Question

When do you thick chloroplast will be aligned with their flat surfaces perpendicular to incident light?

Answer 1

Incoming sunlight can strike a flat leaf surface at a vari- ety of angles .... Then we will describe how chloroplasts and leaves acclimate to .... lamina, is perpendicular to the incident light.

Answer 2

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Chloroplast align parallel to the walls of mesophyll cells (mainly palisade cells) when intensity of light is minimum, to get more and more of light. This condition is called Epistrophe.

And when the intensity of light is maximum the chloroplast gets alinged perpendicular to the incident light or the mesophyll cells to avoid photooxidation of chlorophyll a molecule This condition is called Parastrophe.