self-incompatibility
Quick Summary
Self-incompatibility in plants is a genetic mechanism that prevents self-fertilization, promoting cross-pollination. This process ensures genetic diversity within a species, which is crucial for adaptation and survival in changing environments.12
There are several ways plants achieve self-incompatibility:
- Chemical self-incompatibility: Pollen may fail to germinate on the stigma of the same plant, or the pollen tube may not grow properly down the style to reach the ovule.12
- Structural mechanisms: Some plants are dioecious, meaning they have separate male and female individuals. Others exhibit dichogamy, where male and female reproductive parts mature at different times. Heterostyly, a variation in style length, also encourages cross-pollination.32
While self-pollination can be effective in stable environments, cross-pollination generally leads to more numerous and higher-quality seeds, contributing to the species' long-term evolutionary success.12
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angiospermPollination…developed a chemical system of self-incompatibility. The most common type is sporophytic self-incompatibility, in which the secretions of the stigmatic tissue or the transmitting tissue prevent the germination or growth of incompatible pollen. A second type, gametophytic self-incompatibility, involves the inability of the gametes from the same parent plant to…
Read More…developed a chemical system of self-incompatibility. The most common type is sporophytic self-incompatibility, in which the secretions of the stigmatic tissue or the transmitting tissue prevent the germination or growth of incompatible pollen. A second type, gametophytic self-incompatibility, involves the inability of the gametes from the same parent plant to…
Read More- angiospermPaleobotany and evolution
…history of flowering plants that self-incompatibility was evolved, a mechanism that prevents flowers or plants from self-pollinating. The pollen of many modern insect-pollinated bisexual flowers is incompatible with the flower in which it is produced.
Read More…history of flowering plants that self-incompatibility was evolved, a mechanism that prevents flowers or plants from self-pollinating. The pollen of many modern insect-pollinated bisexual flowers is incompatible with the flower in which it is produced.
Read More