Chlorophyta
A phylum of photosynthetic EUKARYOTA bearing double membrane-bound plastids containing chlorophyll a and b. They comprise the classical green algae, and represent over 7000 species that live in a variety of primarily aquatic habitats. Only about ten percent are marine species, most live in freshwater.
Crassulaceae
Aloe
Ammonium Hydroxide
Cyanobacteria
A phylum of oxygenic photosynthetic bacteria comprised of unicellular to multicellular bacteria possessing CHLOROPHYLL a and carrying out oxygenic PHOTOSYNTHESIS. Cyanobacteria are the only known organisms capable of fixing both CARBON DIOXIDE (in the presence of light) and NITROGEN. Cell morphology can include nitrogen-fixing heterocysts and/or resting cells called akinetes. Formerly called blue-green algae, cyanobacteria were traditionally treated as ALGAE.
Classification of loops of lampbrush chromosomes according to the arrangement of transcriptional complexes. (1/41)
The arrangement of transcriptional units in the loops of lampbrush chromosomes from oocyte nuclei of urodele amphibia and from primary nuclei of the green alga Acetabularia have been studied in the electron microscope using spread preparations. Loops with different patterns of arrangement of matrix units (i.e. to a first approximation, transcriptional units) can be distinguished: (i) loops consisting of one active transcriptional unit; (ii) loops containing one active transcriptional unit plus additional fibril-free, i.e. apparently untranscribed, intercepts that may include 'spacer' regions; (iii) loops containing two or more transcriptional units arranged in identical or changing polarities, with or without interspersed apparent spacer regions. Morphological details of the transcriptional complexes are described. The observations are not compatible with the concept that one loop reflects one and only one transcriptional unit but, rather, lead to a classification of loop types according to the arrangement of their transcriptional units. We propose that the lampbrush chromosome loop can represent a unit for the coordinate transcription of either one gene or a set of several (different) genes. (+info)Temperature dependence of cycloheximide-sensitive phase of circadian cycle in Acetabularia mediterranea. (2/41)
The biochemical nature of the circadian regulatory system that controls many cellular activities is still unclear. Recent results obtained from the application of protein synthesis inhibitors to individual Acetabularia cells expressing circadian rhythms of photosynthesis indicate that some protein(s) must be synthesized on 80S ribosomes during a discrete part of each cycle to insure correct time-keeping. A comparative study of the effects of brief cycloheximide treatments on cells investigated at different temperature has revealed that the phase of cycloheximide sensitivity is 4-6 hr longer and occurs about 8 hr later in the cycle when cells are kept at 20 degrees rather than 25 degrees. Temperature is known to influence the function of the circadian regulatory system in Acetabularia, but the effect on frequency is small (Q10 approximately equal to 0.8) due to the existence of a temperature-compensating feature. The large effects of temperature observed here thus favor the interpretation that protein synthesis on 80S ribosomes, while providing an essential component of the circadian timing mechanism, does not itself generate the period of the photosynthesis rhythm. (+info)Whorl morphogenesis in the dasycladalean algae: the pattern formation viewpoint. (3/41)
The dasycladalean algae produce diverse whorled structures, among which the best known are the vegetative and reproductive whorls of Acetabularia acetabulum. In this paper, we review the literature pertaining to the origin of these structures. The question is addressed in terms of the necessary pattern-forming events and the possible mechanisms involved, an outlook we call the pattern formation viewpoint. The pattern-forming events involved in the morphogenesis of the vegetative and reproductive whorls of Acetabularia have been used to define five and six morphogenetic stages, respectively. We discuss three published mechanisms which account, at least in part, for the pattern-forming events. The mechanisms are mechanical buckling of the cell wall, reaction-diffusion of morphogen molecules along the cell membrane, and mechanochemical interactions between Ca2+ ions and the cytoskeleton in the cytosol. The numerous differences between these mechanisms provide experimental grounds to test their validity. To date, the results of these experiments point towards reaction diffusion as the most likely patterning mechanism. Finally, we consider the evolutionary origin of the vegetative and reproductive whorls and provide mechanistic explanations for some of the major evolutionary advances. (+info)Cytoplasmic induction of changes in the ultrastructure of the Acetabularia nucleus and perinuclear cytoplasm. (4/41)
