As a seed germinates,its shoot points upward toward light,and its roots grows downward into the soil.Turn the plant sideways,and the stem and roots bend according to the new direction of gravity.How do roots respond to gravity?

Question

Quizplus · Accepted Answer

The movement of statoliths within specialized cells called statocytes is responsible for the root's response to gravity. Statoliths are dense structures that settle to the bottom of the cell under the influence of gravity, which triggers a signal transduction pathway that causes the root to grow in the direction of gravity. Thigmotropism is the growth response to touch, circadian rhythms regulate biological processes according to the time of day, light absorption by phytochromes regulates plant development, and photoperiod is the duration of light exposure that regulates flowering in plants.

As a Seed Germinates,its Shoot Points Upward Toward Light,and Its