干旱胁迫对福建山樱花和日本樱花幼苗内源激素的影响.pdf

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1、热带作物学报2014，35(6)：1143—1147ChineseJournalofTropicalCrees干旱胁迫对福建山樱花和日本樱花幼苗内源激素的影响李书平，魏建康，张迎辉，荣俊东许雅明t，郑郁善．一，陈礼光1福建农林大学林学院．福建福州3500022福建农林大学艺术园林学院．福建福州350002摘要以1年生福建山樱花和日本樱花实生苗为试材，设置对照(CK)、轻度干旱胁迫(IJs)、中度干旱胁迫(MS)、重度干旱胁迫(HS)4种处理，探究干旱胁迫对福建山樱花和日本樱花幼苗内源激素的影响。结果表明：2个树种在Ls处理下，GA(赤霉素)和IAA(生长素)的含量均

2、高于对照，ABA(脱落酸)的含量和对照无显著差异。在MS和HS处理下，GA和IAA含量呈现明显降低趋势，ABA、ABA／GA和ABA／IAA的含量呈现明显的增加趋势。随着干旱胁迫处理时间的延长，在【s处理下，GA、IAA和ABA的含量元显著变化，而MS和HS处理中．GA和IAA含量呈现出下降趋势，ABA含量、ABA／GA和ABMIAA呈增加的趋势。随着干旱胁迫程度的加深．福建山樱花ABA、GA、IAA、ABA／GA和ABA／IAA的含量均要低于日本樱花．这表明日本樱花比福建山樱花可能存在着更强的通过调节自身的激素水平来应对外界干旱胁迫的能力．这可能正是日本樱花比福建

3、山樱花更加抗旱的生理机制之一关键词日本樱花；福建山樱花；内源激素；干旱胁迫；动态变化中图分类号$662．5文献标识码ATheEfectsofDroughtStressOnEndogenousHormonein砌fnuscampanulataMaxim．andPrunusyedoensisMatsum．SeedlingsLIShuping，WEIJiankang2，ZHANGYinghui。，RONGJundongXUYaming，ZHENGYushan，CHENLiguang1CollegeofForestry,F~jianAgricultureandForestr

4、yUniversity,Fuzhou,F~jian350002，China2CollegeofArtandLandsc~eArchitecture，FujianAgricultureandForestryUniversity,Fuzhou，Fujian350002，ChinaAbstractTheeffectsofdroughtstressontheendogenoushormoneof1-year-oldpot—culturedncampanulataMaximandPrunusyedoensisMatsumseedingswerestudiedunderwate

5、rtreatmentgradient(CK，LS，MSandHS)．TheresultsshowedthatunderLS，thecontentofIAAandGAwerehigherthanthatoftIleCK。whilethecontentofABAhadnosignificancewithCK；UnderMSandHS．tl1econtentofGA1andIAAdecreasedsignificantly，andthecontentofABA，ABA，GA1andABA／IAAincreasedobviously．Wihtthetimeofdrought

6、stressprolonged，thecontentofGA3，IAAandABAhadnosignificantchangesunderI_S，comparedwihtLS，thecontentofGA3andIAAshowedadownwardtrendandthecontentofABA，ABA／GAandABA／IAAshowedatrendencyofincreaseunderMSandHS．Withthedroughtstressstrengthening，thecontentofABA，GA3，IAAandABA／GA1andABA，IAA0fPcam

7、panulataMaximwashigherthanthatofPyedoensisMatsum，whichshowedthat只yedoensisMatsumhadhigherabilityofadjustingthehormoneleveltodealwiththedroughtstressoutsidethanP．campanulataMaximwhichmaybeoneofthephysiologicalmechanismthatP．yedoensisMatsumhadahigherdroughtresistanceabilitythancampanul