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| plant_movement [2008-05-27 13:55] – created nik | plant_movement [2008-05-29 09:47] – nik | ||
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| + | ===Plant hormones=== | ||
| + | There are five general classes of hormones: auxins, cytokinins, gibberellins, | ||
| + | ==== Types of Movement ==== | ||
| ===Phototropism=== | ===Phototropism=== | ||
| * movement in response to light. | * movement in response to light. | ||
| * shoots grow toward light and are positively phototropic; | * shoots grow toward light and are positively phototropic; | ||
| - | * auxin increase in shaded side -> plant curve toward light | + | * IAA increase in shaded side -> plant curve toward light |
| * wavelengths less than 500μm—is most effective in producing a growth response. | * wavelengths less than 500μm—is most effective in producing a growth response. | ||
| Line 14: | Line 17: | ||
| * IAA (lengthening) and ethylene (contracting) are probably involved | * IAA (lengthening) and ethylene (contracting) are probably involved | ||
| + | ==== Reading / / Notes ==== | ||
| + | * {{wp> | ||
| + | * "The Power of Movement in Plants" | ||
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