differential growth

Robinson, Dr. David drobinson at BELLARMINE.EDU
Tue Oct 13 09:39:42 EST 1998

Dandelion flower stalks (scapes) will bend upwards pretty rapidly if you
fasten them down horizontally.   
                                    D. Robinson, Bellarmine College

	>Dear Colleagues,
	>Does anyone have a good physical demonstration of how unequal
growth in a
	>stem can result in growth towards or away from something?  I have
	>pictures, but I was trying to come up with some analogy, or demo,
	>shows clearly how such unequal growth can cause bending in the
	>response, or in twining for vines.
	>Thanks for any ideas you have.  Again, I'm looking for a physical
or visual
	>demo, not a static, 2-D picture.
	>Kath Archer
	Dr. Cynthia M. Galloway
	Assoc. Professor of Biology
	Dept. of Biology
	Campus Box 158
	Texas A&M University
	Kingsville, TX 78363


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