Name: Pollen-Pistil Interaction
Uploaded: 2019-07-19
Duration: 4 min 55 s
Description: Pollen Pistil interactions are the sequence of events that are decisive in the selection of apt pollen for maintaining genetic diversity. Comprehend this dyn...

Question

Discuss the important outbreeding devices for cross pollination.

Accepted Answer

Cross-pollination is the transfer of pollen grains of one flower to the stigma of another flower through pollinating agents. Outbreeding is the phenomenon in which the individuals within a species will tend to breed with the other who are neither close relatives nor distant genetic relation but are the middle ground of the both. Some outbreeding devices are:

Unisexual flower or (Dicliny): The formation of the unisexual flowers promotes cross-pollination.

Non-synchronisation or (Dichogamy): it is the phenomenon where the maturation of the male and female gametes of the flower takes place at a different time and therefore self-pollination is prevented. Cross-pollination is the only option for this type of condition.

Herterostyly: in this condition, due to the great disparity in the length of style and stigma the effective self-pollination is not possible, and thus only cross pollination remains the option.

Herkogamy: in this condition, the homozygous flowers adapt certain devices in which only cross-pollination is possible.

Self-incompatibility: it is the condition where self-pollination is prevented to some physiological and morphological mechanism in flower or plant.

Discuss the important outbreeding devices for cross pollination.

Important Questions on Sexual Reproduction in Flowering Plants

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