Most probable Ncert lines of Inbreeding devices,class 12
Introduction All of you know that pollination is of two types. 1. Autogamy / Inbreeding 2. Allogamy / Outbreeding Some conditions in bisexual flowers favour Inbreeding ( contrivances of self pollination). We call these conditions as Inbreeding devices. Major Inbreeding devices are: 1. Bisexuality: The flower is having both stamen and carpel and they're close to each other. Note: Bisexuality is the main Inbreeding device. 2. Homogamy: Here, both anther and stigma of bisexual flower mature at the same time i.e synchronisation between release of pollen grains and receptivity of stigma. 3. Cleistogamy: Interestingly, some flowers are bisexual but remain closed even after maturity ex. Commelina, Viola. Hence, pollen grains self-pollinated the stigma of same flower. Note: Cleistogamous flowers always show autogamy and also show assured seed formation. 4. Bud pollination: Some bisexual flowers of plants like Rice,Wheat,Pea show bud condition even after maturity. So Inbreeding occur...