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Calcium uptake by plant cells--channels and pumps acting in concert
H Miedema1, J H Bothwell, C Brownlee
1Dept of Plant Sciences, University of Cambridge, Downing Street, CB2 3EA, Cambridge, UK.
Trends in Plant Science
|November 10, 2001
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.