Effects of cadmium stress on seed germination and seedling growth of Elymus dahuricus infected with the Neotyphodium endophyte

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外文摘要：Various cadmium (Cd) concentrations (0,50,100,200 and 300 μmol L-1) affected Elymus dahuricus seed germination,seedling growth,antioxidative enzymes activities (AEA),and amounts of malondialdehyde (MDA) and proline present.These influences were determined for separate E.dahuricus cohorts known to be either infected (E+) or non-infected (E-) by a Neotyphodium endophyte.Under high Cd concentrations (100,200 and 300 tmol L-1),E+ specimens showed a significantly (P＜0.05) higher germination rate and index,as well as higher values for shoot length,root length and dry biomass.However,the germination rate and index,root length and dry weight did not show a significant (P＜0.05) difference under the low Cd concentrations (0 and 50 μmol L-1).AEA and proline content increased,as did MDA content,in the E+ (vs.E-) specimens under high Cd concentrations.There was no significant (P＞0.05) difference under low Cd concentrations.Endophyte infection was concluded to be of benefit to E.dahuricus exposed to high Cd concentrations.

外文关键词：

cadmiumElymus dahuricusgerminationantioxidant enzymeendophyte

作者：

ZHANG XingXu、LI ChunJie、NAN ZhiBiao

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作者单位：

State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agricultural Science and Technology, Lanzhou University,Lanzhou 730020, China

基金：

This work was supported by the National Basic Research Program of China国家自然科学基金Program for a New Century of Excellent Talents in the UniversityFundamental Research Funds for the Central UniversitiesScholarship Award for Excellent Doctoral Student granted by Ministry of Education

项目编号：

2007CB10890230771531NCET-08-0256lzujky-2012-k01224000-860008

出版年：

2012

DOI：

10.1007/s11427-012-4359-y

中国科学:生命科学(英文版)

中国科学院

中国科学:生命科学(英文版)

SCI

影响因子：0.806

ISSN：1674-7305

年,卷(期)：2012.55(9)

被引量17
参考文献量49