• DESCRIPTION Frequent description Agar is a hydrophilic colloid obtained from marine algae (Rhodophyceae). (stjosephs-hospital.com)
  • The cytotoxic activity was induced by chemical compounds obtained from marine algae such as polyketides, terpenes, nitrogen containing compounds and polysaccharides [ 9 ]. (rroij.com)
  • The Rhodophyta comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. (wikipedia.org)
  • Red algae are protists or microscopic organisms in the phylum Rhodophyta, and range from simple one-celled organisms to complex, multi-celled organisms. (agcommercialloan.com)
  • Rhodophyta (red algae) A phylum of algae that are often pink or red in colour due to the presence of the pigments phycocyanin and phycoerythrin. (agcommercialloan.com)
  • The Rhodophyta (red algae) are a distinct eukaryotic lineage characterized by the accessory photosynthetic pigments phycoerythrin, phycocyanin and allophycocyanins arranged in phycobilisomes, and the absence of flagella and centrioles (Woelkerling 1990). (agcommercialloan.com)
  • Cell wall possesses cellulose, pectic compounds and certain mucopolysaccharides called phycocolloids. (pw.live)
  • The important phycocolloids of red algae are agar, carrageenin and funori. (pw.live)
  • While this was formerly attributed to the presence of pigments (such as phycoerythrin) that would permit red algae to inhabit greater depths than other macroalgae by chromatic adaption, recent evidence calls this into question (e.g. the discovery of green algae at great depth in the Bahamas). (wikipedia.org)
  • The red colour of red algae is due to abundant formation of phycoerythrin. (pw.live)
  • 53]. Red Algae possess phycoerythrin (red pigment, C34H46O8N4) & phycocyanin (the blue pigment, C34H46O8N4) that's why they appear in red color. (agcommercialloan.com)
  • Not all of these algae are a reddish color, though, as those with less phycoerythrin may appear more green or blue than red due to the abundance of the other pigments. (agcommercialloan.com)
  • The majority of species (6,793) are found in the Florideophyceae (class), and mostly consist of multicellular, marine algae, including many notable seaweeds. (wikipedia.org)
  • In addition to multicellular brown algae, it is estimated that more than half of all known species of microbial eukaryotes harbor red-alga-derived plastids. (wikipedia.org)
  • Then it was referred as Phaeophyceae, Rhodophyceae and Chlorophyceae [ 1 ]. (rroij.com)
  • The macro algae phaeophyceae (scytosiphongracilis) have high quantity of protein contents and was used in proteomic studies [ 7 ]. (rroij.com)
  • Mention any two vegetative reproduction in algae. (samacheer-kalvi.com)
  • Vegetative reproduction includes fission in unicellular forms the cell divides mitotically to produce two daughter cells, eg. (samacheer-kalvi.com)
  • A secondary endosymbiosis event involving an ancestral red alga and a heterotrophic eukaryote resulted in the evolution and diversification of several other photosynthetic lineages such as Cryptophyta, Haptophyta, Stramenopiles (or Heterokontophyta), and Alveolata. (wikipedia.org)
  • Algae and fungi (In Five Kingdom System, Fungi have their own Kingdom, Fungi) are considered together in thallophyta (having undifferentiated plant body), though there is basic difference in the mode of nutrition (i.e., autotrophic in algae and heterotrophic in fingi). (pw.live)
  • Red algae are abundant in marine habitats but relatively rare in freshwaters. (wikipedia.org)
  • The Gracilaria bursa-pastoris is an abundant alga that is responsible for the eutrophication in Nador lagoon in Morocco. (springeropen.com)
  • Some examples of species and genera of red algae are: Red algal morphology is diverse ranging from unicellular forms to complex parenchymatous and non- parenchymatous thallus. (agcommercialloan.com)
  • Describe the thallus of red algae. (samacheer-kalvi.com)
  • F.E. Fritsch proposed a classification for algae-based on pigmentation, types of flagella, reserve food materials, thallus structure and reproduction. (samacheer-kalvi.com)
  • This event (termed primary endosymbiosis) is at the origin of the red and green algae (including the land plants or Embryophytes which emerged within them)) and the glaucophytes, which together make up the oldest evolutionary lineages of photosynthetic eukaryotes, the Archaeplastida. (wikipedia.org)
  • 2005, the red algae are classified in the Archaeplastida, along with the glaucophytes and green algae plus land plants (Viridiplantae or Chloroplastida). (agcommercialloan.com)
  • The edible seaweeds species of kappaphycus (red algae) and padina (brown algae) are from the coast of Tamilnadu. (rroij.com)
  • Red algae are autotropic with the exception of a few like Harveyella. (pw.live)
  • Approximately 5% of red algae species occur in freshwater environments, with greater concentrations found in warmer areas. (wikipedia.org)
  • Red algae such as Palmaria palmata (dulse) and Porphyra species (laver/nori/gim) are a traditional part of European and Asian cuisines and are used to make other products such as agar, carrageenans and other food additives. (wikipedia.org)
  • Red algae are an ancient group of algae with over 5,000 living species. (pw.live)
  • a. euglenoids c. brown algae b. green algae d. red algae Rhodophyceae (Red Algae) There are about 5000 known species of Red Algae most of them are lived in marine except a few freshwater forms (Batrachospermum). (agcommercialloan.com)
  • It is a large group of algae consisting of about 831 genera and over 5;250 species. (agcommercialloan.com)
  • Red algae especially many species of the genus laurencia (order ceramiales, and family Rhodomelaceae) are considered to be the rich source of secondary metabolites. (rroij.com)
