What is photonasty?
Answer (3)
photonasty is a type of nastic movement that is brought about by the stimuli which are non-directional but diffuse.Photonasty is induced by variation in the intensity of light.Many leaves that keep their surfaces fully exposed during the day time, drop at night.this dropping of leaves is brought about by changes in the turbidity of parenchymatous cells of the pulvini.
photonasty: * it is non directional movement of a plant towards or opposite a stimuli.. **** causes: due to increase or decrease in turgidity or due to exceptional growth it happens... ***
Photonasty is a non-directional plant movement in response to changes in light intensity, primarily affecting leaf position. It is regulated by light-sensitive proteins called phototropins, which dictate cell turgor changes. This mechanism allows plants to adjust their leaves for optimal light exposure during the day and conserve energy at night.
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