Calcium uptake by plant cells – channels and pumps acting in concert

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• 作者：Miedema ; Henk ; Bothwell ; John H.F. ; Brownlee ; Colin ; Davies ; Julia M.
• 关键词：proton pump ; Ca²⁺ unptake ; channel ; membrane potential ; proton pump ; Plant Science ; Biochemistry ; Cell biology
• 刊名：Trends in Plant Science
• 出版年：2001
• 出版时间：November 1, 2001
• 年：2001
• 卷：6
• 期：11
• 页码：514-519
• 全文大小：104 K

文摘

How do plant cells accomplish a net uptake of Ca²⁺ 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 Ca²⁺ uptake whereas the other could be limited to a signalling function.