Question

any four strategies developed by plants to ensure xenogamy?​

Answer 1

Answer:

Various strategies adopted by flowering plants to prevent self-pollination are:

Dichogamy: It is the condition in which anthers and stigma mature at different times. Either anther matures before stigma (protandry) or stigma becomes receptive before anthers (protogyny). For example, in Aristolochia, protogyny occurs.

Dicliny: It is the presence of unisexual flowers in a plant. The plant may be monoecious if it has both male and female flowers or dioecious if male and female flowers are present on two different plants.

Herkogamy: It is the presence of a mechanical barrier between compatible pollen and stigma due to which self-pollination becomes impossible. For example, in Iris, a hood like covering covers the stigma.

Self-incompatibility: It is the inability of pollen to germinate on the surface of the stigma of a flower of same species. Due to self-incompatibility, viable pollen is not able to germinate on the surface of the stigma of the same species.

Explanation:

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