文献类型： 外文期刊
作者： Wang, Hongyan 1 ; Ding, Qiang 1 ; Shao, Hongbo 2 ; Wang, Honglei 1 ;
作者机构： 1.China Agr Univ, Yantai Inst, Yantai 264670, Peoples R China
2.Jiangsu Acad Agr Sci, Salt Soil Agr Ctr, Inst Agr Resources & Environm, Zhongling St 50, Nanjing 210014, Jiangsu, Peoples R China
3.Yancheng Teachers Univ, Jiangsu Synthet Innovat Ctr Coastal Bioagr, Jiangsu Key Lab Bioresources Saline Soils, Yancheng 224002, Peoples R China
关键词： Proline accumulation; Salt tolerance; KvP5CS1; Transgenic tobacco; Kosteletzkya virginia
期刊名称：PAKISTAN JOURNAL OF BOTANY （ 影响因子：0.972； 五年影响因子：0.988 ）
ISSN： 0556-3321
年卷期： 2019 年 51 卷 3 期
页码：
收录情况： SCI
摘要： Proline is a generally accumulated osmolytes in plants under salt stress. Overexpressing P5CS gene for more proline production is considered as an effective strategy to improve plant salt tolerance. In this study, KvP5CS1 was cloned from a halophyte Kosteletzkya virginica and transferred to the genome of tobacco (NC89) by Agrobacterium-mediated method. Under normal condition, there is no obvious difference in the growth, chlorophyll and proline content, malondialdehyde (MDA) content, superoxide dismutase (SOD) and peroxidase (POD) activity between wild-type (WT) and transgenic seedlings, except that catalase (CAT) activity in wild type was lower than that in transgenic seedlings. However, after treatment by 200 mM NaCl stress for 14 days, transgenic seedlings grew better and showed higher levels of chlorophyll and proline, stronger antioxidant enzyme activities, lower level of malondialdehyde (MDA) than wild type seedlings. These results suggested that overexpression of KvP5CS1 resulted in proline accumulation, stronger antioxidant capacity and increased salt tolerance in transgenic tobacco, indicating KvP5CS1 was involved in plant salt tolerance and might be a promising gene to breed salt-tolerant crops growing in salinized farmlands and coastal lands.
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