time lapse: protective leaf movements of oxalis acetosella

this short time lapse clip shows nastic leaf movements of oxalis acetosella, which are triggered by sudden direct sunlight.
on the base of each of three leaflets, turgor controlled pulvinar cells function as a hinge to increase or decrease the leaf angle of the leaflets. such protective leaf movements can be triggered by a number of exogenous factors such as light (photonasty), temperature (thermonasty) but also by internal
factors.

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• time lapse
• timelapse
• oxalis
• acetosella
• light
• plants
• botany
• biology
• nastic
• leaf movement
• photoinhibition
• nasty