In the process of plant shoots growing opposite the direction of gravity by gravitropism, high concentration of auxin moves towards the bottom side of the shoot to initiate cell growth of the bottom cells, while suppressing cell growth on the top of the shoot.
Similarly, it is asked, how does auxin cause Geotropism?
Just like phototropism, geotropism is also caused by an unequal distribution of auxin. When a stem placed horizontally, the bottom side contains more auxin and grows more – causing the stem to grow upwards against the force of gravity.
Beside above, how does Gravitropism help a plant? The growth of a plant or plant part because of the pull of gravity. How can a gravitropism help a plant meet its needs? The roots grow down towars the water and nutrients. The stem grows upward toards the sun for energy.
One may also ask, what is the role of auxin in plants?
Auxins promote stem elongation, inhibit growth of lateral buds (maintains apical dominance). Auxin is a plant hormone produced in the stem tip that promotes cell elongation. Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant.
How do Auxins cause Phototropism and Gravitropism in plants?
Auxin and gravitropism Phototropism is a response to the stimulus of light, whereas gravitropism (also called geotropism ) is a response to the stimulus of gravity . Plants responses to gravity: when the stem grows against the force of gravity, this is known as a negative gravitropism.