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

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

• 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.

• response to gravity

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

via 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

• 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