The ultrasturcture of the cell nucleus and perinuclear cytoplasm in Acetabularia is quite different in young and old cells. When a nucleus of an old cell was implanted into the cytoplasm of a young cell the nucleus assumed the morphology typical of a young cell within less than 10 days. The cytoplasm of an old cell was able to induce the reverse change in an implanted nucleus from a young cell. This cytoplasmic induction of nuclear ageing appeared to proceed more rapidly than rejuvenation. (+info)Asymmetric subcellular mRNA distribution correlates with carbonic anhydrase activity in Acetabularia acetabulum. (5/41)
The unicellular green macroalga Acetabularia acetabulum L. Silva is an excellent system for studying regional differentiation within a single cell. In late adults, physiologically mediated extracellular alkalinity varies along the long axis of the alga with extracellular pH more alkaline along the apical and middle regions of the stalk than at and near the rhizoid. Respiration also varies with greater respiration at and near the rhizoid than along the stalk. We hypothesized that the apical and middle regions of the stalk require greater carbonic anhydrase (CA) activity to facilitate inorganic carbon uptake for photosynthesis. Treatment of algae with the CA inhibitors acetazolamide and ethoxyzolamide decreased photosynthetic oxygen evolution along the stalk but not at the rhizoid, indicating that CA facilitates inorganic carbon uptake in the apical portions of the alga. To examine the distribution of enzymatic activity within the alga, individuals were dissected into apical, middle, and basal tissue pools and assayed for both total and external CA activity. CA activity was greatest in the apical portions. We cloned two CA genes (AaCA1 and AaCA2). Northern analysis demonstrated that both genes are expressed throughout much of the life cycle of A. acetabulum. AaCA1 mRNA first appears in early adults. AaCA2 mRNA appears in juveniles. The AaCA1 and AaCA2 mRNAs are distributed asymmetrically in late adults with highest levels of each in the apical portion of the alga. mRNA localization and enzyme activity patterns correlate for AaCA1 and AaCA2, indicating that mRNA localization is one mechanism underlying regional differentiation in A. acetabulum. (+info)The circadian rhythm in photosynthesis in Acetabularia in the presence of actinomycin D, puromycin, and chloramphenicol. (6/41)
Anucleate Acetabularia crenulata shows a circadian rhythm in photosynthesis. In this study, an oxygen electrode was employed to measure this photosynthetic rhythm in the presence and absence of the inhibitors, actinomycin D, chloramphenicol, and puromycin. High concentrations of the inhibitors were used: actinomycin D, 20-40 micrograms ml-1; puromycin, 30 and 100 micrograms ml-1; and chloramphenicol, 250 micrograms ml-1. The effectiveness of these inhibitors on protein synthesis was also measured under the same conditions used for the determination of rhythmicity. In spite of large effects of all three inhibitors on the incorporation of 14C leucine, no effect on the period or the phase of the photosynthetic rhythm was observed. The higher concentration of puromycin and chloramphenicol produced toxic effects which were expressed as a reduction in the amount of photosynthesis, but rhythmicity was still apparent. After 3 or 4 days' exposure to actinomycin, Acetabularia became resistant to its effect. Recovery was also observed in the ability to incorporate leucine. The implications of these results for theories of the basic oscillator responsible for circadian rhythmicity are discussed. (+info)Growth of the nuclear envelope in the vegetative phase of the green alga Acetabularia. Evidence for assembly from membrane components synthesized in the cytoplasm. (7/41)
