Write short notes on the fertilization in Ectocarpus. long question
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Answer:
Fertilization in Ectocarpus: The two gametes of same gametangium or from two different gametangium of same thallus fuse to from zygospore. In physiologically anisogamous species, gametes from two filaments of different strains fuse. ... Its diploid nucleus divides mitotically to make diploid Ectocarpus plant.
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Answer:
in ectocarpus sexually and asexually both reproduction takes place. the two gametes of same gametangium of same thallus fuse to form zygospore. in physiologically anisogamus species gametes from two filament of different strains fuse. the female gamete after liberation secret a volatile sexual attractant sirenine.
A large number of male gametes are attracted and cluster around female gamete to make clump formation. after sometime one Male gamete fuses egg to make zygospore and other gamete detach themselves from female gamete . the zygospore germinate after 2-3 days . Its diploid nucleus divides mitotically to make diploid ectocarpus plant.