Shaping the calcium signature

Summary In numerous plant signal transduction pathways, Ca 2+ is a versatile second messenger which controls the activation of many downstream actions in response to various stimuli. There is strong evidence to indicate that information encoded within these stimulus‐induced Ca 2+ oscillations can provide signalling specificity. Such Ca 2+ signals, or ‘Ca 2+ signatures’, are generated in the cytosol, and in noncytosolic locations including the nucleus and chloroplast, through the coordinated action of Ca 2+ influx and efflux pathways. An increased understanding of the functions and regulation of these various Ca 2+ transporters has improved our appreciation of the role these transporters play in specifically…