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1、作物學(xué)報，2005,12：1593-1599小麥葉片水分利用效率及相關(guān)生理性狀的關(guān)系研究張娟1,2張正斌1,*謝惠民2,*董寶娣1胡夢蕓1徐萍1（1中國科學(xué)院遺傳與發(fā)育生物學(xué)研究所農(nóng)業(yè)資源研究中心，河北石家莊0500212西北農(nóng)林科技大學(xué)，陜西楊凌712100）摘要：利用19個抗旱性不同的小麥品種，對干旱狀態(tài)下葉片水分利用效率和光合速率、蒸騰速率等12個指標(biāo)之間的關(guān)系進行了研究。結(jié)果表明，葉片水分利用效率與葉片光合速率、蒸騰速率、氣孔導(dǎo)度、胞間二氧化碳濃度、水勢和葉片離體失水速率之間的關(guān)系密切，說明這些生理性狀是瞬間和短時期葉片水分利用效率的直接影響因素；而與葉片抗氧化酶活性、蠟
2、質(zhì)含量、葉片溫度和相對含水量相關(guān)性不大。因此認(rèn)為，應(yīng)該有針對性地的研究與水分利用效率關(guān)系密切的生理性狀，為小麥抗旱節(jié)水遺傳育種研究提供理論依據(jù)。關(guān)鍵詞：小麥;水分利用效率;生理指標(biāo);相關(guān)性;干旱脅迫中圖分類號：S512TheRelationshipbetweenWaterUseEfficiencyandRelatedPhysiologicalTraitsinWheatLeavesZHANGJuan1,2,ZHANGZheng-Bin1,*,XIEHui-Min2,*,DONGBao-Di1,HUMeng-Yun1,XUPing1(1CenterofAgriculturalReso
3、urce,InstituteofGeneticsandDevelopmentalBiology,ChineseAcademyofScience,Shijiazhuang050021,Hebei;2NorthwestSci-TechUniversityofAgricultureandForestry,Yangling712100,Shaanxi,China)Abstract:Watershortageisamainlimitedfactortoagricultureandcropproduction,soitisimportanttoimprovethecropwateruseef
4、ficiency(WUE)inlimitedwaterresource.TheleafWUEisthephysiologicalfoundationforimprovingfieldwateruseefficiency.InearlyresearchesonlyoneorafewwheatvarietieswereemployedtoanalyzetherelationshipbetweenWUEandsingleorafewphysiologicaltraits,oronlythedailyvariationregularityofleafWUEandrelevantphysi
5、ologicaltraitsstudied.19wheatcultivars,possessingdifferentdrought-resistance,fromdifferentwinterwheatgrowthregionsinChina,wereemployedinthisdrought-resistancetrial,withnoirrigationduringwholegrowthperiod,foranalyzingthecorrelationbetweenleafWUEandother11traitsofwheatflagleaf,includingphotosyn
6、theticrate(Pn),transpirationrate(Tr),stomataconductance(Cond),intercellularCO2concentration(Ci),waterpotential(Ψw),waterlossrateofcuttingleaves(RWL),anti-oxidativeenzymeactivities.TheresultsshowedthatthereweresignificantlinearcorrelationsbetweenleafWUEandsixphysiologicaltraitsincludingPn,Tr,C
7、ond,Ci,ΨwandRWL,sothatthesixtraitswereconsideredtobethedirectinfluencefactorstoinstantaneousleafWUEtowhichmoreattentionshouldbepaidinwheatbreeding.TherewereinsignificantcorrelationsbetweenleafWUEandotherfourtraitsincludinganti-oxidativeenzyme
