characeae KW - Correspondence KW - Engelmann, George J KW - Engelmann, George, KW - Equisetaceae KW - Equisetum KW - ...
Beih.110: Raam, Joop C. van: The Characeae of Tasmania. 1995. 80 p., 30 figs., ,ISBN 3-443-51032-9, paperback DM 48./ $29 ...
Family Characeae. Chara sp.. Class Pinopsida (conifers). Order Pinales. Family Pinaceae. Pinus muricata Don (bishop pine). ...
bifurcata (Charales, Characeae) from Japan Hidetoshi Sakayama, Atsushi Kai, Mio Nishiyama, Makoto M. Watanabe, Syou Kato, ...
9). Mixed picture elements contain more than a single class, e.g., Characeae and bottom sediment. Differentiation of submerged ... The result contains main bottom cover classes of submerged growing macrophytes (Characeae) in green, emerged macrophytes (here ...
Characeae egg fragment. Cha.e. #. Müller, H H. Counting, palynology. 101. Dinoflagellate cyst indeterminata. Dinofl indet. #. ...
2016 - Robin Sleith. In Characeae: "Everything is everywhere, but the environment selects". ...
  • Stonewort, Brittlewort, Muskgrass Family: Characeae Scientific Name: Chara sp. (jhu.edu)
  • Particularly, marine algae of Chara genus (family: Characeae- charophyte green algae) reported to possess and antioxidant enzyme, allelophatic activities and lipid peroxidation capabilities along with high levels of photosynthetic pigment content[ 11 ]. (ijpsonline.com)
  • Levantamento florístico das Characeae (Chlorophyta) de Mato Grosso e Mato Grosso do Sul, Brasil: Chara. (ucr.ac.cr)
  • New records of Chara (Chlorophyta, Characeae) for subtropical southern Brazil. (ucr.ac.cr)
  • Collaborative Research: Phylogeny and Systematics of the Characeae (Charales). (drexel.edu)
  • The experiments are performed on giant-celled algae Characeae (single cells are up to 1 mm in diameter and several cm in length), which allow extensive manipulation, such as perfusion of the cell contents with artificial solutions, removal of vacuole or permeabilization of the outer cell membrane. (edu.au)
  • and membrane resistance (R_m) of Characeae cells without inserting a microelectrode into the vacuole. (chat-shuffle.net)
  • Radio-frequency bioeffects at the membrane level: Separation of thermal and athermal contributions in the characeae. (emf-portal.org)
  • First part of a revision of the Characeae. (tolweb.org)
  • Working from first principles, we propose a robust model of streaming emergence that combines motor dynamics with both microscopic and macroscopic hydrodynamics to explain how several independent processes, each ineffectual on its own, can reinforce to ultimately develop the patterns of streaming observed in the Characeae and other streaming species. (pnas.org)
  • Six living genera in a single family, the Characeae are known. (tolweb.org)
  • Thus, this apparatus developed for internodal cells of Characeae is also useful for analysis of electrical responses of higher plants to mechanical stimuli. (stackexchange.com)