期刊
BIOCONTROL
卷 55, 期 3, 页码 435-444出版社
SPRINGER
DOI: 10.1007/s10526-009-9261-6
关键词
Biological control; Hydroponics; Lokisin; Oomycetes; Pseudomonas koreensis; Pythium ultimum
类别
资金
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS)
The use of biosurfactants is a promising alternative in biological control of zoospore-producing oomycetes, which are a major plant pathogen world-wide in a wide variety of crops. Oomycetes are of particular concern in closed hydroponic cultivation systems. The present study investigated the efficacy of a biosurfactant produced by Pseudomonas koreensis and added as a crude extract against the oomycete Pythium ultimum in hydroponic tomato cultivation. A significant reduction in disease was observed. Biosurfactant addition did not affect the indigenous root microflora when evaluated as sole carbon source utilisation. Chemical analysis, using electrospray hybrid mass spectrometry (ESI-MSMS), of the biosurfactant indicated it to be lokisin, a cyclic lipopeptide. These results confirm that biosurfactants are important in developing sustainable biological control strategies for oomycetes.
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