Chlorella is a green algae generally found to occur as a plankton in fresh water bodies and damp walls, rocks etc. The thallus is unicellular some times growing small groups and colonies.
Each cell is small cylindrical or ellipsoidal in shape. The cell is surrounded by 3 layered cell wall. The wall shows the presence of sporopollinin. Each cell posses a single large cup shaped chloroplast which is parietal in position. The cells are unicellular. The nucleus lies in the chloroplast cup, other cell organelles like mitochondrion, ribosome etc are present.
Asexual reproduction takes place by the formation of non-motile autospores. Two to sixteen autospores are produced and they are liberated by the rupture of the parental cell wall.
Posted in: Microbiology
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