Ca2+ and phytochrome action in plants.
Red light initiates many important morphogenetic responses in plants through the mediation of the pigment, phytochrome.  How phytochrome promotes photomorphogenesis is unknown.  The evidence that photoactivated phytochrome initiates calcium fluxes in cells is reviewed and how these fluxes could regulate several known red-light induced effects in plants is discussed.
Roux
S J
SJ
Department of Botany, University of Texas at Austin 78712, USA.
D002118:Calcium / Q000378:metabolism / Q000502:physiology*; D002135:Calcium-Binding Proteins / Q000378:metabolism; D000252:Calcium-Transporting ATPases / Q000378:metabolism; D002147:Calmodulin / Q000378:metabolism / Q000502:physiology; D056890:Eukaryota; D007259:Infrared Rays; D008027:Light; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000378:metabolism; D010834:Phytochrome / Q000378:metabolism / Q000502:physiology* / Q000528:radiation effects; D018521:Plant Physiological Phenomena; D010944:Plants; D015398:Signal Transduction / Q000502:physiology* / Q000528:radiation effects
D002135:Calcium-Binding Proteins; D002147:Calmodulin; D010834:Phytochrome; D017853:Phosphotransferases (Alcohol Group Acceptor); C021844:NAD kinase; D000252:Calcium-Transporting ATPases; D002118:Calcium