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Microorganisms

Title:		Pathogenicity and Volatile Nematicidal Metabolites from Duddingtonia flagrans against Meloidogyne incognita
Author(s):		Mei X; Wang X; Li G;
Address:		"State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, Yunnan University, Kunming 650032, China"
Journal Title:		Microorganisms
Year:		2021
Volume:		20211031
Issue:		11
Page Number:		-
DOI:		10.3390/microorganisms9112268
ISSN/ISBN:		2076-2607 (Print) 2076-2607 (Electronic) 2076-2607 (Linking)
Abstract:		"Plant parasitic nematodes, especially parasitic root-knot nematodes, are one of the most destructive plant pathogens worldwide. The control of plant root-knot nematodes is extremely challenging. Duddingtonia flagrans is a type of nematode-trapping fungi (NTF), which produces three-dimensional adhesive networks to trap nematodes. In this study, the pathogenicity and volatile organic compounds (VOCs) of the NTF D. flagrans against the plant root-knot nematode, Meloidogyne incognita, were investigated. The predatory process of D. flagrans trapping M. incognita was observed using scanning electron microscopy. Gas chromatography-mass spectrometry analysis of the VOCs from D. flagrans led to the identification of 52 metabolites, of which 11 main compounds were tested individually for their activity against M. incognita. Three compounds, cyclohexanamine, cyclohexanone, and cyclohexanol, were toxic to M. incognita. Furthermore, these three VOCs inhibited egg hatching of M. incognita. Cyclohexanamine showed the highest nematicidal activity, which can cause 97.93% mortality of M. incognita at 8.71 microM within 12 h. The number of hatched juveniles per egg mass after 3 days was just 8.44 when treated with 26.14 microM cyclohexanamine. This study is the first to demonstrate the nematicidal activity of VOCs produced by D. flagrans against M. incognita, which indicates that D. flagrans has the potential to biocontrol plant root-knot nematodes"
Keywords:		Duddingtonia flagrans Meloidogyne incognita VOCs cyclohexanamine egg hatching nematode-trapping fungi;
Notes:		"PubMed-not-MEDLINEMei, Xiaoyu Wang, Xin Li, Guohong eng Switzerland 2021/11/28 Microorganisms. 2021 Oct 31; 9(11):2268. doi: 10.3390/microorganisms9112268"