HORTICULTURE

Detailed explanation-1: -Tropism is specific to the direction of the stimulus. Plants can either display a negative or positive movement in response to a stimulus. It is positive tropism when the movement is towards the direction of stimuli while it is negative tropism when the movement is away from the stimuli.

Detailed explanation-2: -Key Term: Negative Tropism A negative tropism is the response of a plant to grow away from a stimulus. For example, negative gravitropism is exhibited by the stem of a plant that grows away from the force of gravity.

Detailed explanation-3: -Growth in the direction of a stimulus is known as positive tropism, while growth away from a stimulus is known as a negative tropism.

Detailed explanation-4: -Phototropism is known as the growth of plants in response to light. Sunlight acts as a stimulus for the growth of organisms towards the light (positive phototropism) or away from light (negative phototropism).