Co-expression of the Arabidopsis SOS genes enhances salt tolerance in transgenic tall fescue (Festuca arundinacea Schreb.).
Co-expression of the Arabidopsis SOS genes enhances salt tolerance in transgenic tall fescue (Festuca arundinacea Schreb.).
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DOI：
10.1007/s00709-013-0540-9
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发表时间：
2014-01
期刊：
影响因子：
2.9
通讯作者：
Xu, Xing
中科院分区：
文献类型：
--
作者：
Ma, Dong-Mei;Xu, Wei-Rong;Li, Hui-Wen;Jin, Feng-Xia;Guo, Ling-Na;Wang, Jing;Dai, Hong-Jun;Xu, Xing
土壤盐分对作物产量的影响很大；因此，提高作物的耐盐性是耐盐育种的主要目标。盐过度敏感（SOS）信号转导通路在植物离子稳态和耐盐性中起关键作用。本文报道了拟南芥SOS1+SOS2+SOS3基因的过表达增强了高羊茅的耐盐性。350 mM NaCl处理后，转基因植株表现出较好的生长特性，根系积累Na+较少，K+较多。此外，转基因植株的Na+内流、K+内流和Ca2+内流均高于野生型植株。转基因植株的超氧化物歧化酶、过氧化物酶、过氧化氢酶活性和脯氨酸含量显著提高；然而，与对照相比，转基因植株的丙二醛含量有所下降。这些结果表明，拟南芥SOS1+SOS2+SOS3基因的共表达增强了转基因高羊茅的耐盐性。本文的在线版本（doi:10.1007/s00709-013-0540-9）包含补充材料，仅供授权用户使用。
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 Ca2+ 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. The online version of this article (doi:10.1007/s00709-013-0540-9) contains supplementary material, which is available to authorized users.
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