▪ Abstract The calcium ion is firmly established as a ubiquitous intracellular second messenger in plants. At their simplest, Ca 2+ -based signaling systems are composed of a receptor, a system for generating the increase in Ca 2+ cyt , downstream components that are capable of reacting to the increase in Ca 2+ cyt , and other cellular systems responsible for returning Ca 2+ cyt to its prestimulus level. Here we review the various mechanisms responsible for generating the stimulus-induced increases in Ca 2+ cyt known as Ca 2+ signals. We focus particularly on the mechanisms responsible for generating Ca 2+ cyt oscillations and transients and use Nod Factor signaling in legume root hairs and stimulus-response coupling in guard cells to assess the physiological significance of these classes of Ca 2+ signals.
Annual Review of Plant Biology – Annual Reviews
Published: Jun 2, 2004
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