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Microbiol Res

Title:		Comprehensive profiling of the VOCs of Trichoderma longibrachiatum EF5 while interacting with Sclerotium rolfsii and Macrophomina phaseolina
Author(s):		A PS; Thankappan S; G K; Uthandi S;
Address:		"Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, 641003, India. Biocatalysts Lab., Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, India. Biocatalysts Lab., Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, India. Electronic address: usiva@tnau.ac.in"
Journal Title:		Microbiol Res
Year:		2020
Volume:		20200302
Issue:
Page Number:		126436 -
DOI:		10.1016/j.micres.2020.126436
ISSN/ISBN:		1618-0623 (Electronic) 0944-5013 (Linking)
Abstract:		"Trichoderma longibrachiatum EF5 is an endophytic fungal antagonist of rice. It is used for the control of soil-borne fungal pathogens-Sclerotium rolfsii and Macrophomina phaseolina. We demonstrate that T. longibrachiatum EF5 inhibits the growth of these pathogens on direct interaction as well as via the production of the microbial volatile organic compounds (mVOCs). The mVOCs reduced mycelial growth and inhibited the production of sclerotia by altering the mycelial structure. We profiled 138 mVOCs, when T. longibrachiatum EF5 interacted with the two pathogens. During these interactions, several compounds are up- or downregulated by T. longibrachiatum EF5, including longifolene, caryophyllene,1-Butanol 2-methyl, cedrene, and cuprenene. These compounds are involved in the biosynthetic pathways of the sesquiterpenoid and alkane, and the degradation pathway of trimethylamine. We provide an insight into the multiple modes by which T. longibrachiatum EF5 exerts antagonistic actions, such as hyperparasitism, competitions, and antibiosis via mVOCs. In contrast to their antimicrobial properties, these metabolites could also promote plant growth"
Keywords:		Agaricales/*drug effects/growth & development *Antibiosis Ascomycota/*drug effects/growth & development Biological Control Agents Microbial Interactions Plant Diseases/microbiology Soil Microbiology Trichoderma/*metabolism Volatile Organic Compounds/chemi;
Notes:		"MedlineA P, Sridharan Thankappan, Sugitha G, Karthikeyan Uthandi, Sivakumar eng Germany 2020/03/18 Microbiol Res. 2020 Jun; 236:126436. doi: 10.1016/j.micres.2020.126436. Epub 2020 Mar 2"