A Raf-like protein kinase BHP mediates blue light-dependent stomatal opening.

ABSTRACT: Stomata in the plant epidermis open in response to blue light and affect photosynthesis and plant growth by regulating CO₂ uptake and transpiration. In stomatal guard cells under blue light, plasma membrane H⁺-ATPase is phosphorylated and activated via blue light-receptor phototropins and a signaling mediator BLUS1, and H⁺-ATPase activation drives stomatal opening. However, details of the signaling between phototropins and H⁺-ATPase remain largely unknown. In this study, through a screening of specific inhibitors for the blue light-dependent H⁺-ATPase phosphorylation in guard cells, we identified a Raf-like protein kinase, BLUE LIGHT-DEPENDENT H⁺-ATPASE PHOSPHORYLATION (BHP). Guard cells in the bhp mutant showed impairments

SUBMITTER: Hayashi M 

PROVIDER: S-EPMC5372365 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature