自然降温对邓恩桉叶片MDA含量及SOD活性的影响  

Influence of Natural Temperature Decrease on MDA and SOD Contents in Eucalyptus dunnii Leaves

作　　者：邓紫宇[1,2,3] 陈健波 郭东强[1,2,3] 

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]国家林业局中南速生材繁育实验室,广西南宁530002 [3]广西优良用材林资源培育重点实验室,广西南宁530002

出　　处：《贵州农业科学》2016年第9期33-36,共4页Guizhou Agricultural Sciences

基　　金：广西林业科学院基本科研业务费项目"邓恩桉保护酶活性与抗寒性关系研究"(林科201408);广西优良用材林资源培育重点实验室自主项目"邓恩桉遗传多样性的AFLP分析"(13-A-01-02)

摘　　要：为探明邓恩桉的耐寒机理,为其抗寒优良种源的选育与推广提供理论依据,以邓恩桉6个种源为试验材料,测定自然降温条件下邓恩桉叶片中丙二醛(MDA)含量及超氧化物岐化酶(SOD)活性。结果表明:在自然降温过程中,6个种源邓恩桉叶片中MDA含量随着温度的降低而升高,SOD活性随温度降低呈下降→上升→下降变化,但总体呈下降趋势,种源GED9509MDA含量的升高幅度与SOD活性的下降幅度均最小,在邓恩桉6个种源中抗寒性最强。In order to studying on investigate the cold-resistant mechanism of E.dunnii,to provide theoretical references for its excellent cold-resistant seedingsource breeding and spred the malondiadehyde（MDA）content and activity of superoxide dismutase（SOD）were investigated in E.dunnii leaves from six provenances.Results：MDA content increased with temperature decreasing,SOD activity showed a change trend of decreasing at first then increasing and decreasing at last,while it decreased in general.The smallest amplitude of change is provenance GED9509 during the natural temperature decrease,the cold resistance of provenance GED9509 was stronger than other provenances.

关 键 词：邓恩桉 丙二醛 超氧化物岐化酶 自然降温 

分 类 号：S792.39[农业科学—林木遗传育种]