title: Diverse stomatal signaling and the signal integration mechanism.
abstract: Guard cells perceive a variety of chemicals produced metabolically in response to abiotic and biotic stresses, integrate the signals into reactive oxygen species and calcium signatures, and convert these signatures into stomatal movements by regulating turgor pressure. Guard cell behaviors in response to such complex signals are critical for plant growth and sustenance in stressful, ever-changing environments. The key open question is how guard cells achieve the signal integration to optimize stomatal aperture. Abscisic acid is responsible for stomatal closure in plants in response to drought, and its signal transduction has been well studied. Other plant hormones and low-molecular-weight compounds function as inducers of stomatal closure and mediators of signaling in guard cells. In this review, we summarize recent advances in research on the diverse stomatal signaling pathways, with specific emphasis on signal integration and signal interaction in guard cell movement.
authors: Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan; email: muta@cc.okayama-u.ac.jp , smunemasa@cc.okayama-u.ac.jp.
authors: Yoshiyuki
authors: Y
authors: Murata
authors: Izumi C
authors: IC
authors: Mori
authors: Shintaro
authors: S
authors: Munemasa
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D000222:Adaptation, Physiological; D002118:Calcium / Q000378:metabolism; D055864:Droughts; D059828:Plant Cells / Q000378:metabolism* / Q000502:physiology; D010937:Plant Growth Regulators / Q000378:metabolism*; D054046:Plant Stomata / Q000378:metabolism* / Q000502:physiology; D010944:Plants / Q000378:metabolism*; D017382:Reactive Oxygen Species / Q000378:metabolism; D015398:Signal Transduction; D013312:Stress, Physiological; D014867:Water / Q000502:physiology
chemical_list: D010937:Plant Growth Regulators; D017382:Reactive Oxygen Species; D014867:Water; D000040:Abscisic Acid; D002118:Calcium
keywords: abiotic stress; biotic stress; calcium; guard cell; reactive oxygen species