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1、中國水稻科學(xué)(ChinJRiceSci),２０１５,２９(１):６５－７２http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０１．００８６５干旱脅迫下NO對水稻日本晴葉片生理特性的影響楊永杰楊雪芹張彩霞符冠富陳婷婷陶龍興?(中國水稻研究所/水稻生物學(xué)國家重點(diǎn)實驗室,杭州３１１００６;?通訊聯(lián)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
