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Sucrose Transporter Gene AtSUC4 Regulates Sucrose Distribution and Metabolism in Response to Salt Stress in Arabidopsis Thaliana

机译:蔗糖转运蛋白基因Atsuc4调节蔗糖分布和代谢以应对拟南芥盐胁迫

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Sporadic reports indicated that salt stress induced the expression of sucrose transporter genes, and sucrose transporters (SUCs or SUTs) as the important carriers are responsible for the loading, unloading and distribution of sucrose, but the study that SUCs are involved in sucrose distribution and metabolism under salt stress at the whole-plant level has not been reported to date. AtSUC4, as the unique member of low affinity/high capacity SUT4-clade in Arabidopsis thaliana, may play an important role in plant stress tolerance. Here, through analyzing two homozygous mutation lines of AtSUC4 (Atsuc4-1 and Atsuc4-2), we found salt stress induced higher sucrose, fructose and glucose content in shoots and lower sucrose, fructose and glucose content in roots of these mutants compared with the wild-type (WT), resulting in an imbalance of sucrose distribution and fructose and glucose accumulation changes of sucrose metabolites at the whole-plant level. Our results indicated that AtSUC4 is involved in salt stress tolerance by the regulation of sucrose distribution and metabolism.
机译:零星报道表明,随着重要载体的负责,卸载和分布蔗糖,盐应激诱导蔗糖转运蛋白基因的表达,蔗糖转运蛋白(Sucs或Suts)表达,但Sucs参与蔗糖分布和代谢的研究迄今尚未报告全植物水平的盐胁迫下。 Atsuc4,作为拟南芥的低亲和力/高容量Sut4-Clade的独特成员,可能在植物胁迫耐受性中发挥重要作用。在这里,通过分析ATSUC4(ATSUC4-1和ATSUC4-2)的两个纯合突变线,我们发现盐应激诱导的蔗糖,果糖和葡萄糖含量更高,蔗糖,果糖和葡萄糖含量与这些突变体的根部相比,相比野生型(WT),导致蔗糖分布和果糖的不平衡,蔗糖代谢物在全植物水平上的糖糖和葡萄糖累积变化。我们的结果表明,Atsuc4通过调节蔗糖分布和代谢来涉及盐胁迫耐受性。

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