盐胁迫对不同玉米品种种子发芽及幼苗生长的影响.pdf

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1、第53卷第13期湖北农业科学Vol_53No．132014年7月HubeiAgriculturalSciencesJu1．，2014盐胁迫对不同玉米品种种子发芽及幼苗生长的影响金正律．周秋艳(商丘师范学院生命科学学院，河南商丘476000)摘要：研究了NaC1胁迫对不同玉米(ZeamaysL．)品种种子发芽及幼苗生长的影响。结果表明，NaC1胁迫显著影响玉米种子的发芽率．所有NaCl浓度下的发芽率都显著低于对照，并且随着NaCI浓度的增加。对发芽率的抑制增强品种间的发芽率表现出显著差异，济研94和郑单985的发芽率显著高于滑丰8号和濮单6号NaCl胁迫也显著抑制幼苗的生长所有的NaC1

2、浓度对幼苗的根长都显著抑制．而幼苗的芽长和鲜重只是在NaCl浓度≥50mmoYL时才被抑制从NaCl胁迫下的幼苗根长、芽长及鲜重等3个指标来看．济研94和郑单985的耐盐性显著高于滑丰8号和濮单6号NaC1胁迫与品种间的互作对幼苗芽长有显著的影响。说明NaC1胁迫对幼苗芽长的影响随品种而不同。它们之间存在相互依赖关系。关键词：玉米(ZeamatsL．)；NaC1胁迫；品种；发芽；幼苗生长中图分类号：$513；Q945．78文献标识码：A文章编号：0439—8114I2014)13—2989—03EfectsofNaCIStressonSeedGerminationandSeedling

3、GrowthofZeamaysL．JINZheng-lii，ZHOUQiu-yan(CollegeofLifeScience，ShangqiuNormalUniversity，Shangqiu476000，Henan，China)Abstract：EffectsofNaC1stressontheseedgerminationandseedlinggrowthofcorn(ZeamaysL．)wereinvestigated．There—suhsshowedthatNaC1stresssignificantlyaffectedseedgerminationrateofcorn．Thege

4、rminationratewassignificantlyinhib-itedinalloftheNaC1concentration．WiththeincreaseofNaC1concentrationtheinhibitionofgerminationwasmoreobvious．Thevarietiesshowedsignificantdifferencesingerminationrate，thegerminationrateofJiyan94andZhengdan985weresig—nificantlyhigherthanthatofHuafeng8andPudan6．The

5、earlygrowthofseedlingswassignificantlyinhibitedbyNaC1stress．TherootlengthshowedasignificantinhibitioninalloftheNaC1concentration．TheshootlengthandfreshweJ【ghtoftheseedlingsweresignificantlyinhibitedwhenthedensityofNaC1solufionwasmorethan25mmol／L．TheNaC1toleranceofJiyan94andZhengdan985weresignifi

6、cantlyhigherthanthatofHuafeng8andPudan6ontheseedlingrootlength，shootlengthandfreshweight．InteractionbetweenNaC1stressandvarietiesonshootlengthwassignificantlydifferent，indicatedtheeffectofNaC1stressonshootlengthwasdifferentfromvarieties．TherewasamutuallydependentrelationshipbetweenNaC1stressandv

7、arieties．Keywords：ZeamaysL．；NaC1stress；variety；seedgermination；seedlinggrowth盐害是农业生产上最主要的非生物逆境因子产量]。玉米(ZeamaysL．)是重要的粮食作物．也之一¨】-2]。我国是盐渍土分布广泛的国家．据统计．在是生产配合饲料和玉米加工产品的重要原料．研究我国耕地中就有10％为盐渍化土壤．并且随着工业其耐盐机理、开发利用耐盐种质、培育耐盐品种是污染加剧、灌溉