2.79 Plants and Stimuli

Key Points:

1. Plants have receptors which detect the stimuli and turn it into a response
2. The responses often take the form of growth, and this is called a tropism
3. Tropisms that involve light are called phototropism, and ones that involve the response to gravity and called a geotropism
4. The connection between the receptor and the response takes the form of plant growth regulators, or hormones
5. Stimuli are usually changes in the environment, such as light and temperature