EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -For example, stems usually exhibit positive phototropism, because they grow toward light. One of the lesser-known tropisms is hydrotropism, directed growth in response to water or moisture gradients.

Detailed explanation-3: -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-4: -Hydrotropism is the mechanism by which plants grow toward the presence of water in response to stimuli related to water. In this case, it is a form of positive tropism, which is the response of a plant to a stimulus that leads to growth or movement.

Detailed explanation-5: -Movement of plants in response to water is called hydrotropism. In this case, water is a stimulus to which the plant can show two responses. It can move towards the water source-Positive hydrotropism. It can move away from the water source-Negative hydrotropism.