  • Antioxidative properties of seaweed extracts have been studied in several geographic regions, but only a few studies have been performed on tropical seaweed species, and no research has been done to determine antioxidant activity and valorization of the indigenous algae in Nador lagoon in Morocco. (springeropen.com)
  • 1. Water Blooms or Alga Bloom: Presence of large amounts of nutrients in waters also causes excessive growth of planktonic (free-floating) algae such as Microcystis, Oscillatoria, called an algal bloom imparts a distinct colour to the ater bodies. (rbsesolutions.com)
  • The daily discharges of domestic, agricultural, and industrial waste into the lagoon stimulate the proliferation of algae called "harmful algal blooms" [ 21 ]. (springeropen.com)
  • Marine algae have been classified into three classes based on the pigmentation namely brown, red and green algae. (rroij.com)
  • from Ancient Greek ῥόδον (rhódon) 'rose', and φυτόν (phutón) 'plant'), are one of the oldest groups of eukaryotic algae. (wikipedia.org)
  • The red algae form a distinct group characterized by having eukaryotic cells without flagella and centrioles, chloroplasts that lack external endoplasmic reticulum and contain unstacked (stroma) thylakoids, and use phycobiliproteins as accessory pigments, which give them their red color. (wikipedia.org)
  • A variety of pigments in algae provide different colours. (pw.live)
  • Algae are usually differentiated on the basis of their pigments and storage products (see table). (pw.live)
  • type of algae that is red in color (contain chlorophyll a and reddish accessory pigments) and can be found in deep and warm waters. (agcommercialloan.com)
  • Algae usually occur in a variety of habitats such as water, land as well as on the other plants and even animals. (pw.live)
  • 1. Habitat : Algae are predominantly aquatic through alsofound in other habitats. (rbsesolutions.com)
  • Fucoidan a sulfated polysaccharide found in brown algae, showed inhibitory action against the growth of colorectal cancer [ 10 ]. (rroij.com)
  • A few algae grow on the surface of aquatic plants and are called epiphytic algae (Coleochaete, and Rhodymenia). (samacheer-kalvi.com)
  • He published his classification in the book "The structure and reproduction of Algae" (1935). (samacheer-kalvi.com)
  • Red algae are divided into the Cyanidiophyceae, a class of unicellular and thermoacidophilic extremophiles found in sulphuric hot springs and other acidic environments, an adaptation partly made possible by horizontal gene transfers from prokaryotes, with about 1% of their genome having this origin, and two sister clades called SCRP (Stylonematophyceae, Compsopogonophyceae, Rhodellophyceae and Porphyridiophyceae) and BF (Bangiophyceae and Florideophyceae), which are found in both marine and freshwater environments. (wikipedia.org)
  • But despite their name, red algae can vary greatly in color from bright green, soft pink, resembling brown algae, to shades of red and purple, and may be almost black at greater depths. (wikipedia.org)
  • Unlike green algae, red algae store sugars outside the chloroplasts as floridean starch, a type of starch that consists of highly branched amylopectin without amylose, as food reserves outside their plastids. (wikipedia.org)
  • Algae included under kingdom Plantae by Whittaker (1969) are of three types : red algae, brown algae and green algae. (pw.live)
  • Green algae b. (rbsesolutions.com)
  • Blue green algae c. (rbsesolutions.com)
  • 3. Others: The green alga Cephaleuros virescens cuases red rust on the leaves of tea and C. coftèae causes red ust on the leaves of coffee. (rbsesolutions.com)
  • The presence study was carried out to investigate the potential bioactive metabolites in the marine algae Valoniopsis pachynema and Sargassum swartzii and to detect its antimicrobial properties. (rroij.com)
  • All algae get their energy from the sun from photosynthesis, but one thing that distinguishes red algae from other algae is that their cells lack flagella, the long, whiplike outgrowths from cells that are used for locomotion and sometimes serve a sensory function. (agcommercialloan.com)
  • An angiosperm male plant having 24 chromosomes in its pollen mother cells is crossed with a female plant bearing 24 chromosomes in its root cells. (unseenpassage.com)
  • They are found in fresh water,salty and marine water, in ice and in moist conditions.Sorne algae are found in unusual places also. (rbsesolutions.com)
  • Red algae are an important part of the world's ecosystem because they are eaten by fish, crustaceans, worms, and gastropods, but these algae are also eaten by humans. (agcommercialloan.com)
  • SUMMARY: Lactate oxidation during sulphate and sulphite reduction by growing or resting Desulfovibrio desulfuricans resulted in an enrichment of 12 C in the CO 2 released and also in the cell carbon during growth. (microbiologyresearch.org)
  • Both marine and freshwater taxa are represented by free-living macroalgal forms and smaller endo/epiphytic/zoic forms, meaning they live in or on other algae, plants, and animals. (wikipedia.org)
  • Dunaliella salina grows in salt pans (Halophytic algae), which can tolerate high concentration of salt content. (samacheer-kalvi.com)
  • The term algae (L. alga - sea weed) was first introduced by Linnaeus (1755) but the present day algae were delimited by de Jussieu (1789). (pw.live)
  • a) Sporogenous tissue of a young anther is composed of homogenous cells. (unseenpassage.com)
  • Antifungal activity was detected against various organisms such as the Aspergillus niger and Penicillin notatum using agar well diffusion method. (rroij.com)