The primary nucleus of the green alga Acetabularia grows about 25,000-fold in volume while it is separated from the endoplasmic reticulum and the whole cytoplasm by a special paranuclear cisterna of a vacuolar labyrinthum system which shows only very few (two to six per square micrometer) and small (ca. 40-120 nm in diamter) fenestrations. The nuclear envelope does not bear polyribosomes, nor do they occur in the entire zone intermediate between the nuclear envelope and the paranuclear cisterna. It is suggested that this special form of nuclear envelope growth takes place by assembly from cytoplasmically synthesized proteins that are translocated across the paranuclear cisterna in a nonmembrane-structured form. (+info)Expression of V-ATPase proteolipid subunit of Acetabularia acetabulum in a VMA3-deficient strain of Saccharomyces cerevisiae and its complementation study. (8/41)
The function of the translation products of six different cDNAs for Acetabularia V-ATPase proteolipid subunit (AACEVAPD1 to AACEVAPD6) was examined using a Saccharomyces cerevisiae VMA3-deficient strain that lacked its own gene for one of the proteolipid subunits of V-ATPase. Expression of the cDNAs in the strain revealed that four cDNAs from the six complemented the proton transport activity into the vacuole, visualized by fluorescence microscopy. The vacuolar-membrane-enriched fractions from the four transformants showed cross-reactivity with antibodies against the subunits a and A of S. cerevisiae V-ATPase. Two translation products from the other two cDNAs were demonstrated not to be localized in vacuolar membranes, and thus could not complement the function of the VMA3-deficient strain. As the primary structures deduced from the former four cDNAs are similar but clearly different from those of the latter two, the latter two translation products may not be able to substitute for theVMA3 gene product. (+info)Improvement of reconstitution of the Cl<sup>-</sup>-translocating ATPase isolated from Acetabularia acetabulum into liposomes...
Acetabularia - Wikipedia
Coordination of cellular events that precede reproductive onset in Acetabularia acetabulum: evidence for a loop in...
Trypaflavin und Ribonucleinsäure. Untersucht an Mäusegeweben, Condylostoma spec. und Acetabularia mediterranea | SpringerLink
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WoRMS - World Register of Marine Species - Acetabularia myriospora A.B.Joly & Cordeiro-Marina, 1965
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Acetabulum
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Ciliate, dasycladacean and hexamita nuclear code
Dasycladaceae: Acetabularia, and Batophora. Diplomonadida: Hexamita inflata, Diplomonadida ATCC50330, and ATCC50380. List of ... 5-bisphosphate carboxylase/oxygenase of two species of Acetabularia and the occurrence of unusual codon usage". Molecular & ...
Timeline of the history of genetics
Mandoli, Dina F. (1998). What Ever Happened to Acetabularia? Bringing a Once-Classic Model System into the Age of Molecular ... 1930s-1950s: Joachim Hämmerling conducted experiments with Acetabularia in which he began to distinguish the contributions of ... pp.190 Hämmerling, J. (1953). "Nucleo-cytoplasmic Relationships in the Development of Acetabularia". International Review of ...
History of RNA biology
doi:10.1016/S0074-7696(08)61042-6. ISBN 978-0-12-364302-5. Mandoli, Dina F. (1998). What Ever Happened to Acetabularia? ... During the 1930s, Joachim Hämmerling conducted experiments with Acetabularia in which he began to distinguish the contributions ... Hämmerling, J. (1953). "Nucleo-cytoplasmic Relationships in the Development of Acetabularia". International Review of Cytology ...
List of marine aquarium plant species
ACETABULARIA SP. [43]. In: Marine Plants in the Aquarium [44] ANADYOMENE SP. [45]. In: Marine Plants in the Aquarium [46] ...
Beatrice M. Sweeney
She was able to collect a sample of Acetabularia, a green algae with the ability to survive for long periods without its ... Sweeney, Beatrice M.; Haxo, Francis T. (1961-10-27). "Persistence of a Photosynthetic Rhythm in Enucleated Acetabularia". ...
Joachim Hämmerling
Hämmerling began growing Acetabularia in laboratories in the 1930s. There he discovered that the plant had one cell and the ... Because of his work with Acetabularia, when a new species of the plant was discovered in the Pacific Ocean in the 1970s, it was ... In his experiments, he removed the nucleus from a specific species of Acetabularia called A. crenulata and grafted it onto the ... Then he began studying the roles of the nucleus and cytoplasm by experimenting with the Acetabularia. In 1938 while working at ...
