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

doi:10.1016/j.envexpbot.2019.03.015

	Higher endogenous bioactive gibberellins and alpha-amylase activity confer greater tolerance of rice seed germination to saline-alkaline stress
	Li, Qian ; Yang, An ; Zhang, Wen-Hao
	2019
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	162 页码:357-363
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.
关键词	Seed germination Bioactive gibberellins alpha-amylase activity Rice (oryza saliva L.) Saline-Alkaline stress
学科领域	Plant Sciences ; Environmental Sciences
DOI	10.1016/j.envexpbot.2019.03.015
收录类别	SCI
语种	英语
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
WOS记录号	WOS:000467507700035
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-7307
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]
作者邮箱	anyang@ibcas.ac.cn ; whzhang@ibcas.ac.cn
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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.Northwest A&F Univ, Coll Hort, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, 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.

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