title: Light regulation of stomatal movement.
abstract: Stomatal pores, each surrounded by a pair of guard cells, regulate CO2 uptake and water loss from leaves. Stomatal opening is driven by the accumulation of K+ salts and sugars in guard cells, which is mediated by electrogenic proton pumps in the plasma membrane and/or metabolic activity. Opening responses are achieved by coordination of light signaling, light-energy conversion, membrane ion transport, and metabolic activity in guard cells. In this review, we focus on recent progress in blue- and red-light-dependent stomatal opening. Because the blue-light response of stomata appears to be strongly affected by red light, we discuss underlying mechanisms in the interaction between blue-light signaling and guard cell chloroplasts.
authors.affiliation: Department of Biology, Faculty of Science, Kyushu University, Ropponmatsu, Fukuoka 810-8560, Japan. kenrcb@mbox.nc.kyushu-u.ac.jp
authors.forename: Ken-ichiro
authors.initials: K
authors.lastname: Shimazaki
authors.forename: Michio
authors.initials: M
authors.lastname: Doi
authors.forename: Sarah M
authors.initials: SM
authors.lastname: Assmann
authors.forename: Toshinori
authors.initials: T
authors.lastname: Kinoshita
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism / Q000502:physiology / Q000528:radiation effects*; D017136:Ion Transport; D008027:Light; D008954:Models, Biological; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism / Q000502:physiology; D059828:Plant Cells; D010940:Plant Proteins / Q000378:metabolism / Q000502:physiology; D010944:Plants / Q000378:metabolism / Q000528:radiation effects*; D011188:Potassium / Q000378:metabolism; D017494:Proton Pumps / Q000378:metabolism / Q000528:radiation effects; D015398:Signal Transduction / Q000187:drug effects / Q000528:radiation effects
chemical_list: D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins; D017494:Proton Pumps; D000040:Abscisic Acid; D011188:Potassium