“The structure and reproduction of the Algae”. Fritsch (1935, 1945 and his followers) opined that algae is itself equivalent to a division, and therefore it can only be divided into classes (=phyceae). Classification of Algae. Because of the range of diversity amongst algae, a scientist by the name of Fritsch attempted to classify algae into eleven classes in 1935. Class consists of only one order ‘ Chloromonadales’ e.g., Trentonia, Ø One or two flagella that arise from canal like invaginatrion at the, Ø The chrmatophore contain main pigment fucaxanthin besides the others, Ø Lower forms have naked pyrenoid like bodies. His classification, was based on such criteria as pigmentation, types of flagella, assimilatory products, thallus, Class I: Chlorophyceae ( Isokontae or Green algae), Pigments are chlorophyll a and b, carotenoids and xanthophylls. Found in fresh water or stagnant water or on moist soil; cells flagellated or naked; coloured plastids promi­nent; cell divisions longitudinal; reserve food is paramyleum (a kind of carbohydrate). Xanthophyceae 3. Chlorophyceae (green algae) Phaeophyceae (brown algae) Rhodophyceae (red algae). Male gametes are similar to zoospore but smaller in size. Full text Full text is available as a scanned copy of the original print version. Objective: To evaluate the performance in classifying systemic lupus erythematosus by the 2012 Systemic Lupus International Collaborating Clinics criteria (SLICC'12), versus the revised American College of Rheumatology criteria from 1997 (ACR'97) in adult and juvenile SLE patients. Ø The mitotic cells usually have a single flagellum, Ø Sexual reproduction by fusion of gametes, ü Centrales e.g., Cyclotella, Chaetoceras, ü Pennales e.g., Grammatophora, Navicula, Pinnularia. Ø Main pigment is xanthophylls which imparts brown or red colour. Fritsch classified algae into 11 classes on the basis of the type of pigments, mode of reproduction and nature of reserve food material. Chiefly marine; plant body large and complicated by the presence of pigment like fucoxanthin and phycophene; both sexual and asexual reproduction take place; sexual reproduction is isogamous and oogamous carbohydrate and oil are reserve food. Division-level classification, as with kingdom-level classification, is tenuous for algae. The algae have broadly been divided by F. F. Fritsch in 1935 into eleven classes according to their colour: i. Chlorophyceae or green algae, e.g. Examples of algae include diatoms, kelp, and spirogyra. Chlorophyceae 2. Heterothallic or dioecious species are of two types: macrandrous (where male and female filaments are of normal size) and nannandrous type (where male is very small i.e., dwarf male or nannandrium and the female one is of normal size).Chlorophyceae.  Classification is based on pigments, flagella and reserve food material. He treated algae giving rank of division and divided it into 11 classes. Phaeophyceae or brown algae, e.g. Chrysophyceae 4. Fctocarpus, Laminaria, Dictyota, Fucus, etc. x. Rhodophyceae or red algae e.g. CLASSIFICATION • Fritsch’s Classification of Algae: • F.E. As an aid to his own studies on algal taxonomy and morphology, Fritsch brought together published illustrations under the names of the species. Pyrophyta: Chiefly marine; unicellular; presence of two unequal flagella; yellowish green or yellowish … He published his classification in the book “The structure and reproduction of the Algae” (1935). According to Fritsch (1935), algae include all halophytic organisms that fail to reach the level of differentiation characteristic of archegoniate plants. Cryptophyceae 6. Ø Sexual reproduction rare or isogamous type, ü Desmonadales e.g., Desmocapsa, Pleromonas, Desmomastix, ü Thecatales e.g., Exuviaella, Porocentrum, ü Dinophyceales e.g., Dinophysis, Ornithocercus, Phalacroma, ü Dinoflagellata e.g., Amhidinium, Blastidinium, Ceratium, Heterocapsa, ü Dinotrichales e.g., Dinothria, Dinoclonium, Ø Bright green tint due to excess xanthophylls. Reproduction by vegetative , asexual and sexual methods. It is the largest class of algae; This lineage eventually led to the higher land plants. 4.  One of the best known algal classification was proposed by Fritsch who divided them into 11 classes (1945). He divided the algae into the following 11 classes Class I: Chlorophyceae (Isokontae or Green algae) So there is no word like phyta (e.g. 14. The classification of algae into taxonomic groups is based upon the same rules that are used for the classification of land plants, but the organization of groups of algae above the order level has changed substantially since 1960. Fritsch proposed a classification for algae­ based on pigmentation, types of ­flagella, ­reserve food materials, thallus­ structure and ­reproduction. Ø Reserve foods are laminarin ( Polysaccharide). Batrachospermun, Polysiphonia, etc. Fritsch Classification of Algae. Bacillariophyceae 5. Eleven classes proposed by Fritsch are as follows: 1. ix. ii. Fritsch (1935) classified algae into following 11 classes, based on pigmentation, reserve food material, flagellation and reproduction. Chrysophyceae 4. Discover everything Scribd has to offer, including books and audiobooks from major publishers. Classification of Algae by Fritsch. Get a printable copy (PDF file) of the complete article (2.9M), or click on a page image below to browse page by page. His classification was based on such criteria as pigmentation, types of flagella, assimilatory products, thallus structure and methods of reproduction. Oscillatonia, Nostoc, etc. Xanthophyceae 3. Nature of Reserve Food: The primary product of