甜瓜自毒作用的生理生化机制研究  

Physiological and Biochemical Mechanisms of Melon Autotoxicity

作　　者：高强[1] 谢新蕊[1] 奚玉培[1] 张志忠[1] 

机构地区：[1]福建农林大学园艺学院,福州350002

出　　处：《农学学报》2013年第11期30-33,73,共5页Journal of Agriculture

基　　金：福建省科技重大专项"蔬菜优质高效配套栽培技术研究"(2008NZ0002-1);福建农林大学园艺学院青年学术骨干培养基金"甜瓜化感作用机理研究"(FAFU2012YYPY08)

摘　　要：通过甜瓜植株水浸提液和根系分泌物处理甜瓜幼苗,测定部分相关生理生化指标,探讨甜瓜自毒作用的生理生化机制。结果表明,随着植株水浸提液和根系分泌物浓度的升高,根系活力呈明显下降趋势;自由水含量下降,束缚水含量上升;叶绿素a、叶绿素b和类胡萝卜素含量下降;活性氧上升;脯氨酸含量先降后升;可溶性糖和可溶性蛋白含量先升后降;抗坏血酸含量随根系分泌物处理浓度增加而持续下降,水浸提液处理时无明显变化;水浸提液处理后谷胱甘肽整体呈下升趋势,根系分泌物处理呈上升趋势,但无明显规律性。In this paper, physiological and biochemical mechanisms of melon autotoxicity induced by plant aqueous extracts and root exudates were analyzed. The results showed that root activity showed a downward trend with the concentration of melon extracts and root exudates rising; the free water content declined, the bound water content raised; chlorophyll a, chlorophyll b and carotenoid content decreased; activated oxygen increased; proline content decreased firstly and then increased; soluble sugar and soluble protein content increased firstly and then decreased; ascorbic acid content had no obvious changing in extracts conditions, and decreased gradually in root exudates conditions; glutathione content decreased in extracts conditions, and increased in root exudates conditions.

关 键 词：甜瓜 植株水浸提液 根系分泌物 自毒作用 

分 类 号：S642.9[农业科学—蔬菜学]