The Genus Ulothrix

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Rupam Krishna Bharali

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Phylum Chlorophyta; sub-phylum Chlorophyceae; Order Zygnematales; Family Zygnemataceae

Ulothrix species are unbranched filamentous green algae. The cells are typically about as broad as they are long (or broader).

The chloroplast is a ring which runs around all or part of the circumference of the cell, and occupies almost its whole length.

They grow attached to surfaces by a modified holdfast cell.

Reproduction is mainly vegetative. The cell contents become densely coloured, then divide into several spherical zoospores which escape through a hole or tube in the cell wall: see the 2nd 3rd and 6th images. 



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