Mirandornithes
Pars acetabularis of musculus iliotibialis lateralis absent. Pars caudalis of musculus caudofemoralis absent. Wing with 12 ...
Action potential
Mummert H, Gradmann D (December 1991). "Action potentials in Acetabularia: measurement and simulation of voltage-gated fluxes ... such as the cardiac action potential and the action potential in the single-cell alga Acetabularia, respectively. Although ...
Membrane potential
Mummert H, Gradmann D (1991). "Action potentials in Acetabularia: measurement and simulation of voltage-gated fluxes". Journal ...
Hoek, Mann and Jahns system
Acetabularia, Batophora, Dasycladus, Neomeris, Cymopolia) Class Trentepohliophyceae Order Trentepohliales (e.g., Trentepohlia, ...
Ulvophyceae
Other well-known members include Caulerpa, Codium, Acetabularia, Cladophora, Trentepohlia and Monostroma. The Ulvophytes are ...
List of Bohol flora and fauna
Ube kinampay - purple yam; Dioscorea alata Ube- yam; Dioscorea alata other cash crops Acetabularia ambáng Chlorella Codium ...
Tip growth
... occurs in algae (e.g., Acetabularia acetabulum), fungi (hyphae) and plants (e.g. root hairs and pollen tubes). Tip ...
Halimeda
This differentiates the genus from Acetabularia, which is another genus of green seaweed that is calcified. Halimeda is highly ...
Elysia timida
... feeds on the alga Acetabularia acetabulum in spring and summer, and on Padina pavonica in autumn. It is able to ... the photosynthetic ascoglossan Elysia timida and the chlorophycean Acetabularia acetabulum". Marine Biology. 112 (4): 677-682. ...
Cell engineering
Bonotto, S.; Kirchmann, R.; Manil, P. (1971-01-01). "Cell Engineering in Acetabularia: A Graft Method for Obtaining Large Cells ...
March 1901
The plant Acetabularia haemmerlingii, of the genus Acetabularia that he used in his experiments, is named in his honor. A rare ...
Cl-transporting ATPase
Ohhashi T, Katsu T, Ikeda M (1992). "Improvement of reconstitution of the Cl−-translocating ATPase isolated from Acetabularia ...
List of seaweeds and marine flowering plants of Australia (temperate waters)
Family Polyphysaceae Mermaid's cup Acetabularia calyculus Lamouroux (Tropical Australia south to Adelaide, South Australia, and ...
Largest organisms
The thallus of the unicellular mermaid's wineglass, Acetabularia, can grow to several inches (perhaps 0.1 to 0.2 m) in length. ...
Algae
In Systema Naturae, Linnaeus described the genera Volvox and Corallina, and a species of Acetabularia (as Madrepora), among the ...
Marie A. DiBerardino
Genomic potential-Acetabularia to mammals". Journal of Cellular Physiology. 173 (2): 119-123. doi:10.1002/(SICI)1097-4652( ...
Marine protists
Mandoli, DF (1998). "Elaboration of Body Plan and Phase Change during Development of Acetabularia: How Is the Complex ...
Marine life
Mandoli DF (June 1998). "Elaboration of Body Plan and Phase Change During Development of Acetabularia: How Is the Complex ...
Mikhail Stepanovich Voronin
Acetabularia. M.S. Voronin thoroughly studied the ontogenesis of Acetabularia and demonstrated that it was the initial stage in ...
Andaman Islands
... as Acetabularia jalakanyakae. Jalakanyakae is a Sanskrit word that literally means a mermaid. Andaman forests contain 200 or ...
Plakobranchus ocellatus
They feed on a broad food spectrum, including members of the genera Halimeda, Caulerpa, Udotea, Acetabularia and further ...
Brian Goodwin
... as Acetabularia) to multicellular organisms, including early development in Drosophila. He proposed that morphogenetic fields, ...
