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Phycology basic presentation

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Phycology basic presentation

  1. 1. Basics of Algology ©Copyright to www.dna2life.com
  2. 2. Phycology actually is the study of algae, and this term Phycology derived from the Greek term “PHYKOS” which means “SEAWEED”. ©Copyright to www.dna2life.com
  3. 3. •Algae are thallophytes. •Algae are Eukaryotes. •Algae belong to the kingdom Protista. •Algae can range from microscopic algae to large seaweeds and are mostly photosynthetic. ©Copyright to www.dna2life.com
  4. 4. ©Copyright to www.dna2life.com Heterogeneous Autotrophic True embryogenesis absent. Vascular tissues absent ( there are no xylem & phloem or true roots, stems or leaves). Both sexual and asexual reproduction can be found.
  5. 5. Depending on main five characteristics algae can be classified primarily as follows: Presence of photosynthetic pigments, On the basis of cell structure, Character of cell wall constituent, Type of food reserves, Type of flagella. ©Copyright to www.dna2life.com
  6. 6. Some important systems of classification of Algae are… Fritsch, F E, (1935); Smith, G.M. (1955); Bold & Wynne (1985); Lee, R.E. (1989). There are various divisions and classes but we here discussing only on following some important phyla…  Cyanophyta  Prochlorophyta  Glaucophyta  Rhodophyta  Chlorophyta  Euglenophyta  Dinophyta  Cryptophyta  Chrysophyta  Prymnesiophyta  Bacillariophyta  Xanthophyta  Eustigmatophyta  Raphidophyta  Pahaeophyta. ©Copyright to www.dna2life.com
  7. 7. Basic Visual Idea ©Copyright to www.dna2life.com
  8. 8. Cyanophyta Blue-Green Algae with chlorophyll a and phycobiliproteins and glycogen as storage food. ©Copyright to www.dna2life.com
  9. 9. Prochlorophyta With both chlorophyll a & b. ©Copyright to www.dna2life.com
  10. 10. Glaucophyta They have endosymbiont blue- green algae in the cytoplasm instead of chloroplast. Flagella present and whiplash type. ©Copyright to www.dna2life.com
  11. 11. Rhodophyta Presence of both chlorophyll a & b. Storage product is floridian starch. ©Copyright to www.dna2life.com
  12. 12. Chlorophyta With both chlorophyll a & b. Reserve food starch within chloroplast usually in association with a pyrenoid. ©Copyright to www.dna2life.com
  13. 13. Euglenophyta Have both chlorophylls a and b. Nucleus mesocaryotic. Paramylon formed as storage product. ©Copyright to www.dna2life.com
  14. 14. Dinophyta A typical motile dinoflagellate consists of an epicone and hypocone divided by the transverse girdle. Chlophyllua a & c2 . ©Copyright to www.dna2life.com
  15. 15. Cryptophyta Contains both chlophylls a and c2. Phycobilins present outside the thylakoids. Starch as researve food present outside the chloroplast. ©Copyright to www.dna2life.com
  16. 16. Chrysophyta Golden brown in color due to presence of facoxanthin and ß carotene. Storage product is crysolaminarin. ©Copyright to www.dna2life.com
  17. 17. Prymnesiophyta Presence of haptonema between two smooth flagella. Cells are usually covered with scales. ©Copyright to www.dna2life.com
  18. 18. Bacillariophyta Brown fucoxanthin gives the brown color. Cell are surrounded by a rigid two part box like cell wall composed of silica, called the frustule. ©Copyright to www.dna2life.com
  19. 19. Xanthophyta Most cell wall is composed of two overlapping halves. Motile cells with a forwardly directed tinsel flagellum and a posteriorly directed whiplash flagellum. ©Copyright to www.dna2life.com
  20. 20. Eustigmatophyta The only chlorophyll is ‘a’. Starch is not reserve food. ©Copyright to www.dna2life.com
  21. 21. Raphidophyta Cells are large dorsiventrally constructed. Presence of chlorophyll a and c. ©Copyright to www.dna2life.com
  22. 22. Phaeophyta Mostly marine. Flagella two inserted laterally, one anterior tinsel & another poterior whiplash Storage product is laminarin. ©Copyright to www.dna2life.com
  23. 23. Algae mainly differ from fungi in possessing chlorophyll and a characteristically holophytic, photosynthetic mode of nutrition. For further advanced study and information keep eyes on updates from dna2life.com ©Copyright to www.dna2life.com

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