Question

Select the matching pair from the following:

• A. Red light →→→majority of phytochromes are translocated from nucleus to the cytosol
• B. Green light →→→ major impact on chlorophyll absorption
• C. Blue light →→→ increases stomatal opening
• D. Yellow light →→→ enhances flower blooming

Answer 1

Answer:

A. Red light →→→majority of phytochromes are translocated from nucleus to the cytosol

• Phytochromes are red (R)/far-red (FR) light photoreceptors that play fundamental roles in photo perception of the light environment and the subsequent adaptation of plant growth and development.

• Phytochromes are synthesized in the cytosol in their inactive Pr form.

• The exposure to red light converts phytochrome in the shaded leaves to the Pr (inactive) form, which slows growth.

• The leaves in full sunlight are exposed to red light and have activated Pfr, which induces growth toward sunlit areas.