NEET Botany Plant Growth and Development Questions Solved

Both red and blue light are involved in?
1. stem elongation.
2. photoperiodism.
3. positive phototropism.
4. tracking seasons.

Different organs of the plant may exhibit different phototropic reactions to different wavelengths of light. Stem tips exhibit positive phototropic reactions to blue light, while root tips exhibit negative phototropic reactions to blue light. Both root tips and most stem tips exhibit positive phototropism to red light.

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