Light regulation of stomatal movement.
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.
Shimazaki
Ken-ichiro
K
Department of Biology, Faculty of Science, Kyushu University, Ropponmatsu, Fukuoka 810-8560, Japan. kenrcb@mbox.nc.kyushu-u.ac.jp
Doi
Michio
M
Assmann
Sarah M
SM
Kinoshita
Toshinori
T
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
D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins; D017494:Proton Pumps; D000040:Abscisic Acid; D011188:Potassium