Characterization of soybean β-expansin genes and their expression responses to symbiosis, nutrient deficiency, and hormone treatment.

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1、ApplMicrobiolBiotechnol(2014)98:2805–2817DOI10.1007/s00253-013-5240-zENVIRONMENTALBIOTECHNOLOGYCharacterizationofsoybeanβ-expansingenesandtheirexpressionresponsestosymbiosis,nutrientdeficiency,andhormonetreatmentXinxinLi&JingZhao&ThomasC.Walk&HongLiaoReceived:16May2013/Revised:15August

2、2013/Accepted:18August2013/Publishedonline:10October2013#Springer-VerlagBerlinHeidelberg2013AbstractExpansinsareplantcellwall-looseningproteinsInaddition,mostβ-expansingeneswereassociatedwithsym-encodedbyasuperfamilyofgenesincludingα-expansin,biosisofsoybeaninoculatedwithRhizobiumorabu

3、scularβ-expansin,expansin-likeA,andexpansin-likeBproteins.mycorrhizalfungi(AMF).Takentogether,theseresultsTheyplayavarietyofbiologicalrolesduringplantgrowthsystematicallyinvestigatethecharacteristicsoftheentireanddevelopment.ExpansingeneshavebeenreportedinmanyGmEXPBfamilyinsoybeanandco

4、mprisethefirstreportplantspecies,andresultsprimarilyfromgraminaceousmem-analyzingtherelationshipofGmEXPBswithrhizobialorbersindicatethatβ-expansinsaremoreabundantinmonocotsAMFsymbiosis.Thisinformationisavaluablestepinthethanindicots.Soybean[Glycinemax(L.)Merr]isanimportantprocessofunde

5、rstandingtheexpansinproteinfunctionsinlegumecrop.Thisworkidentifiednineβ-expansingenefamilysoybeanandopensavenuesforcontinuedresearches.membersinsoybean(GmEXPBs)thatweredividedintotwodistinctclassesbasedonphylogenyandgenestructure,withKeywordsβ-expansin.Genefamily.Expressionpattern.div

6、ergencebetweenthetwogroupsoccurringmoreinintronsSoybeanthaninexons.Atotalof887hormone-responsiveandenviron-mentalstress-relatedputativecis-elementsfrom188familieswerefoundinthe2-kbupstreamregionofGmEXPBs.IntroductionVariationsinnumberandtypeofcis-elementsassociatedwitheachgeneindicatet

7、hatthefunctionofthesegenesisdifferen-Plantshaveevolvedtoughandflexible,butsometimesfairlytiallyregulatedbythesesignals.Expressionanalysisconfirmedrigid,layercellwallstoprotecttissuesfromenvironmentalthatthefamilymemberswereubiquitously,yetdifferentiallydamageaswellastomaintainstructu