wrote:
Directional plant growth responses induced by touch are termed
thigmotropisms. A google.com search on thigmotropism will turn up some
good introductory websites.

The New Phytologist has a 2005 review on plant touch (thigmo-)
responses.

Braam, J. 2005. In touch: Plant responses to mechanical stimuli. New
Phytologist 165: 373-389.

It is available for free online:
http://bioc.rice.edu/~braam/pubs/New...m%20cop y.pdf

Darwin's work on plant thigmo- responses is in the books The Power of
Movement in Plants

http://pages.britishlibrary.net/char...nt/move_fm.htm

and Insectivorous Plants.
http://pages.britishlibrary.net/char.../insect_fm.htm

They are both available
for free online.



--
John S. Wilkins, Postdoctoral Research Fellow, Biohumanities Project
University of Queensland - Blog: evolvethought.blogspot.com
"He used... sarcasm. He knew all the tricks, dramatic irony, metaphor, bathos,
puns, parody, litotes and... satire. He was vicious."