Would that not be more attributed to phototropism?
I was imagining some sort of rubber band kind of effect on the tension side, I wonder if anything is happening of the compression side.
Using that search term I found this-...
I've been watching the trees around here in a late spring storm and I've been wondering, how exactly do small trees and tree limbs straighten back out or stand back up after being bent over for several days? What mechanism is at work here? I'd like to have a microscopic x-ray time lapse to see...