Scenedesmus is a widely distributed green algae found freely in stagnant water. It appears in pure culture in aquarium and in jar containing standing uncharged water in the laboratory.
It is colonial form with a number of cells in the coenobium (colony) being multiplies of two usually 4-8 cells. The cell are ellipsoidal or fusiform in shape and arranged in single or double series with long axis, parallel to one another so as to form a flat or curve plain. The two end cells of the coenobium may differ from the shape of the others and often teeth or spines or gelatinous bristles, which are projections of the mucilaginous cell envelope .each cell is un-nucleated and contain a single longitudinal laminate chloroplast with one pyrenoid.
Reproduction is by the formation of 2, 4,8,16 or 32 autospores by each cell in the colony. They remain laterally united to another to form a coenobium which is liberated by rupturing of the parent cell wall.
Posted in: Microbiology
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