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生长素转录调控因子在丛枝菌根真菌促进番茄磷吸收中的作用.docx

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生长素转录调控因子在丛枝菌根真菌促进番茄磷吸收中的作用 Title:RolesofAuxinTranscriptionalRegulatorsinArbuscularMycorrhizalFungiPromotingPhosphateUptakeinTomato. Introduction: Arbuscularmycorrhizal(AM)fungiformamutualisticsymbioticrelationshipwiththemajorityofplantspecies,includingtomato(Solanumlycopersicum).Thisassociationenhancestheplant'sabilitytoabsorbessentialnutrients,suchasphosphate.Itiswell-establishedthatplanthormones,includingauxin,playacrucialroleinregulatingAMsymbiosis.Auxinservesasakeytranscriptionalregulatorinseveralaspectsofplantdevelopmentandresponsetoenvironmentalstimuli.ThispaperaimstoexploretherolesofauxintranscriptionalregulatorsinAMfungipromotingphosphateuptakeintomatoplants. AuxinandAMSymbiosis: Auxinisamultifunctionalhormonethatcontrolsvariousdevelopmentalprocessesinplants,includingcellelongation,rootgrowth,andlateralrootformation.Auxinbiosynthesisandsignalingpathwaysarewell-knowntoberegulatedduringAMsymbiosis,influencingfungalcolonizationandnutrientexchangebetweenthefungusandplant.Recentstudieshavehighlightedtheimportanceofauxintranscriptionalregulatorsinmediatingtheseprocesses. AuxinTranscriptionalRegulators: 1.AuxinResponseFactors(ARFs): ARFsaretranscriptionfactorsthatregulatetheexpressionofauxin-responsivegenes.TheytypicallybindtoAuxinResponseElements(AuxREs)presentinthepromoterregionsoftargetgenes.InAMsymbiosis,ARFshavebeenfoundtocontroltheexpressionofgenesinvolvedinphosphatetransportandmetabolism,contributingtoenhancedphosphateuptakeintomatoroots. 2.Auxin/Indole-3-AceticAcid(AUX/IAA)Proteins: AUX/IAAproteinsplayavitalroleinattenuatingauxinsignalingthroughprotein-proteininteractionswithAuxinResponseFactors.RecentstudieshavesuggestedthatAUX/IAAproteinsareinvolvedinregulatingAMsymbiosisbyfine-tuningauxinsignaling.ModulationofAUX/IAAexpressionappearstoaffectAMfungalcolonizationandphosphateuptakeefficiencyintomato. 3.GretchenHagen3(GH3)Family: GH3proteinsareinvolvedintheconjugationofindole-3-aceticacid(IAA),amajorauxin,toaminoacids,increasingitsstabilityandreducingitsact