Stomatal closure in groups

Topography of Photosynthetic Activity of Leaves Obtained from Video Images of Chlorophyll Fluorescence

by Daley P. F., Raschke K., Ball J. T., Berry J. A. (1989)

In Plant Physiol. 90: 1233-1238 –

https://www.academia.edu/37479199/Topography_of_Photosynthetic_Activity_of_Leaves_Obtained_from_Video_Images_of_Chlorophyll_Fluorescence

Abstract