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plant_movement [2008-05-27 13:55] – nik | plant_movement [2008-05-29 17:52] – 81.188.78.24 | ||
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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 & IAA 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. | ||
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* eg. tendrils of climbing plants wrapping around a support | * eg. tendrils of climbing plants wrapping around a support | ||
* IAA (lengthening) and ethylene (contracting) are probably involved | * IAA (lengthening) and ethylene (contracting) are probably involved | ||
+ | |||
+ | === Other ==== | ||
+ | via [[WP> | ||
+ | * Chemotropism, | ||
+ | * Gravitropism (or geotropism), | ||
+ | * Apogeotropism, | ||
+ | * Hydrotropism, | ||
+ | * Heliotropism, | ||
+ | * Selenotropism, | ||
+ | * Scototropism, | ||
+ | * Phototropism, | ||
+ | * Thermotropism, | ||
+ | * Thigmotropism, | ||
+ | * Autotropism, | ||
+ | |||
+ | ==== Reading / / Notes ==== | ||
+ | * [[wp> | ||
+ | * "The Power of Movement in Plants" | ||
+ | * Roger P. Hangarter' | ||
+ | * Roger P. Hangarter & Dennis DeHart - Slow Life: http:// | ||