NEET BIOLOGY

Detailed explanation-1: -Phototropism is the movement of plant parts in response to light. Thus, the stimulus for phototropism is “Light”.

Detailed explanation-2: -We conclude that a prolonged reduction of blue light in the environment promotes phototropism and is not merely a consequence of enhanced hypocotyl elongation. Figure 1. The blue light component of canopy shade is critical for phototropism in green seedlings.

Detailed explanation-3: -Phototropism is a response to the stimulus of light, whereas geotropism (also called gravitropism) is a response to the stimulus of gravity .

Detailed explanation-4: -Phototropism is the ability of the plant to re-orient the shoot growth towards a direction of light source. Phototropism is important to plants as it enhances the ability of plants to optimize their photosynthetic capacity. As discussed above, phototropic response is exclusively controlled by phots.

Detailed explanation-5: -Auxins: the master growth regulator The term auxin is derived from the Greek word auxein, which means “to grow.” Auxins are the main hormones responsible for cell elongation in phototropism (movement in response to light) and gravitropism (movement in response to gravity).