Comparative studies on tolerance of rice genotypes differing in their tolerance to moderate salt stress

doi:10.1093/jpe/rtw065

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	Comparative studies on tolerance of rice genotypes differing in their tolerance to moderate salt stress
	Li, Qian ; Yang, An ; Zhang, Wen-Hao
刊名	BMC PLANT BIOLOGY
	2017
卷号	17
关键词	Dongdao-4 Osmotic regulation ROS detoxifying mechanism Jigeng-88 Oryza sativa L. Rice Moderate salt stress
ISSN号	1471-2229
DOI	10.1093/jpe/rtw065
文献子类	Article
英文摘要	Background: Moderate salt stress, which often occurs in most saline agriculture land, suppresses crop growth and reduces crop yield. Rice, as an important food crop, is sensitive to salt stress and rice genotypes differ in their tolerance to salt stress. Despite extensive studies on salt tolerance of rice, a few studies have specifically investigated the mechanism by which rice plants respond and tolerate to moderate salt stress. Two rice genotypes differing in their tolerance to saline-alkaline stress, Dongdao-4 and Jigeng-88, were used to explore physiological and molecular mechanisms underlying tolerance to moderate salt stress. Results: Dongdao-4 plants displayed higher biomass, chlorophyll contents, and photosynthetic rates than Jigeng-88 under conditions of salt stress. No differences in K+ concentrations, Na+ concentrations and Na+/K+ ratio in shoots between Dongdao-4 and Jigeng-88 plants were detected when challenged by salt stress, suggesting that Na+ toxicity may not underpin the greater tolerance of Dongdao-4 to salt stress than that of Jigeng-88. We further demonstrated that Dongdao-4 plants had greater capacity to accumulate soluble sugars and proline (Pro) than Jigeng-88, thus conferring greater tolerance of Dongdao-4 to osmotic stress than Jigeng-88. Moreover, Dongdao-4 suffered from less oxidative stress than Jigeng-88 under salt stress due to higher activities of catalase (CAT) in Dongdao-4 seedlings. Finally, RNA-seq revealed that Dongdao-4 and Jigeng-88 differed in their gene expression in response to salt stress, such that salt stress changed expression of 456 and 740 genes in Dongdao-4 and Jigeng-88, respectively. Conclusion: Our results revealed that Dongdao-4 plants were capable of tolerating to salt stress by enhanced accumulation of Pro and soluble sugars to tolerate osmotic stress, increasing the activities of CAT to minimize oxidative stress, while Na+ toxicity is not involved in the greater tolerance of Dongdao-4 to moderate salt stress.
学科主题	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
出版地	LONDON
WOS关键词	EXPRESSION PROFILES ; SALINITY TOLERANCE ; ABIOTIC STRESSES ; GENE ; RESPONSES ; PROLINE ; PHOTOSYNTHESIS ; ARABIDOPSIS ; RESISTANCE ; REDUCTASE
语种	英语
出版者	BMC
WOS记录号	WOS:000397126800012
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) ; Chinese Academy of SciencesChinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/22315]
专题	植被与环境变化国家重点实验室
作者单位	1.[Li, Qian 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Beijing Inst Life Sci, Res Network Global Change Biol, Beijing 100093, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Yang, An
推荐引用方式 GB/T 7714	Li, Qian,Yang, An,Zhang, Wen-Hao. Comparative studies on tolerance of rice genotypes differing in their tolerance to moderate salt stress[J]. BMC PLANT BIOLOGY,2017,17.
APA	Li, Qian,Yang, An,&Zhang, Wen-Hao.(2017).Comparative studies on tolerance of rice genotypes differing in their tolerance to moderate salt stress.BMC PLANT BIOLOGY,17.
MLA	Li, Qian,et al."Comparative studies on tolerance of rice genotypes differing in their tolerance to moderate salt stress".BMC PLANT BIOLOGY 17(2017).