The slow vacuolar (SV) channel was the first tonoplast channel to be characterized. The channel is ubiquitous in most higher plants and it is an essential element in most cells. SV channel has a strong calcium dependence, and the SV current would increase with the increase of free cytoscolic Ca2+ concentration. Since Mg2+ and Ca2+ belong to the same main group and cytosolic Ca2+ can activative SV channel, can cytosolic Mg2+ activative it? Some people think that Mg2+ can activative SV channel; ot...