Effect of Seawater Stress on Physiological and Biochemical Responses of Five Jerusalem Artichoke Ecotypes

查看全文 作　　者：LONG Xiao-Hua CHI Jin-He LIU Ling LI Qing LIU Zhao-[1]Pu

机构地区：[1]College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China

出　　处：《Pedosphere》索引2009年第19卷第2期,共9页

基　　金：Project Supported by the National Key Project of Scientific and Technical Supporting Programs Funded by Ministry of Science&Technology of China(Nos.2006BAD09A08-03-01 and 2006BAD09A04-05);the National High Technology Research and Development Program(863 Program)of China(No.2007AA091702);the Opening Program of Jiangsu Provincial Key Laboratory of Coastal Wetland Bio-resource and Environmental Protection(JLCBE)(No.JLCBE07001) 摘　　要：Three treatments consisting of 0%,15%,and 30%seawater were investigated to analyse the ecotypic variabilities among five populations of Jerusalem artichoke(Helianthus tuberosus)regarding their responses to seawater stress under a hydroponic culture system.Analyses were done 2,4,and 6 days after treatments.The 15%and 30%seawater treatments reduced the growth rates of roots and shoots of H.tuberosus populations.The activities of superoxide dismutase, peroxidase,and catalase majored in the leaves were stimulated under the seawater stress.The electrolyte leakage and malondialdehyde contents of the leaves were also stimulated owing to seawater stress.The contents of proline and soluble- sugars in the leaves increased significantly with increasing seawater concentrations.The concentrations of Na+,K+,and Cl-in the aerial parts and roots increased with an increase in the seawater concentration throughout the experimental period.There were ecotypic differences among the five populations of H.tuberosus as evidenced by the analyses of the above items in both aerial parts and roots under seawater treatment.The magnitude of the ecotypic variance components indicated that a substantial proportion of the total variation for these physiological and biochemical responses were owing to ecotype,indicating the possibility of improvement through hybridization and selection. 关键词：生理生化反应海水胁迫生态型菊芋超氧化物歧化酶海水浓度经济增长率过氧化氢酶

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Effect of Seawater Stress on Physiological and Biochemical Responses of Five Jerusalem Artichoke Ecotypes

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