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1、AVariableClusterofEthyleneResponseFactor-LikeGenesRegulatesMetabolicandDevelopmentaiAcclimationResponsestoSubmergenceinRice凹TakeshiFukao,aKenongXu,bPamelaC.Ronaid,bandJuliaBa订ey-Serres"1Authorinfonnation»Articlenotes»CopyrightandLicenseinformation►Thisarticlehasbeencitedbyo
2、therarticlesinPMC.Goto:ABSTRACTSubmergence-^(S〃方1),amajorquantitativetraitlocusaffectingtoleraneetocompletesubmergenceinlowlandrice(Oryzasativa),containstwoorthreeethyleneresponsefactor(ERF)-likegeneswhosetranscriptsareregulatedbysubmergence.Inthesubmergenee-intolerantjapon
3、icacultivarM202,thislocusencodestwoERFgenes,SublBandSublC.Inthetolerantnear-isogeniclinecontainingtheSublocusfromtheindicaFR13A,M202(Subl),thelocusadditionallyencodestheERFgeneSubW.Duringsubmergence,thetolerantM202(S〃方1)displayedrestrained1eafandinternodeelongation,chlorop
4、hylldegradation,andcarbohydrateconsumption,whereastheenzymaticactivitiesofpyruvatedecarboxylaseandalcoholdehydrogenasewereincreasedsignificantlycomparedwiththeintolerantM202.Transcriptlevelsofgenesassociatedwithcarbohydrateconsumption,ethanolicfermentation,andcellexpansionw
5、eredistinctlyregulatedinthetwolines.SubikandSublCtranscriptlevelswereshowntobeuprcgulatedbysubmergenceandcthylcnc,withtheSublCalleleinM202alsoupregulatedbytreatmentwithgibberellicacid(GA).ThesefindingsdemonstratethattheSubregionhaplotypedeterminesethylene-andGA-mediatedmet
6、abolicanddevelopmenlalresponsestosubmergeneethroughdifferenlialexpressionofSublAandSublC.SubmergencetoleranceinlowlandriceisconferredbyaspecificallelevariantofSubkthatdampensethyleneproductionandGAresponsiveness,causingquiescenceingrowththatcorrelateswiththecapacityforregr
7、owthupondesubmergence.Goto:INTRODUCTIONFloodingofcroplandsisafrequentnaturaldisasterinmanyregionsoftheworld.Thefloodingofrootsystemsandpartialtocompletesubmergenceofaerialorganscandramaticallyreducecropproductivity.Plantsubmergenceattributabletocompletefloodingrestrictsthed
8、iffusionofoxygenandcarbondioxideby10“-fold，whichhasadramaticimpactonbiochemicalact
