Ulotrix ( lat. Ulothrix ) is a genus of multicellular green algae from the Ulotrichales family. Representatives live in sea and fresh waters, forming a green mud on underwater objects. The most widespread species is the belted ulotrix ( Ulothrix zonata ).
| Ulotrix |
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| Scientific classification |
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| International scientific name |
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Ulothrix Kütz. , 1833 |
| Type view |
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Ulothrix tenuissima Kütz., 1833 |
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The filamentous type of differentiation of the thallus . Chloroplast walled in the form of a belt, closed or open, with several pyrenoids . The core is one, but it is not visible without painting.
Propagated mainly vegetatively by four-flagellated zoospores . The sexual process is isogamy ( gametes of the same size). Some species are characterized by heterotallism . Bicameral gametes are formed in cells as well as zoospores. They go outside and merge. The zygote, after a period of rest, grows into the codiolum stage, where its core passes. After some time, meiosis occurs , after which there may still be mitoses . As a result, 4-8 zoospores are formed, sprouting into new threads of ulotrix. All stages except the zygote are haploid .
