Nematicidal activity of Trichoderma spp. and isolation of an active compound |
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Authors: | Yang Zhong-Shan Li Guo-Hong Zhao Pei-Ji Zheng Xi Luo Shao-Liu Li Lei Niu Xue-Mei Zhang Ke-Qin |
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Affiliation: | (1) Laboratory for Conservation and Utilization of Bio-resource, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, 650091 Kunming, China;(2) State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650204 Kunming, People’s Republic of China; |
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Abstract: | Trichoderma spp. play an important role in biotic control, and several are efficacious against nematodes. To study the potential of Trichoderma species in controlling nematodes, fungal filtrates of 329 Trichoderma strains were evaluated for their nematicidal activity against Panagrellus redivivus and Caenorhabditis elegans. Fifteen strains exhibited nematicidal activity against P. redivivus, and 14 strains showed activity against C. elegans. The strain YMF1.02647 showed strong nematicidal activity against both nematodes, and the culture broth could cause more than 90% mortality to the tested nematodes within 48 h. A nematicidal compound was isolated from ethyl acetate extract of Trichoderma YMF1.02647 based on bioassay-guided fractionation. The compound was identified as trichodermin according to the spectroscopic data, which could kill more than 95% both P. redivivus and C. elegans in 72 h at 0.4 g l−1. |
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