Plant Responses Flashcards
Stimulus
A stimulus (plural: stimuli) is anything that causes a reaction in an organism or in any of its parts
Response
A response is the activity of a cell or organism as a result of a stimulus
Tropism
A tropism is a change in the growth of a plant in response to an external stimulus
Positive Tropism
A positive tropism occurs when the growth is towards the stimulus
Negative Tropism
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. undirectional light)
Geotropism
Geotropism (or gravitropism) is the change in growth of a plant in response to gravity
Thigmotropism
Thigmotropism is a change in growth of a plant in response to touch
Hydrotropism
Hydrotropism is a change in growth of a plant in response to water
Chemotropism
Chemotropism is a change in growth of a plant in response to chemicals
Growth Regulator
A growth regulator is a chemical that controls the growth of a plant
Growth Promoter
A growth promoter is a chemical that causes increased growth in plants
Growth Inhibitor
A growth inhibitor is a chemical that causes a reduction in growth of plants
