Cytosolic Ca(2+) ([Ca(2+)](cyt)) mediates diverse cellular responses in both animal and plant cells in response to various stimuli. Calcium oscillation amplitude and frequency control gene expression. In stomatal guard cells, [Ca(2+)](cyt) has been shown to regulate stomatal movements, and a defined window of Ca(2+) oscillation kinetic parameters encodes necessary information for long-term stomatal movements.
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