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生态学杂志 ›› 2011, Vol. 30 ›› Issue (12): 2803-2808.

• 研究报告 • 上一篇    下一篇

花生根分泌物的鉴定及其化感作用

王小兵1,2,骆永明2,3**,刘五星2,李振高2   

  1. 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
  • 出版日期:2011-12-08 发布日期:2011-12-08

Identification of peanut root exudates and their allelopathic effects. 

WANG Xiao-bing1,2, LUO Yong-ming2,3**, LIU Wu-xing2, LI Zhen-gao2   

  1. 1 College of Environmental Sciences and Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, China;2 Key Laboratory of Soil Environment and Pollution Remediation of Chinese Academy of Sciences, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;3 Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Ynatai 264003, Shandong, China
  • Online:2011-12-08 Published:2011-12-08

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0.1 g·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0.1 g 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。

关键词: 蓝碳, 海草床, 滨海湿地, 气候变化, 碳逃逸, 碳循环

Abstract: 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.

Key words: blue carbon, seagrass bed, coastal wetland, climate change, carbon emission, carbon cycle.