预览加载中，请您耐心等待几秒...

microRNA响应植物非生物胁迫的研究进展.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

microRNA响应植物非生物胁迫的研究进展 MicroRNAs(miRNAs)aresmallnon-codingRNAmoleculesthatplayacrucialroleinregulatinggeneexpressioninplants.Theyhavebeenrecognizedasimportantregulatorsinvariousbiologicalprocesses,includingdevelopment,growth,andresponsetoabioticstressinplants.Inrecentyears,theresearchprogressonmiRNAsrespondingtonon-biologicalstressesinplantshasattractedincreasingattention.ThispaperaimstoreviewthecurrentresearchfindingsontheresponseofmiRNAstonon-biologicalstressesinplants,withafocusonthemolecularmechanismsandregulatorynetworksinvolved. Non-biologicalstresses,includingdrought,salinity,temperatureextremes,andheavymetaltoxicity,poseaseverethreattoplantgrowthanddevelopment.Tocopewiththesestresses,plantshaveevolvedcomplexregulatorymechanisms,includingtheregulationofgeneexpressionthroughmiRNAs.NumerousstudieshavedemonstratedthatmiRNAsplaykeyrolesintheresponseofplantstonon-biologicalstresses. Droughtstressisoneofthemostcommonanddetrimentalnon-biologicalstressesthatplantsface.SeveralmiRNAshavebeenfoundtobeinvolvedintheregulationofdroughtresponseinplants.Forexample,miR156,miR159,andmiR164havebeenshowntoregulatetheexpressionofstress-relatedtranscriptionfactors,suchasMYBandNAC,whichareinvolvedindroughtstressresponse.Additionally,miR319,miR393,andmiR396havebeenfoundtoparticipateintheregulationofstomatalmovement,watertransport,androotdevelopmentunderdroughtstress. Salinitystress,causedbyhighlevelsofsaltinthesoil,isanothersignificantnon-biologicalstressaffectingplantgrowthanddevelopment.MultiplemiRNAshavebeenidentifiedtofunctionintheregulationofsaltstressresponseinplants.Forinstance,miR160,miR164,miR167,andmiR393werereportedtotargetkeygenesinvolvedintheregulationofiontransportandhomeostasis,suchasauxinresponsefactors(ARFs)andtransportinhibitorresponse1(TIR1).ThesemiRNAsplaycriticalrolesinmaintainingionbalanceandosmoticstressresponsesundersaltstressconditions. Temperatureextremes,includingheatstressandcoldstress,haveprofoundeffectsonplantgrowthandsurvival.Agrowingbodyofevidencesugg