===Plant hormones===
There are five general classes of hormones: auxins, cytokinins, gibberellins, ethylene, and abscisic acid. for more details see [[plant biology]]



==== Types of Movement ====

"Plants in motion", A great collection of short time lapses showing plants in motion
 http://plantsinmotion.bio.indiana.edu/plantmotion/starthere.html 

===Phototropism===
  * movement in response to light. 
  * shoots grow toward light and are positively phototropic; roots grow away from light and are negatively phototropic. 
  * IAA increase in shaded side -> plant curve toward light
  * wavelengths less than 500μm—is most effective in producing a growth response. 

===Gravitropism===
  * response to gravity

===Thigmotropism===  
  * reaction to a solid object
  * eg. tendrils of climbing plants wrapping around a support
  * IAA (lengthening) and ethylene (contracting) are probably involved

=== Other ====
via [[WP>Tropism]]
  * Chemotropism, movement or growth in response to chemicals
  * Gravitropism (or geotropism), movement or growth in response to gravity
  * Apogeotropism, the inclination to behave contrary to gravity
  * Hydrotropism, movement or growth in response to moisture or water
  * Heliotropism, movement or growth in response to sunlight.
  * Selenotropism, movement or growth in response to the moon.
  * Scototropism, movement or growth towards shadow.
  * Phototropism, movement or growth in response to lights or colors of light
  * Thermotropism, movement or growth in response to temperature
  * Thigmotropism, movement or growth in response to touch or contact
  * Autotropism, inclination of plants to grow in a certain direction or to return to a previous (or is it prior) form

==== Reading / / Notes ====
  * [[wp>Rapid plant movement]]
  * "The Power of Movement in Plants" Charles Darwin's book on phototropism > http://www.gutenberg.org/etext/5605
  * Roger P. Hangarter's research into plant's responses to environmental stimuli: http://www.bio.indiana.edu/%7Ehangarterlab/abstracts/research.html
  * Roger P. Hangarter & Dennis DeHart - Slow Life: http://plantsinmotion.bio.indiana.edu/usbg/ http://dennis4.fatcow.com/lowlife/slowlife_intro.html

  * Movement/growth of roots: http://tomwalk.com/research.htm