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Higher endogenous bioactive gibberellins and alpha-amylase activity confer greater tolerance of rice seed germination to saline-alkaline stress

文献类型：期刊论文

作者Li, Qian; Yang, An; Zhang, Wen-Hao
刊名ENVIRONMENTAL AND EXPERIMENTAL BOTANY
出版日期2019
卷号162页码:357-363
关键词Seed germination Bioactive gibberellins alpha-amylase activity Rice (oryza saliva L.) Saline-Alkaline stress
ISSN号0098-8472
DOI10.1016/j.envexpbot.2019.03.015
文献子类Article
英文摘要Seed germination is the most critical phase in plant life cycle and sensitive to saline-alkaline stress. However, few studies have investigated the mechanisms by which rice seeds respond and tolerate to saline-alkaline stress. We explored physiological and molecular mechanisms underlying tolerance to saline-alkaline stress during seed germination using two rice genotypes (Dongdao-4 and Jigeng-88) differing in their tolerance to saline-alkaline stress. Seed germination in Dongdao-4 rice was less inhibited by saline-alkaline stress than Jigeng-88 rice, as evidenced by higher ratio of seed germination rate between saline-alkaline stress and control in Dongdao-4 than that in Jigeng-88. Higher endogenous concentrations of gibberellins (GA(1) and GA(4)) and greater expression levels of GA biosynthetic genes and lower expression levels of genes involved in inactivation of GAs in Dongdao-4 than in Jigeng-88 seeds were observed when challenged by saline-alkaline stress, suggesting that a higher concentration of bioactive GAs may underpin the greater tolerance of Dongdao-4 to saline-alkaline stress than that of Jigeng-88. We further demonstrated that exogenous application of GA and GA biosynthetic inhibitors enhanced and suppressed seed germination under conditions of saline-alkaline stress, respectively. Moreover, we demonstrated a higher activity of alpha-amylase in Dongdao-4 than in Jigeng-88 seeds under saline-alkaline stress. These findings highlight that a greater amount of endogenous bioactive GAs and a higher activity of alpha-amylase in seeds may account for the greater tolerance of Dongdao-4 to saline-alkaline stress during seed germination.
学科主题Plant Sciences ; Environmental Sciences
出版地OXFORD
电子版国际标准刊号1873-7307
WOS关键词ORYZA-SATIVA ; ABSCISIC-ACID ; L. SEEDLINGS ; SALT STRESS ; GROWTH ; METABOLISM ; EXPRESSION ; PHOTOSYNTHESIS ; BIOSYNTHESIS ; INHIBITION
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000467507700035
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31801280] ; Scientific Startup Foundation for Doctors of Northwest AF University [2452018114]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/19419]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Northwest A&F Univ, Coll Hort, Yangling 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Li, Qian,Yang, An,Zhang, Wen-Hao. Higher endogenous bioactive gibberellins and alpha-amylase activity confer greater tolerance of rice seed germination to saline-alkaline stress[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2019,162:357-363.
APA Li, Qian,Yang, An,&Zhang, Wen-Hao.(2019).Higher endogenous bioactive gibberellins and alpha-amylase activity confer greater tolerance of rice seed germination to saline-alkaline stress.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,162,357-363.
MLA Li, Qian,et al."Higher endogenous bioactive gibberellins and alpha-amylase activity confer greater tolerance of rice seed germination to saline-alkaline stress".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 162(2019):357-363.

入库方式： OAI收割

来源：植物研究所

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