NaCl胁迫对赖草幼苗生理特性的影响  

Effect of NaCl stress on physiological characteristics of Leymus secalinus seedling

作　　者：杜利霞[1] 董宽虎[1] 乔志宏[1] 韩汝旦[1] 娄世杰[1] 

机构地区：[1]山西农业大学动物科技学院,山西太谷030801

出　　处：《草原与草坪》2013年第1期1-4,10,共5页Grassland and Turf

基　　金："十一五"国家科技支撑计划(2007BAD56B01);山西省科技攻关项目(20120311011-1);山西省科技基础条件平台建设项目(2012091004-0101)资助

摘　　要：以赖草为材料,用不同浓度NaCl(100、200、300、400、500、600、700mmol/L)对赖草进行处理,通过测定叶片含水量、根冠比(R/T)、丙二醛(MDA)、可溶性糖、超氧化物歧化酶(SOD)活性,研究赖草的耐盐能力。结果表明,NaCl浓度低于400mmol/L时赖草叶片含水量、根冠比(R/T)与对照相比变化不显著(P>0.05);随NaCl浓度增加,SOD活性和可溶性糖含量呈先上升后下降的趋势;MDA含量呈上升的趋势。赖草在400mmol/L NaCl胁迫下能正常生长,当浓度达到500mmol/L时生长受到影响。The salt resistance of Leymus secalinus was studied through NaCl solution treatment with differ ent concentrations （0,100,200,300,400,500,600,700 mmol/L）. The results showed that water content of leaves and root-top ratio（R/T） were not significantly different from CK under 400 mmol/L concentration. With the stress intensity increased,monodehydroascorbate （MDA） content was increased, SOD activity and soluble sugar was firstly increased and then decreased. In conclusion, Leymus secalinus could normally grow under 400 mmol/L NaC1 stress.

关 键 词：NACL胁迫 赖草 生理特性 

分 类 号：Q945[生物学—植物学]