萌芽期低温胁迫对枳种子萌发和生理特性的影响  

Effect of Low Temperature on Germination and Physiological Characteristics of Poncirus trifoliate Seeds at Germination Stage

作　　者：裴芸[1,2] 樊卫国[1,2] 马文涛[1,2] 

机构地区：[1]贵州省果树工程技术研究中心,贵州贵阳550025 [2]贵州大学喀斯特山地果树资源研究所,贵州贵阳550025

出　　处：《贵州农业科学》2011年第11期175-177,共3页Guizhou Agricultural Sciences

基　　金：贵州省果树工程技术研究中心建设专项"贵州喀斯特山区特异果树种质资源发掘与利用"(黔科合农G字2009-4003)

摘　　要：为探索枳种子萌发期耐低温的生理机制,为枳壳的抗冻育苗提供科学依据,以枳种子为材料,研究了萌芽期不同温度处理对枳种子萌发和生理特性的影响。结果表明:枳种子对低温胁迫敏感,其发芽率随处理温度的降低而下降,电解质渗漏率和膜脂过氧化产物(MDA)含量则随温度降低而上升。枳种子萌芽期不能承受-5℃低温处理,在此温度下种子播种40d未萌发,电解质渗漏率明显上升,超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性明显下降,过氧化物酶(POD)活性达到最大,MDA大量积累,发生不可逆冻害。The effect of low temperature on germination and physiological characteristics of P.trifoliate seeds at germination stage was studied to probe the physiological mechanism of tolerance to low temperature at seed germination stage and provide the scientific basis for raising seedlings of P.trifoliate at low temperature.The results showed that the germination rate reduced with temperature drop,but the electrolyte leakage rate and MDA content rose with temperature drop.The seeds could not germinate under-5℃ at germination stage after 40d because of high electrolyte leakage rate,lower SOD and CAT activity,maximum POD activity and MDA accumulation.

关 键 词：枳 种子 温度 发芽率 生理特性 

分 类 号：S665.9[农业科学—果树学]