Unit V - Plants Anatomy and Physiology
Ch. 13.6 Control of Plant Growth and Development
Plant growth regulator: a chemical produced by plant cells that regulates growth and differentiation
Plants can modify their growth and differentiation through plant growth regulator
- act by signaling plant cells to undergo particular changes
- auxins, gibberellins, cytokinin, ethylene, and abscisic acid
Tropisms and Plant Growth Regulators
Tropism: a directional change in growth/ movement in response to a stimulus
Phototropism: a change in direction of a growing plant in response to light
Gravitropism: a directional change in growth pattern in response to gravity
Thigmotropism: a directional change in growth pattern in response to touch