photosynthesis i.e., starch is same in all groups of … For example, some phycologists place the classes Bacillariophyceae, Phaeophyceae, and Xanthophyceae in the division Chromophyta, whereas others place each class in separate … Chlorophyceae ( Isokontae) Generally algae are fresh water and chlorophyllous thallophytes. Fritsch’s classification: F.E.Fritsch (1935, 1945) proposed a most comprehensive and anthroritative classification in his book “structure and reproduction of algae” . A brief account of this classification is given below: Cyanophyta or blue green algae-inhabitants of moist soil and rocks, fresh water or saline water; unicellular or colonial; plastids not well-defined; presence of nucleoplasm in the centre of the cell and chromoplasm in the periphery; nucleus is primitive; phycocyanin is the chief pigment but sometimes phycoerythrin may be present; sexual reproduction and flagellated cells are always ab­sent; reproduction is vegetative or asexual by resting spores; gly­cogen is the reserve food. Sep 7, 2014 - This Pin was discovered by Biology 4u. 1.1 ClASSIFICAtIon The classification of algae is complex and somewhat controversial, especially concerning the blue-green algae (Cyanobacteria), which are sometimes known as blue-green bacteria or Cyanophyta and sometimes included in the Chlorophyta. The three most prominent groups of algae are the brown algae, the red algae, and the green algae, amongst which some of the most complex forms belong to green algae. Methods: A systematic literature search was conducted in PubMed and Embase for studies comparing SLICC'12 … Chlorophyta, Rhodophyta etc.) ü Cryptomonadales e.g., Cryptomonas, Rhodomonas, Cyanomonas. The structure and reproduction of the algae Hardcover – January 1, 1965 by Felix Eugene Fritsch (Author) See all formats and editions Hide other formats and editions. F.E. DOCX, PDF, TXT or read online from Scribd, 67% found this document useful, Mark this document as useful, 33% found this document not useful, Mark this document as not useful, Save Classification Proposed by Fritsch For Later, The most comprehensive and authorative classification of algae was given by F.E Fritsch (, , 1948) in his book ‘ The Structure and Reproduction of the Algae’. Chlorophyceae 2. He divided it into 11 classes based on pigments,reserve food materials and flagellar types. They are found in fresh water or saline water; unicellular, multicellular or colonial; cells flagellated or non-flagellated; reproduction is asexual or sexual; presence of chlorophyll, carotin and xanthophyll like higher plants; reserve food is starch. Algae: Classification by Fritsch part 1(upto order) - YouTube Nostoc is a Colonial, filamentous algae seen as mucilaginous balls that belongs to the class cyanophyceae (Blue green algae) • Heterocysts are Large sized, colourless, spherical, thick walled cells present in the filaments of blue green algae like Nostoc • Position intercalary or terminal Xanthophyceae 3. He divided it into 11 classes. classification of algae was given by F.E Fritsch (1935) in his book ‘The Structure and Reproduction of the Algae’. His classification was based on such criteria as pigmentation, types of flagella, assimilatory products, thallus structure and methods of reproduction. There are … in classification proposed by him and his followers. Ø Pyrenoid like bodies are present, independent of chromatophores, Ø Motile cells are dorsiventral with anteriorly inserted unequal flagella. Algae are some of the most robust organisms on earth and are able to grow in a wide range of conditions. Bacillariophyceae or golden-brown algae e.g. These topics are not covered in … https://www.plantscience4u.com/2014/04/fritsch-classification-of-algae.html Botrydium. Xanthophyte chloroplasts contain the photosynthetic pigments chlorophyll a, chlorophyll c, β-carotene, and the carotenoid diadinoxanthin. Fritsch (1944-45) categorized algae into eleven groups in his book “Structure and Reproduction of Algae” that are based on the given characteristics: A. Pigmentation. Classification of Fritsch was based on the following criteria Pigmentation Types of flagella Assimilatory products Thallus structure Method of reproduction Fritsch divided algae into the following 11 classes 1.Chlorophyceae 2. Classification of Algae No easily definable classification system acceptable to all exists for algae because taxonomy is under constant and rapid revision at all levels following every day new genetic and ultrastructural evidence. E. Reproduction They are Chlorophyceae, Xanthophyceae, Chrysophyceae, Bacillariophyceae, Cryptophyceae, Dinophyceae, Chloromonodineae, Euglinineae, Phaeophyceae, Rhodophyceae and Myxophyceae (Cyanophyceae). 3. 1. Ø It consists of two halves which are radially or bilatorally symmetrical . Chiefly consists of Diatoms; terrestrial, fresh water or saline water; flagellated or non-flagellated; unicellular or multicellular, colonial or filamentous; cell wall made of pectin with deposition of silica particles on the surface; of the pigments carotin and Xanthophyll are present in abundance; special method of sexual reproduction; oil and leucosin (a complex carbohydrate) are reserve food. Plant Science Life Science Electron Microscope Images Plants Learning Study Blue Nails Studio Investigations. Article by Cheri Dennen. C. Reserve food. Classification of Algae by Fritsch A famous botanist F.E. Xanthophyceae or yellow—green algae e.g. Chlorophyceae (Green algae) General characterstics of Chlorophyceae. Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. iv. 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