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The Role of Atcngc10 and Sos1 in Salt Tolerance of Arabidopsis (Paperback)
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The Role of Atcngc10 and Sos1 in Salt Tolerance of Arabidopsis (Paperback)
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Control of intracellular ion homeostasis is pivotal to plant salt
tolerance. Plants have developed a number of mechanisms to keep
ions at appropriate concentrations. Both transporters and channels
on the plasma membrane play important roles in this function. Plant
cyclic nucleotide-gated channels (CNGCs) in the plasma membrane are
non-selective monovalent and divalent cation channels. So far, most
studies on plant CNGCs have been conducted on heterologous systems.
In planta, reverse genetic studies revealed the role of different
CNGCs in cation uptake, transport and homeostasis. However, there
is little information available about the functional
characteristics of plant CNGCs. Altered K+, Ca2+ and Mg2+ internal
concentrations in AtCNGC10 antisense lines compared with WT plants
under non-salt conditions indicated disturbed long distance ion
transport, especially xylem loading/retrieval and/or phloem
loading. The salt overly sensitive gene (SOS1) encodes the Na+/H+
antiporter in the root-cell plasma membrane. The current study
shows that the SOS1 transporter is involved in H+ influx into the
meristem zone of Arabidopsis roots, or it may function as a Na+/H+
antiporter.
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