Sprout something fast growing and place in very directional light.
Turn a rapidly-growing plant on its side and let the stem reorient itself
Drag in anything with tendrils and let them watch as, over a couple of days,
unwound tendrils coil tightly when they encounter anything
M. Reed
>> 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 2-D
>> pictures, but I was trying to come up with some analogy, or demo, that
>> shows clearly how such unequal growth can cause bending in the phototropic
>> 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
>>
