Describe the life cycle of Vaucheria or ectocarpus
Answers
Explanation:
Vaucheria thallus is haploid. It is aseptate, branched, tubular and coenocytic structure. Vegetative re-production takes place by fragmentation. Asexual reproduction takes place by zoospore in aquatic species and by aplanospores in terrestrial species.
This typical life cycle of Ectocarpus exhibits morpholigically identical filaments representing sporophyte and gametophyte—isomorphic alternation of generations. ... While the one formed by the direct germination of the zygote bearing unilocular sporangia and plurilocular sporangia is the sporophyte having diploid cells.
Answer:
Vaucheria is represented by 54 species of which about 19 species are found in India. Vaucheria is found mostly in fresh water but about six species are marine and some are terrestrial found on moist soil.
The terrestrial species like V. sessilis and V. terrestris form green mats on moist soil in shady places in green houses. V. amphibia is amphibous. V. jonesii was reported by Prescott (1938) in winter ice in U.S.A. The common Indian species of Vaucheria are V. amphibia, V. geminata, V. polysperma, V. sessilis and V. uncinata etc.