Dietrich P (2005)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2005
Book Volume: 46
Pages Range: 1682-1689
Journal Issue: 10
DOI: 10.1093/pcp/pci184
Voltage-dependent inward-rectifying (K) and outward-rectifying (K) K channels are capable of mediating K fluxes across the plasma membrane. Previous studies on guard cells or heterologously expressed K channels provided evidence for the requirement of ATP to maintain K channel activity. Here, the nucleotide and Mg dependencies of time-dependent K and K channels from maize subsidiary cells were examined, showing that MgATP as well as MgADP function as channel activators. In addition to K channels, these studies revealed the presence of another outward-rectifying channel type (MgC) in the plasma membrane that however gates in a nucleotide-independent manner. MgC represents a new channel type distinguished from K(out) channels by fast activation kinetics, inhibition by elevated intracellular Mg concentration, permeability for K as well as for Na and insensitivity towards TEA . Similar observations made for guard cells from Zea mays and Vicia faba suggest a conserved regulation of channel-mediated K and Na transport in both cell types and species. JSPP © 2005.
APA:
Dietrich, P. (2005). Nucleotides and Mg2+ ions differentially regulate K+ channels and non-selective cation channels present in cells forming the stomatal complex. Plant and Cell Physiology, 46(10), 1682-1689. https://dx.doi.org/10.1093/pcp/pci184
MLA:
Dietrich, Petra. "Nucleotides and Mg2+ ions differentially regulate K+ channels and non-selective cation channels present in cells forming the stomatal complex." Plant and Cell Physiology 46.10 (2005): 1682-1689.
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