Abstract
How do plant cells accomplish a net uptake of Ca(2+) but keep the membrane potential under control? Consideration of the voltage dependence of the depolarization-activated calcium channel and hyperpolarization-activated calcium channel types, and two other major transporters in the plasma membrane, the H(+)-ATPase and I(K,out), suggests that one channel is well suited for both nutritive and signalling Ca(2+) uptake whereas the other could be limited to a signalling function.
MeSH terms
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Arabidopsis / metabolism
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Arabidopsis Proteins
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Calcium / metabolism*
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Calcium Channels / metabolism*
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Ion Pumps / physiology*
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Patch-Clamp Techniques
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Plant Proteins / metabolism
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Potassium Channels / metabolism
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Potassium Channels, Tandem Pore Domain*
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Proton-Translocating ATPases / genetics
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Proton-Translocating ATPases / metabolism
Substances
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Arabidopsis Proteins
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Calcium Channels
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Ion Pumps
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KCO1 protein, Arabidopsis
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Plant Proteins
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Potassium Channels
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Potassium Channels, Tandem Pore Domain
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Proton-Translocating ATPases
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Calcium