Question

pollen pistil interaction in detail class 12in great detail...5vmarks questions.​

Answer 1

Answer:

→Pollen pistil interaction is the process of transfer of pollen grains of one plant to the pistil/stigma of the same or different plant, which can be either self or cross-pollination. The pistil is the female reproductive part of a flowering plant, while pollen grains are the male reproductive part of a plant.

Explanation:

★Outbreeding Devices

The section is related to the concept of Outbreeding devices and the relationship between pollen pistil interaction and Outbreeding devices.

Before proceeding to the types of Outbreeding devices, let’s understand what Outbreeding devices are.

★Outbreeding Devices Meaning

Outbreeding devices are the mechanisms/processes which the plants adapt to prevent self-pollination.

But why do plants use such devices? Here are the reasons:

Reasons for Outbreeding Mechanism

• Inbreeding Depression: The reason behind the adoption of such techniques by plants is that due to continued in-breeding, plants can develop a condition called inbreeding depression, leading to unhealthy offsprings.

• No Genetic Variations: in self-pollination, due to the same genes of males and females, there are any genetic variations.

• Unisexuality: If the plant is unisexual, Outbreeding is the only alternative.

• Unsynchronized Pollen Release: The release of pollen grains and receptivity of stigma should be synchronized for the breeding to happen. This prevents self-pollination.

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