Genetics
... genetic information in eukaryotes had been established by Hämmerling in 1943 in his work on the single celled alga Acetabularia ...
Elysia chlorotica
Genomic analysis of Acetabularia acetabulum and Vaucheria litorea, the primary food sources of Elysia timida, has revealed that ...
World Register of Introduced Marine Species (WRiMS) - Acetabularia calyculus J.V.Lamouroux, 1824
from synonym Acetabularia subg. Acicularia caliculus J.V. Lamouroux, 1824). Published in AlgaeBase To Barcode of Life To ... To PESI (from synonym Acetabularia subg. Acicularia caliculus J.V. Lamouroux, 1824). ... Acetabularia calyculus J.V.Lamouroux, 1824. Accessed through: Rius, M.; Ahyong, S.; Costello, M. J.; Galil, B. S.; Gollasch, S ... Acetabularia calyculus J.V.Lamouroux, 1824. Accessed at: https://marinespecies.org/introduced/aphia.php?p=taxdetails&id=494810 ...
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Flavodiiron proteins function as alternative electron sinks in E. timida and Acetabularia. E. timida and Acetabularia utilize ... High-CO2 Acetabularia curves in (B,D) are averages from three biological replicates. Ambient-air and high-CO2 Acetabularia ... Strain, strain background (Acetabularia acetabulum). Acetabularia acetabulum Düsseldorf Isolate 1 (DI1). This paper, Schmitt et ... and Acetabularia (red) during a 780 ms high-light pulse.. (A) ECS measured from E. timida and Acetabularia upon exposure to a ...
North Atlantic Register of Marine Species (NARMS)
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1976 in separating Polyphysa and Acetabularia along morphological lines. Alternatively, Silva et al. 1996 (p. 890-4) ... Acetabularia, until the picture is clarified. UTEX has accepted these cultures from the Max-Planck Institute fur Zellbiologie, ... Acetabularia clavata , Notes: (Berger & Kaever 1992); [Curators note: Berger & Kaever 1992 follow Bailey et al. ... Acetabularia (Polyphysa) clavata (Yamada); Parvocaulis clavata (Berger 2003); Acetabularia clavata. Notes:. (Berger & Kaever ...
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Sunday Protist resumed: Acetabularia Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest ... Acetabularia was at one point used as a model for circadian rhythm studies - it maintains its rhythm in the absence of the ... Acetabularia. Scenedesmus*. Hydrodictyon. Choreocolax*. Alveolates. Gregarines. Dinos:. Dinophysis 1, 2. Protoperidinium*. ... Since I like large complicated cells, todays menu features Acetabularia:. (UBC Botanical Garden). Each of those umbrella-like ...
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ESPAÇADORES ACETABULARES DE QUADRIL //SISTEMAS DE MISTURA PARA CIMENTOS ÓSSEOS//CONJUNTO DE PREPARAÇÃO FEMORAL//KIT ... ESPAÇADORES ACETABULARES DE QUADRIL //SISTEMAS DE MISTURA PARA CIMENTOS ÓSSEOS//CONJUNTO DE PREPARAÇÃO FEMORAL//KIT ... ESPAÇADORES ACETABULARES DE QUADRIL //SISTEMAS DE MISTURA PARA CIMENTOS ÓSSEOS//CONJUNTO DE PREPARAÇÃO FEMORAL//KIT ...
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Acetabularia mediterranea Biological Process. gamete generation Cellular Component. nucleus At cyst formation in the giant ... Acetabularia mediterranea Biological Process. gamete generation Cellular Component. nucleus At cyst formation in the giant ... unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis ... unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis ...
