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Blue light and CO2 signals converge to regulate light-induced stomatal opening.
- Source :
- Nature Communications; 11/3/2017, Vol. 8 Issue 1, p1-13, 13p
- Publication Year :
- 2017
-
Abstract
- Stomata regulate gas exchange between plants and atmosphere by integrating opening and closing signals. Stomata open in response to low CO<subscript>2</subscript> concentrations to maximize photosynthesis in the light; however, the mechanisms that coordinate photosynthesis and stomatal conductance have yet to be identified. Here we identify and characterize CBC1/2 (CONVERGENCE OF BLUE LIGHT (BL) AND CO<subscript>2</subscript> 1/2), two kinases that link BL, a major component of photosynthetically active radiation (PAR), and the signals from low concentrations of CO<subscript>2</subscript> in guard cells. CBC1/CBC2 redundantly stimulate stomatal opening by inhibition of S-type anion channels in response to both BL and low concentrations of CO<subscript>2</subscript>. CBC1/CBC2 function in the signaling pathways of phototropins and HT1 (HIGH LEAF TEMPERATURE 1). CBC1/CBC2 interact with and are phosphorylated by HT1. We propose that CBCs regulate stomatal aperture by integrating signals from BL and CO<subscript>2</subscript> and act as the convergence site for signals from BL and low CO<subscript>2</subscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 8
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 138016417
- Full Text :
- https://doi.org/10.1038/s41467-017-01237-5