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 2. Plants can respond to light, touch, gravity, and seasonal changes

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PostSubject: 2. Plants can respond to light, touch, gravity, and seasonal changes   19/04/09, 10:06 am

a.Phototropism: tendency of a plant to grow toward light

b.Thigmotropism: response to touch, apparent in climbing plants and vines

c.Gravitropism: up-and –down growth of plants, responding to Earth’s gravitational pull (auxins play a role here)

d.Rapid responses: adaptations that help to protect plants from predators (venues fly trap)

e.Photoperiodism: taking signals from the changing lengths of day and night throughout the year (example: deciduous trees-chlorophyll)
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2. Plants can respond to light, touch, gravity, and seasonal changes
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Cross Academy :: Honors Biology :: Mrs. St. Clair :: Ch. 22- Plant Growth, Reproduction, and Response :: 22.5- Plant Hormones and Responses-
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