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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