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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Co-expression of the Arabidopsis SOS genes enhances salt tolerance in transgenic tall fescue (Festuca arundinacea Schreb.)
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Co-expression of the Arabidopsis SOS genes enhances salt tolerance in transgenic tall fescue (Festuca arundinacea Schreb.)

机译：拟南芥SOS基因的共表达增强了转基因高羊茅（Festuca arundinacea Schreb。）的耐盐性

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摘要

Crop productivity is greatly affected by soil salinity; therefore, improvement in salinity tolerance of crops is a major goal in salt-tolerant breeding. The Salt Overly Sensitive(SOS) signal-transduction pathway plays a key role in ion homeostasis and salt tolerance in plants. Here, we report that overexpression of Arabidopsis thaliana SOS1+SOS2+SOS3 genes enhanced salt tolerance in tall fescue. The transgenic plants displayed superior growth and accumulated less Na+ and more K~+ in roots after 350 mM NaCl treatment. Moreover, Na~+ enflux, K~+ influx, and Ca~(2+) influx were higher in the transgenic plants than in the wild-type plants. The activities of the enzyme superoxide dismutase, peroxidase, catalase, and proline content in the transgenic plants were significantly increased; however, the malondialdehyde content decreased in transgenic plants compared to the controls. These results suggested that co-expression of A. thaliana SOS1+SOS2+SOS3 genes enhanced the salt tolerance in transgenic tall fescue.
机译：盐分极大地影响了作物的生产力;因此，提高作物的耐盐性是耐盐育种的主要目标。盐分过高敏感（SOS）信号转导途径在植物体内离子稳态和耐盐性中起着关键作用。在这里，我们报告说拟南芥SOS1 + SOS2 + SOS3基因的过表达增强了高羊茅的耐盐性。转基因植物在350 mM NaCl处理后显示出优异的生长，并且在根部积累较少的Na +和更多的K〜+。此外，转基因植物中的Na〜+流入量，K〜+流入量和Ca〜（2+）流入量高于野生型植物。转基因植物中的超氧化物歧化酶，过氧化物酶，过氧化氢酶和脯氨酸的活性显着增加。然而，与对照相比，转基因植物中丙二醛含量降低。这些结果表明拟南芥SOS1 + SOS2 + SOS3基因的共表达增强了转基因羊茅中的耐盐性。

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