Question: Explain the directional movement due to growth in response to touch in a pea plant?
The directional movement due to growth in response to touch in a pea plant is called thigmotropism. It is a type of tropic movement that occurs when the plant parts, such as tendrils, come in contact with a support and coil around it. This happens because the part of the tendril that touches the support grows slower than the part that is away from it, creating a curvature. The growth is regulated by a plant hormone called auxin, which accumulates on the side opposite to the stimulus and causes cell elongation. Thigmotropism helps the pea plant to climb and reach more sunlight.
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