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Alga3
- We found that the slug Elysia timida induces changes to the photosynthetic light reactions of the chloroplasts it steals from the alga Acetabularia acetabulum . (elifesciences.org)
- At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. (ucsd.edu)
- They occur at the diplotene stage of meiotic prophase in oocytes of an animal Salamandor and in giant nucleus of the unicellular alga Acetabularia. (brainkart.com)
Mediterranea1
- A drawing of Acetabularia mediterranea by Ernst Haeckel. (btiscience.org)
Species3
- A couple species of Acetabularia produce morphologically distinct caps, so Hämmerling cut off the caps and exchanged the stalks between the two species. (fieldofscience.com)
- Acetabularia species provided an opportunity to explore how DNA in the nucleus regulated cellular growth and the function of chloroplast proteins by swapping the nuclei between different species of the algae. (btiscience.org)
- He graduated with his doctorate in 1970, but stayed on for two years at the Max Planck Institute as a research assistant, which included six months of travel all over the South Pacific to collect new species of Acetabularia . (btiscience.org)
Algae3
- During his time there, Apel heard a talk from a researcher at the Max Planck Institute for Cell Biology in Wilhelmshaven, who was investigating a single-celled algae called Acetabularia . (btiscience.org)
- Structure of acetabularia (a largish ~1 inch single cell algae), the structure of eye, the Fibonacci pattern seen in many flower structures being the main examples. (damitr.org)
- Numerous green algae, such as the characteristic acetabularia umbrellas, the Udotea petiolata leafy and the articulated with flattened discs Helimeda tuna, Brown algae such as Padina pavonia, Dictyopteris polypodiedes and Dyctiota dichtoma. (lestradedelvinopuglia.com)
Nucleus1
- Acetabularia was at one point used as a model for circadian rhythm studies - it maintains its rhythm in the absence of the nucleus, implying a cytosolic component to biological clock regulations (briefly mentioned here ). (fieldofscience.com)
Work1
- willing click of ' Real Genetic vs. s cards in the work of Acetabularia. (marika-ursprung.de)
Acetabulum2
- A rhodopsin from Acetabularia acetabulum (AR) is characterized by molecular genetic and electophysiological means. (uni-goettingen.de)
- Ein Rhodopsin aus Acetabularia acetabulum (AR) wird mit molekulargenetischen und elektrophysiologischen Mitteln charakterisiert. (uni-goettingen.de)
Species7
- Amino acid sequences of the small subunit of ribulose-1,5-bisphosphate carboxylase (SSU) of Acetabularia cliftonii and A. mediterranea were derived from five cDNA sequences of each of the two species of algae and by direct amino acid sequence determination of the isolated protein. (nih.gov)
- The fact that this species of unicellular algae remain alive and with few modifications turns Acetabularia into a panchronic living being with the cycads. (veterinariadigital.com)
- Ribulose-1,5-bisphosphate carboxylase, a marker for chloroplast species specificity in Acetabularia. (mpg.de)
- Following up on their curiosity, scientists from the Central University of Punjab (CUP), India have discovered the new plant species, green algae, which has been christened as Acetabularia Jalakanyakae. (planetcustodian.com)
- The parent group of the species Acetabularia is also recognized as 'mermaid's wineglass,' owing to its mesmerizing structure. (planetcustodian.com)
- Given the rich amounts of calcium carbonate deposits in the Acetabularia plants, scientists have raised concerns over the devastating impact of ocean acidification caused by global greenhouse gas emissions on the species. (planetcustodian.com)
- In Systema Naturae , Linnaeus described the genera Volvox and Corallina , and a species of Acetabularia , among the animals. (tutordale.com)
Labrum1
- Bridwell KH, Sedgewick Acetabulare labrum, O'Brien MF, Lenke LG, Baldus C. The role of fusion and instrumentation in the treatment of degenerative spondylolisthesis with spinal stenosis. (redonxe.xyz)
Jalakanyakae1
- Scientists from the Central University of Punjab have named the specie Acetabularia jalakanyakae. (berkeley.edu)
Genetic1
- transnational opinion of ' Real Genetic vs. dramatic cookies in the message of Acetabularia. (marika-ursprung.de)
Fast1
- To broaden the application of GEVIs in high-speed multispectral imaging, we used a high-throughput strategy to develop voltage-activated red neuronal activity monitor (VARNAM), a fusion of the fast Acetabularia opsin and the bright red fluorophore mRuby3. (nih.gov)
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