花生根分泌物的鉴定及其化感作用  

Identification of peanut root exudates and their allelopathic effects

作　　者：王小兵[1,2] 骆永明[2,3] 刘五星[2] 李振高[2] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225009 [2]中国科学院土壤环境与污染修复重点实验室,中国科学院南京土壤研究所,南京210008 [3]中国科学院烟台海岸带研究所,山东烟台264003

出　　处：《生态学杂志》2011年第12期2803-2808,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金重点项目(40432005);中国科学院知识创新工程重要方向项目(KSCX2-YW-G-053-3)资助

摘　　要：采用改进的根系分泌物循环收集系统收集花生根系分泌物,利用气相色谱/质谱联用仪(GC-MS)鉴定其结构,并研究了花生根系分泌物对花生青枯病原菌的化感作用。结果表明,花生根系分泌物中主要含有丙三醇、苯甲酸、3,5-二甲基苯甲醛、苯乙酮、硬脂酸、棕榈酸和乳酸等7种物质。7种根系分泌物中只有苯乙酮在浓度低于0.1g·L-1时,对花生青枯病原菌生长才有明显的促进作用。同时还发现,苯乙酮浓度超过0.1g·L-1后对花生青枯病原菌有显著的抑制作用。这一结论为利用苯乙酮调控花生青枯病害的发生提供了可靠的依据。The root exudates of peanut collected by a modified continuous collecting device and XAD-4 ion exchange resin were identified by GC-MS,and their allelophatic effects on Ralstonia solanacearum were studied.The root exudates mainly contained acetophenone,glycerol,benzoic acid,3,5-dimethyl benzaldehyde,stearic acid,palmitic acid,and lactic acid,among which,only acetophenone had obvious promotion effect on the growth of R.solanacearum at concentration 0.1 g·L-1,and significant inhibitory effect at concentration 0.1 g·L-1.These findings could provide a credible basis for using acetophenone to control the occurrence of R.solanacearum.

关 键 词：花生 根分泌物 GC-MS 花生青枯病原菌 化感作用 

分 类 号：S565.2[农业科学—作物学]