HKT transporter-mediated salinity resistance mechanisms in Arabidopsis and monocot crop plants.
HKT transporter-mediated salinity resistance mechanisms in Arabidopsis and monocot crop plants.
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DOI:
10.1016/j.tplants.2009.08.009
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发表时间:
2009-12
影响因子:
20.5
通讯作者:
Schroeder, Julian I.
中科院分区:
文献类型:
--
作者:
Horie, Tomoaki;Hauser, Felix;Schroeder, Julian I.
The salinization of irrigated lands is increasingly detrimental to plant biomass production and agricultural productivity as most plant species are sensitive to high concentrations of sodium (Na+), which causes combined Na+ toxicity and osmotic stress. Plants have multiple Na+ transport systems to circumvent Na+ toxicity. Essential physiological functions of major Na+ transporters and their mechanisms mediating salinity resistance have been identified in Arabidopsis, including the SOS1, AtNHX and AtHKT1;1 transporters. As we discuss here, recent studies have demonstrated that a class of xylem–parenchyma-expressed Na+-permeable plant HKT transporters represent a primary mechanism mediating salt tolerance and Na+ exclusion from leaves in Arabidopsis, and that major salt tolerance QTL in monocot crop plants are also based on this HKT-mediated mechanism. Sodium toxicity and salt tolerance in plants
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