Oedogonium

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Oedogonium

  1. 2. INTRODUCTION:
  2. 3. TOPIC : OEDOGONIUM SUBMITTED TO: MAM FARYAL GOHAR SUBMITTED BY: USMAN ABDULLAH ROLL NO:10060607-053 BS(HON) CHEMISTRY IST SEMESTER
  3. 4. OEDOGONIUM <ul><li>Outline of oedogonium </li></ul><ul><li>DEFINITION </li></ul><ul><li>STRUCTURAL INFORMATION: THE GENIUS OEDOGONIUM </li></ul><ul><li>SCIENTIFIC CLASSIFICATION OF OEDOGONIUM </li></ul><ul><li>FORMATION OF RING </li></ul><ul><li>REPRODUCTION </li></ul><ul><li>ASEUAL REPRODUCTION </li></ul><ul><li>SEXUAL REPRODUCTION:ZOOSPORE </li></ul><ul><li>CONCLUSION </li></ul>
  4. 5. <ul><li>Definition; </li></ul><ul><li>Oedogonium is an </li></ul><ul><li>unbranched, filamentous green algae that is easily identified by distinctive rings at the apical ends of certain cells. </li></ul>
  5. 6. OEDOGONIUM:
  6. 7. ORIGIN OF THE WORD OEDOGONIUM: <ul><li>Oedogonium: </li></ul><ul><li>Oedogonium is a genius of filamentous green algae. </li></ul><ul><li>From Greek: </li></ul><ul><li>oidos” swelling”+ gonos,”offspring </li></ul>
  7. 8. STRUCTURAL INFORMATION: <ul><li>Each cellular division creates a new ring on the cap. </li></ul><ul><li>The cells are cylindrical,sometimes broder at one end,and contain a parietal,net like chloroplast with several pyrenoids. </li></ul><ul><li>The cell wall are very hard,which makes the at least 250 oedogonium species distinguished by the </li></ul><ul><li>size of the vegetative cells, </li></ul><ul><li>the variations in the size and shape of oogonia, </li></ul><ul><li>the location of antheridia , </li></ul><ul><li>and the variations in patterns on the zygotewal. </li></ul>
  8. 9. WHAT IS CELL CAP?
  9. 10. STRUCTURE:
  10. 11. SCIENTIFIC CLASSICIFICATION OF OEDOGONIUM KINGDOM PROTISTA DIVISION CHLOROPHYTA CLASS CHLOROPHYCEAE ORDER OEDOGONIALES GENUS OEDOGONIUM
  11. 12. THE GENUS OEDOGONIUM: <ul><li>There is a dense chloroplast, usually filling the cell, with pyrenoids. </li></ul><ul><li>Cells frequently are wider at one end than the other:occasionally one finds bulbous, almost globular cells. </li></ul>
  12. 13. FORMATION OF RING: <ul><li>Cell division in germling and young filaments of oedogonium is described. </li></ul><ul><li>In one species, division proceeded as expected. </li></ul><ul><li>The ring was formed at the apical wall,and the basal cell did not divide again; the cap of wall derived from the basal cell was sometimes incorporated into the wall of the new apical cell. </li></ul>
  13. 14. <ul><li>The second species show significant difference. </li></ul><ul><li>The “ring” laid down in the single_celled germiling, and sometimes in the apical cell of a two_celled filament covered the whole apical end wall;the basal cell also usually underwent one more division,utilizing a normal ring. </li></ul><ul><li>It is suggested that the formation of rings of cell division represents adaption of a wound_response mechanism, brought into action by the deliberate creation of the circumferential weakning in the apical cell wall,and a concurent increase in the cell turgor. </li></ul>
  14. 15. <ul><li>The deposition of two rings in cells that had been previously treated with colchicine to prevent cytokinesis,then been allowed to divide again. </li></ul>
  15. 16. LIFE CYCLE OF OEDOGONIUM ASEXUAL REPRODUCTION SEXUAL REPRODUCTION;ZYGOTE PRODUCTION SEXUAL REPRODUCTION: ZOOSPORE
  16. 17. LIFE CYCLEE OF OEDOGONIUM:
  17. 18. ASEXUAL REPRODUCTION; <ul><li>Oedogonium is aform of filamentous green algae. </li></ul><ul><li>It is capable of reproducing sexually,which means that each oedogonium has both male and female reproductive organs. </li></ul><ul><li>In asexual reproduction,the oedogonium fragments produses zoospore. </li></ul><ul><li>Zoospore are able to move spontaneously through the water. Once the zoospore is produced,it is released and is free to find a suitable substrate. Once found ,the zoospore’s cells are able to divide and form a new filament of oedogonium. </li></ul>
  18. 19. SEXUAL REPRODUCTION:ZYGOTE PRODUCTION <ul><li>In addaition to being able to reproduce asexually, the oedogonium is capable of reproducing sexually. </li></ul><ul><li>In sexual reproduction ,the filament portion of the oedogonium, called the antheridium, produces and release sperm. </li></ul><ul><li>The sperm sinks through the water until it meets the filament portion of the oedogonim,called the oogonium,oogonium, which contains alarge cell. </li></ul><ul><li>If the sperm successfully fertilizes the egg, a zygote is produced. </li></ul>
  19. 20. SEXUAL REPRODUCTION : <ul><li>After the zygote is produced,it is released into the water and developes zoospore. </li></ul><ul><li>The zoospore are similar to those created through asexual reproduction. </li></ul><ul><li>Once the zoospore mature, the zygote splits open, releasing the zoospore. </li></ul><ul><li>The zoospores then attach to the bottom of the sea. </li></ul>
  20. 21. SEXUAL REPRODUCTION OF OEDOGONIUM : <ul><li>Oedogonium reproduces sexually by producing oogonia,which each contain a single large non_flagellate egg cell,are antheridia,which contain small sperm with multiple flagella. </li></ul><ul><li>Some species produce dwarf male plant that grow near the oogonia. </li></ul>
  21. 22. WHERE IS CHLOROPLAST?
  22. 23. SEXUAL REPRODUCTION OF OEDOGONIUM ; <ul><li>Some species are monocious and can self fertilizing. </li></ul><ul><li>Some species are diousious and produses either the egg or the sperm and thus require two filaments for fertilization to occur , which increase genetic diversity. </li></ul><ul><li>MONOCIOUS SPECIES </li></ul><ul><li>Didiodiousioususious spedi:OCIOUS SPECIES </li></ul>
  23. 24. DIOUIOUS SPECIES:
  24. 25. OEDOGONIUM REPRODUSES SEXUALLYAS WELL AS VEGETATIVELY <ul><li>Vegetative reproduction; </li></ul><ul><li>The zoospore resulting from vegetative reproroduction are motile and may often be found swimming around prior to settling on a substratum by means of a holdfast disk(usually quite elaborate) and growing into filament. </li></ul><ul><li>There are a number of species.Mean cell diameter is an unreliable guide to species discrimination as filaments vary in width from one end to the other: however median diameter of 8, 14, 30 and 45 ------m. </li></ul><ul><li>This filament has holdfast disc and a calyptra. </li></ul>

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