Explain the types of autogamy self pollination
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1. Autogamy (Self-pollination):
It is the kind of pollination in which the pollen from the anthers of a flower is transferred to the stigma of the same flower, e.g., wheat, rice, pea, etc.
Autogamy is further classified as:
(i) Cleistogamy In some plants, flowers never open up and the anthers dehisce inside these closed flowers to ensure pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollination. These flowers produce assured seed sets even in the absence of pollinators, e.g., Oxalis, Viola, etc.
(ii) Homogamy In this method, both the anthers and the stigma mature at the same time, e.g., Mirabilis.
2. Geitonogamy:
It is a kind of pollination where the pollen grains from the anther of the flower are transferred to the stigma of another flower borne on the same plant but at different branches. It usually occurs in plants, which show monoecious condition, e.g., Cucurbita.
3. Xeno-gamy (Cross-Pollination):
It involves the transfer of pollen grains from the flower of one plant to the stigma of the flower of another plant. This is the only type of pollination which brings genetically different types of pollen grains to the stigma during pollination, e.g., papaya, maize, etc.
It is the kind of pollination in which the pollen from the anthers of a flower is transferred to the stigma of the same flower, e.g., wheat, rice, pea, etc.
Autogamy is further classified as:
(i) Cleistogamy In some plants, flowers never open up and the anthers dehisce inside these closed flowers to ensure pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollination. These flowers produce assured seed sets even in the absence of pollinators, e.g., Oxalis, Viola, etc.
(ii) Homogamy In this method, both the anthers and the stigma mature at the same time, e.g., Mirabilis.
2. Geitonogamy:
It is a kind of pollination where the pollen grains from the anther of the flower are transferred to the stigma of another flower borne on the same plant but at different branches. It usually occurs in plants, which show monoecious condition, e.g., Cucurbita.
3. Xeno-gamy (Cross-Pollination):
It involves the transfer of pollen grains from the flower of one plant to the stigma of the flower of another plant. This is the only type of pollination which brings genetically different types of pollen grains to the stigma during pollination, e.g., papaya, maize, etc.
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Autogamy self-pollination is a type of self pollination in which two gametes come togetehr from the same individual for fertilization.
Explanation:
Autogamy is a reproductive mechanism present in several flowering plants that involves only one or same flower for reproduction.
There are two types of autogamy self pollination:
- Cleistogamy Pollination: This type of pollination takes place in the flowers which remain closed or do not open and follows self-fertilization inside the bud. Example- Balsam, Oxalis.
- homogamy Pollination: In this pollination flower recives pollen from the stamen of same flower and fertilize in the pistil of the same flower. Example - Mirabilis, Catharanthus .
Learn more about self pollination:
https://brainly.in/question/15050971
https://brainly.in/question/1030306
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