Question

The curvature movement of plant in response to touch stimulus:
A. Hyponastic
B.Epinastic
C. Thigmotrophism
D.Scismonastic
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Answer 1

These curvature movements occur when a plant is provided with artificial or natural light only from one direction. Stems which generally show a curvature toeard the source of light are said to be positively phototropic. Roots which grow away from the source of light are called negatively phototropic.

Answer 2

Answer:

The curvature movement of plant in response to touch stimulus is Thigmotrophism.

Explanation:

• Thigmotropism is a directional growth movement that develops in response to a touch stimulation through the mechanosensory system.
• Plant biologists have also discovered thigmotropic reactions in blooming plants and fungus, while thigmotropism is often found in twining plants and tendrils.
• Unilateral growth inhibition is the cause of this behavior. That is, the side of the stem being contacted experiences slower growth than the side not being touched.
• The resulting growth pattern involves attaching to and occasionally curling around whatever is in contact with the plant.
• As in the case of Portulaca grandiflora, blooming plants have also been seen to migrate or expand their sex organs in the direction of a pollinator that lands on the flower.

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