淡紫拟青霉（Thom）Samson澳大利亚分离株的亮氨酸抑菌素产生及杀线虫活性
Production of leucinostatins and nematicidal activity of Australian isolates of Paecilomyces lilacinus (Thom) Samson.
作者信息
Park J O, Hargreaves J R, McConville E J, Stirling G R, Ghisalberti E L, Sivasithamparam K
机构信息
Soil Science and Plant Nutrition, The University of Western Australia, Crawley, Western Australia, Australia.
出版信息
Lett Appl Microbiol. 2004;38(4):271-6. doi: 10.1111/j.1472-765x.2004.01488.x.
AIMS
To evaluate the relationship between leucinostatin production by Paecilomyces lilacinus isolates and their biological activities.
METHODS AND RESULTS
The nematicidal, parasitic and enzymatic activity of Australian P. lilacinus isolates were investigated. Nematicidal activities of culture filtrates were measured by mortality and inhibition of reproduction of Caenorhabditis elegans, whereas egg-parasitic activity was measured by colonization on Meloidogyne javanica. Enzymatic activities (protease and chitinase) were assayed on solid media. The results suggest that leucinostatins in P. lilacinus are indicators of nematicidal activity, whereas chitinase activity might be related to parasitism.
CONCLUSIONS
Nematicidal activity of culture filtrates of Paecilomyces lilacinus strains related to their ability to produce leucinostatins.
SIGNIFICANCE AND IMPACT OF THE STUDY
This is the first study describing the leucinostatins as nematicides.
目的
评估淡紫拟青霉分离株产生亮抑菌素与它们生物学活性之间的关系。
方法与结果
研究了澳大利亚淡紫拟青霉分离株的杀线虫、寄生和酶活性。通过秀丽隐杆线虫的死亡率和繁殖抑制来测定培养滤液的杀线虫活性，而通过对爪哇根结线虫的定殖来测定卵寄生活性。在固体培养基上测定酶活性（蛋白酶和几丁质酶）。结果表明，淡紫拟青霉中的亮抑菌素是杀线虫活性的指标，而几丁质酶活性可能与寄生作用有关。
结论
淡紫拟青霉菌株培养滤液的杀线虫活性与其产生亮抑菌素的能力有关。
研究的意义和影响
这是第一项将亮抑菌素描述为杀线虫剂的研究。
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