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1、中国水稻科学(ChinJRiceSci),２０１５,２９(１):３５－４４http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０１．００５３５水稻SUMO化E３连接酶SIZ１调控缺磷条件下根的发育和根构型形成周红敏王化敦孙瑞裴文霞吴学能曹越孙雅菲徐国华孙淑斌∗(南京农业大学资源与环境科学学院,南京２１００９５;∗通讯联系人,EＧmail:sunshubin＠njau．edu．cn)OsSIZ１RegulatestheDevelopment
2、andArchitectureoftheRootsunderPhosphateStarvationConditionsinRiceZHOUHongＧmin,WANGHuaＧdun,SUNRui,PEIWenＧxia,WUXueＧneng,CAOYue,SUNYaＧfei,XUGuoＧhua,SUNShuＧbin∗(CollegeofResourcesandEnvironmentalScience,NanjingAgriculturalUniversity,Nanjing２１００９５,China;
3、∗Correspondingauthor,EＧmail:sunshubin＠njaue．duc．n)ZHOUHongmin,WANGHuadun,SUNRui,etal．OsSIZ１regulatesthedevelopmentandarchitectureoftherootsunderphosphatestarvationconditionsinrice．ChinJRiceSci,２０１５,２９(１):３５Ｇ４４．Abstract:PlantscopewiththelowPenvironmen
4、tbyalteringtheirrootarchitecture．Here,westudiedtheroleofSUMOE３ligaseSIZ１ontherootdevelopmentandarchitecture,andtherelationshipamongOsSIZ１,phosphatestressandauxinusingossiz１mutants．ComparedwithwildＧtype(WT),theossiz１mutationinhibitedtheelongationofsem
5、inalrootsandadventitiousroots,promotedlateralrootsformationandroothairproliferation．However,theresponseoftheossiz１mutationwasstrongerthanWTunderPideficiency,namely,thetrendofrootelongationandtheincreaseofthelateralrootdensityandtheroothairnumberofoss
6、iz１weremoreobviousrelativetoWTseedlings．ThissuggeststhatOsSIZ１regulatestherootarchitecture,andtheeffectismoreobviousunderPideficiency．ThetotalPconcentrationofshootsandrootsinossiz１ishigherthanWT,thissuggeststhatOsSIZ１negativelyregulatesphosphorusacqu
7、isitionanduse．AndrelativeexpressionofOsYUCCA１andOsPIN１a/１binossiz１rootsismarkedlyupＧregulatedcomparedwithWT．ThissuggeststhatOsSIZ１negativelyregulatestheauxinbiosynthesisandpolarauxintransport,whichisweakenedunderPiＧdeficientconditions．Together,theser
8、esultssuggestthatOsSIZ１regulatesPistarvationＧinducedrootarchitectureremodelingpossiblythroughthecontrolofauxinpatterning．Keywords:rice;phosphate;OsSIZ１;rootarchitecture周红敏,王化敦,孙瑞,等．水稻SUMO化E３连接酶SIZ１调控缺磷条件下根的发育和根构型形成．中国水稻科学,２０１５,２９(１):３５Ｇ４４．摘要:植物应对磷胁迫的
