Abstract
Stomatal pores, each surrounded by a pair of guard cells, regulate CO2 uptake and water loss from leaves. Stomatal opening is driven by the accumulation of K+ salts and sugars in guard cells, which is mediated by electrogenic proton pumps in the plasma membrane and/or metabolic activity. Opening responses are achieved by coordination of light signaling, light-energy conversion, membrane ion transport, and metabolic activity in guard cells. In this review, we focus on recent progress in blue- and red-light-dependent stomatal opening. Because the blue-light response of stomata appears to be strongly affected by red light, we discuss underlying mechanisms in the interaction between blue-light signaling and guard cell chloroplasts.
Publication types
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Research Support, U.S. Gov't, Non-P.H.S.
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Review
MeSH terms
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Abscisic Acid / metabolism
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Chloroplasts / metabolism
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Chloroplasts / physiology
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Chloroplasts / radiation effects*
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Ion Transport
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Light*
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Models, Biological*
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Photosynthetic Reaction Center Complex Proteins / metabolism
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Photosynthetic Reaction Center Complex Proteins / physiology
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Plant Cells
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Plant Proteins / metabolism
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Plant Proteins / physiology
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Plants / metabolism
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Plants / radiation effects*
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Potassium / metabolism
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Proton Pumps / metabolism
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Proton Pumps / radiation effects
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Signal Transduction / drug effects
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Signal Transduction / radiation effects
Substances
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Photosynthetic Reaction Center Complex Proteins
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Plant Proteins
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Proton Pumps
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Abscisic Acid
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Potassium