Plant responses Flashcards
A stimulus
A stimulus (plural: stimuli) is anything that causes a reaction in an organism or in any of its parts
A response
A response is the activity of a cell or organism as a result of a stimulus
A tropsim
A tropism is a change in the growth of a plant in response to an external stimulus
A positive tropism
A positive tropism occurs when the growth is towards the stimulus
A negative negative
A negative tropism occurs when the growth is away from the stimulus
Phototropism
Phototropism is the change in growth of a plant in response to light, usually from one direction (i.e unidirectional light)
Geotropism
Geotropism (or gravitropism) is the change in growth of a plant in response to gravity
Thigmotropism
Thigmotropism is the change in growth of a plant in response to touch
Hydrotropism
Hydrotropism is the change in growth of a plant in response to water
Chemotropism
Chemotropism is the change in growth of a plant in response to chemicals
A growth regulator
A growth regulator is a chemical that controls the growth of a plant
A growth promoter
A growth promoter is a chemical that causes increased growth in plants
A growth inhibitor
A growth inhibitor is a chemical that causes a reduction in growth of plants
