Fatty acid desaturase-6 (Fad6) is required for salt tolerance in Arabidopsis thaliana
Fatty acid desaturase-6 (Fad6) is required for salt tolerance in Arabidopsis thaliana
复制标题
拟南芥耐盐性需要脂肪酸去饱和酶 6 (Fad6)
DOI：
10.1016/j.bbrc.2009.09.095
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发表时间：
2009-12-18
影响因子：
3.1
通讯作者：
Zhang, Hong-Xia
中科院分区：
文献类型：
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作者：
Zhang, Jian-Tao;Zhu, Jin-Qi;Zhang, Hong-Xia
脂肪酸去饱和酶在植物对低温、高温、干旱、渗透胁迫等非生物胁迫的应答中起着重要作用。在这项工作中，我们提供的证据表明，Fad6，叶绿体去饱和酶，所需的耐盐性在早期幼苗发育的拟南芥。Fad6的表达对盐和渗透胁迫有响应。与野生型相比，fad6突变体对盐胁迫的耐受性降低，在高盐胁迫下Na+积累量增加，K+积累量减少。此外，细胞的氧化损伤更严重，在fad6处理时，高浓度的NaCl，增加电解质渗漏率和丙二醛的产生，以及抗氧化酶的活性降低。所有这些结果表明Fad6是拟南芥抗盐所必需的。(C)2009 Elsevier Inc. All rights reserved.
Fatty acid desaturases play important role in plant responses to abiotic stresses including cold, high temperature, drought, and osmotic stress. In this work, we provide the evidence that Fad6, a chloroplast desaturase, is required for salt tolerance during the early seedling development of Arabidopsis. Expression of Fad6 was responsive to salt and osmotic stress. Compared with the wild-type plants, the fad6 mutant showed reduced tolerance to salt stress, and accumulated more Na+ and less K+ under high NaCl stress condition. Furthermore, cellular oxidative damage was more severe in fad6 when treated with high concentrations of NaCl, as indicated by increased electrolyte leakage rate and malondialdehyde production, as well as by decreased activities of anti-oxidative enzymes. All these results suggest that Fad6 is required for salt resistance in Arabidopsis. (C) 2009 Elsevier Inc. All rights reserved.