Plant Cell Biology: UVA on Guard

Current Biology : CB
Carl K-Y Ng

Abstract

Stomata are pores on the surfaces of leaves that function to regulate loss of water for cooling while at the same time facilitating the uptake of carbon dioxide for photosynthesis. A new study shows how stomatal guard cells can sense ultraviolet-A radiation via cGMP signalling to inhibit the opening of these pores in order to reduce transpirational water loss in the short-term.

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