AP BIOLOGY

Detailed explanation-1: -Hydrotropism modifies root growth to respond to a water potential gradient in soil and grow towards areas with a higher moisture content.

Detailed explanation-2: -The movement or the growth of a plant in relation to the stimulus of water is called hydrotropic movement and the equivalent response to the stimulus of water is called hydrotropism. In this type of movement, roots show positive hydrotropic response, as they move and grow towards the water.

Detailed explanation-3: -The survival of terrestrial plants depends upon the capacity of roots to obtain water and nutrients from the soil. Directed growth of roots in relation to a gradient in moisture is called hydrotropism and begins in the root cap with the sensing of the moisture gradient.

Detailed explanation-4: -Hydrotropism (hydro-“water"; tropism “involuntary orientation by an organism, that involves turning or curving as a positive or negative response to a stimulus") is a plant’s growth response in which the direction of growth is determined by a stimulus or gradient in water concentration.

Detailed explanation-5: -The movement of plant in response to water is known as hydrotropism. The movement or direction of growth depends upon the concentration or gradient of water. Auxin plays an important role in bending of roots towards water.