explain phtotropism with an example .how does it ouccr In plant
Answers
Answer:
- The movement of plant or other organism in response to light is called as phototropism. The movement can be either towards the light or away from it. Stem grows in direction of the sunlight (positively phototropic) and roots grows away from it (negatively phototropic). The growth is controlled by plant hormone, auxin.
Answer:
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Explanation:
Growth movement of the shoot in plants in response to a light stimulus is called phototropism. this movement is caused due to more growth of cells towards the shaded side of the shoot as compared to the side of shoot towards the light.
This happens as follows:
(i) When sunlight falls straight on the plant, the auxin hormone synthesized at the tip of the stem spreads uniformly down the stem and due to an equal concentration of auxin, shoot grows straight.
(ii) When sunlight falls on only one side of the plant, the auxin diffuses toward the shady side of the shoot. The concentration of auxin stimulates the cells to grow longer. Therefore, the stem appears to bend towards the source of light.