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NTA Abhyas NEET2020BotanyPlant - Growth and DevelopmentPractice

Bending of stem/coleoptile towards light or shoot of potted plant placed near a window is due to:

Options

  1. AGreater oxygen availability to the tip
  2. BMore auxin content on the shaded side
  3. CGreater light availability to tip
  4. DAvailability of necessary warmth to the tip

Correct answer

B. More auxin content on the shaded side

Step-by-step solution

Auxin is a plant hormone that plays an important role in phototropism. It is equally distributed in the plant cells that is why they show cell elongation. Auxin concentration is found more in the shaded side than illuminated side so the plant grow more on the shaded side and bend in the direction of the light source.

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