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1、中国水稻科学(ChinJRiceSci),２０１５,２９(１):６５－７２http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０１．００８６５干旱胁迫下NO对水稻日本晴叶片生理特性的影响杨永杰杨雪芹张彩霞符冠富陈婷婷陶龙兴∗(中国水稻研究所/水稻生物学国家重点实验室,杭州３１１００６;∗通讯联系人,EＧmail:lxtao＠fy．hz．zj．cn)EffectsofNitricOxideonDroughtStressＧinducedPhysiologicalC
2、haracteristicsinLeavesofNipponbare(OryzasativaL)YANGYongＧjie,YANGXueＧqin,ZHANGCaiＧxia,FUGuanＧfu,CHENTingＧting,TAOLongＧxing∗(ChinaNationalRiceResearchInstitute/StateKeyLaboratoryofRiceBiology,Hangzhou３１０００６,China;∗Correspondingauthor,EＧmail:lxtao＠fy．hz．zjc．n)YAN
3、GYongjie,YANGXueqin,ZHANGCaixia,etal．EffectsofnitricoxideondroughtstressＧinducedphysiologicalcharacteristicsinleavesofnipponbare(OryzasativaL)．ChinJRiceSci,２０１５,２９(１):６５Ｇ７２．Abstract:Torevealthemechanismsthatnitricoxide(NO)enhancesdroughttoleranceinrice,westudie
4、dtheeffectsofNOonleafphotosyntheticrate,relativewatercontentandantioxidantsystemofriceunderdroughtstress．Afterfoliarsprayof１００μmol/Lsodiumnitroprusside(SNP,aNOdonor)and/or１００μmol/LcPTIO(aNOscavengers),japonicanipponbare(OryzasativaL)wassubjectedtodroughtstressd
5、uringtilleringstageinaplastictank．Riceleavesweresampledforfurtherphysiologicalanalysisatthesixthdayaftertreatment．Resultsshowedthatfoliarsprayof１００μmol/LSNPenhancedricetolerancetodroughtstress,whichshowedhigherphotosyntheticrateandrelativewatercontent,butlowerm
6、alonaldehyde(MDA)andhydrogenperoxide(H２O２)contentsinleaveswhencomparedwiththecontrol,foliarsprayingwithdeionizedwater．Bycontrast,thecPTIOtreatmentsignificantlyreducedleafphotosyntheticrateandrelativewatercontent,andsignificantlyincreasedleafMDAandH２O２contents．F
7、urtherstudyindicatedthatfoliarapplicationofSNPsignificantlyincreasedsuperoxidedismutase(SOD)andcatalase(CAT)activities,butobservablysuppressedascorbicacid(AsA)contentandtotalglutathione(GSH＋GSSH)contentsunderdroughtstress．However,ithadnosignificantinfluenceonpe
8、roxidase(POD)activity,ascorbateperoxidase(APX)activityandtherewerenosignificantdifferenceamongthefourtreatments．ItwasconcludedthatnitricoxidemightincreasetheactivityofSODand
