丛枝菌根提高百喜草抗旱性的机制研究-论文.pdf

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1、第203174卷年1期月Journa安lo徽fAn师hu范iNo大rm学alU学ni报vers(i自ty然(N科at学ur版alS)cience)Vo1．37No．1Jan．2014StudiesonMechanismsUnderlyingPromotionofArbuscularMycorrhizasonDroughtResistanceinBahiaGrassWUXue—jun，ANJing，XIAOJia—xin，YANGAn—na，HUAJun，YANGBo(KeyLaboratoryfortheConservationandUtilizationofImp

2、ortantBiologicalResourcesinAnhuiProvince，CollegesofLifeSciences，AnhuiNormalUniversity，Wuhu241000，China)Abstract：Apotcultureexperimentwasconductedtostudythephysiologicalresponsesofbahiagrass(Paspalumnotatuzn)toarbuscularmycorrhizal(AM)fungi，Glomusmosseae，G．versiformeorG．mosseae+G．versif

3、orrhecolonizationunderamplewaterordroughtstress．AMinoculationespeciallyG．rnosseae+G．t厂0resignificantlyalleviatedthegrowthreductionofdroughtstress．Nitrogen(N)，phosphorus(P)，potassium，calciumandmagnesiumcontentsinshoots，NandPinrotsofAMplantswerehigherthanthoseinnon—AMonesunderdroughtstre

4、ss．AMinoculationincreasedacidphosphataseandcatalaseactivities，andtotalglomalincontentinrhizospheresoils．Whetherdroughtstressornot．AMinoculationincreasedshotperoxidaseactivityanddecreasedshotmalondialdehydecontent，althoughnosignificantdifferencewasobservedonshotsuperoxidedismutaseactivi

5、ty．Underdroughtstress，AMplantshadhighers。lublesugarandproteincontents，buthadlowerprolinecontentthanthoseinnon．AMones．ResultsdemonstratedthatthebenefitofAMcolonizationespeciallyG．mosseae+G．versiformewasduetotheenhancementofsoilenzymes，nutrition，osmoregulationandantioxidasemattersinplant

6、s，leadingtoimprovementofplantgrowthunderdroughtstress．Keywords：arbuscularmycorrhizae；paspalumnotatum；droughtresistance；physiologicalresponseClassificationNo．：Q945Documentcode：APaperNo．：1001—2443(2014)01—0047—06Droughtisconsideredtobeoneofthemostimportantabioticstresslimitingplantgrowth

7、andyield，particularlyinaridandsemi．aridareas[1。．Arbuscularmycorrhizae(AM)isoneofthemostabundantundergroundsymbiosis，sinceAMfungicouldcolonizeapproximately80％ofthehigherplantspeciesL引．AMfungiplayanimportantroleinthemaintenanceofagroecosystemstabilityandsustainableagricultura1developme