Question

Does self incompatibility impose any restrictions on autogamy? Give reasons and suggest the method of pollination in such plants.

Answer 1

Yes, self-incompatibility imposes restrictions on autogamy. The reason for this may be as majority of flowering plants produce hermaphrodite flowers and when pollen grains come in contact with the stigma of the same flower they continue self-pollination. Such type of continued self-pollination results in Inbreeding depression. That’s why flowering plants have developed many devices to discourage self-pollination and to encourage cross-pollination. One of the major ways to prevent self-pollination is self-sterility or self incompatibility, i.e. in some bisexual flowers, if the pollen grains fall on the stigma of the same flower, germination does not occur. But the same pollen grains germinate when they fall on the stigma of other flowers of the same species. It is a genetical mechanism to prevent self-pollination and promote cross-pollination.

Answer 2

HLO MATE HERE IS UR ANSWER

⭐. Self incompatibility is also known as self - sterility .

⭐. It is a divice to prevent in breeding.

⭐. Definitely self incompatibility imposes restrictions on autogamy.

⭐. Self - sterility is a genetic mechanism which prevents self pollination from fertilising the ovules by inhibiting pollen germination or pollen tube growth in thr pistil.

⭐ In such plants cross pollination is the only device to occur.