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1、中国水稻科学(ChinJRiceSci),２０１５,２９(２):１５９－１６６http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０２．００７１５９外源磷处理对水稻籽粒植酸含量及相关代谢基因表达的影响苏达王复标雷炳婷王珏潘刚∗程方民∗(浙江大学农业与生物技术学院,杭州３１００５８;∗通讯联系人,EＧmail:pangang１２＠１２６．com;chengfm＠zju．edu．cn)TheResponseofPhyticAcidandItsExpressio
2、nProfilesinRice(OryzasativaL．)GrainasInducedbyPhosphorusSupply∗,CHENGFangＧmin∗SUDa,WANGFuＧbiao,LEIBingＧting,WANGJue,PANGang(CollegeofAgricultureandBiotechnology,ZhejiangUniversity,Hangzhou３１００５８,China;∗Correspondingauthors,EＧmail:pangang１２＠１２６c．om;chengfm＠zju
3、e．duc．n)SUDa,WANGFubiao,LEIBingting,etal．Theresponseofphyticacidanditsexpressionprofilesinrice(OryzasativaL．)grainasinducedbyphosphorussupply．ChinJRiceSci,２０１５,２９(２):１５９Ｇ１６６．Abstract:Phyticacid(PA)isthemainstorageformofphosphorus(P)incerealgrains．However,ther
4、elationshipbetweenexternalPsupplyandgrainPAaccumulationhasnotyetbeenfullyunderstood．Twojaponicaricecultivarswereusedtoinvestigatetheeffectsofphosphorus(P)treatmentsongrainphyticacid(PA)anditsrelationtoinositolphosphateＧrelatedgenesexpressionprofilesusingacult
5、ureofdetachedpanicleofrice(OryzasativaL．)．ResultsshowedthathighPlevelcausedasignificantincreaseingrainPA,inorganicP(Pi)andtotalPcontents．However,grainweightandPAcontentpergrainwerePconcentrationＧdependent,anddecreasedunderhighPtreatment(１２P)．HighPsupplydecrea
6、sedgrainZnandFeconcentrations,andtheirbioＧavailabilities．Moreover,PtreatmentalsoinfluencedallfourPArelatedgenesexpression(RINO１,ITP５/６KＧ６,IPK２andIPK１),especiallyforRINO１,arateＧlimitinggeneinPAsynthesisandhighlyexpressedinricegrains．Specifically,RION１geneexpre
7、ssionwasupＧregulatedatoptimumP(３P)concentration,butwassignificantlydownＧregulatedunderhighPtreatment(１２P),whichcorrespondedwiththevariationofgrainPAcontentinrice,suggestingRION１wasakeymetabolicgeneinPAsynthesiswithPsupply．Incontrast,onlyaslightcontributionofI
8、PK２genewasexhibitedinPAsynthesisinducedbyPsupply．Keywords:phyticacid;detachedricepanicleculture;RINO１;rice(OryzasativaL．)苏达,王复标,雷炳婷,等．外源磷处理对水稻籽粒植酸含量及相关代谢基因表达的影响．中国水稻科学,２０１５,２９(２):１５９Ｇ１６６．
