What dense storage granules in plant cells are thought to contribute to gravitropism?

Question

Quizplus · Accepted Answer

Starch is a dense storage granule composed of glucose molecules that is commonly found in plant cells. It has been shown to play a role in gravitropism, as it increases in concentration in the lower side of a root under the influence of gravity, causing the root to bend downwards. Proteins, chlorophyll, and cellulose are not directly involved in gravitropism.

What Dense Storage Granules in Plant Cells Are Thought to Contribute