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Front Microbiol

Title:		High Efficacy of the Volatile Organic Compounds of Streptomyces yanglinensis 3-10 in Suppression of Aspergillus Contamination on Peanut Kernels
Author(s):		Lyu A; Yang L; Wu M; Zhang J; Li G;
Address:		"State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China. Key Laboratory of Plant Pathology of Hubei Province, Wuhan, China. School of Life Sciences and Technology, Hubei Engineering University, Xiaogan, China"
Journal Title:		Front Microbiol
Year:		2020
Volume:		20200206
Issue:
Page Number:		142 -
DOI:		10.3389/fmicb.2020.00142
ISSN/ISBN:		1664-302X (Print) 1664-302X (Electronic) 1664-302X (Linking)
Abstract:		"Aspergillus flavus and Aspergillus parasiticus are saprophytic fungi which can infect and contaminate preharvest and postharvest food/feed with production of aflatoxins (B(1), B(2), and G). They are also an opportunistic pathogen causing aspergillosis diseases of animals and humans. In this study, the volatile organic compounds (VOCs) from Streptomyces yanglinensis 3-10 were found to be able to inhibit mycelial growth, sporulation, conidial germination, and expression of aflatoxin biosynthesis genes in A. flavus and A. parasiticus in vitro. On peanut kernels, the VOCs can also reduce the disease severity and inhibit the aflatoxins production by A. flavus and A. parasiticus under the storage conditions. Scanning electron microscope (SEM) observation showed that high dosage of the VOCs can inhibit conidial germination and colonization by the two species of Aspergillus on peanut kernels. The VOCs also showed suppression of mycelial growth on 18 other plant pathogenic fungi and one Oomycetes organism. By using SPME-GC-MS, 19 major VOCs were detected, like in other Streptomyces, 2-MIB was found as the main volatile component among the detected VOCs. Three standard chemicals, including methyl 2-methylbutyrate (M2M), 2-phenylethanol (2-PE), and beta-caryophyllene (beta-CA), showed antifungal activity against A. flavus and A. parasiticus. Among them, M2M showed highest inhibitory effect than other two standard compounds against conidial germination of A. flavus and A. parasiticus. To date, this is the first record about the antifungal activity of M2M against A. flavus and A. parasiticus. The VOCs from S. yanglinensis 3-10 did not affect growth of peanut seedlings. In conclusion, our results indicate that S. yanglinensis 3-10 may has a potential to become a promising biofumigant in for control of A. flavus and A. parasiticus"
Keywords:		Aspergillus Streptomyces yanglinensis 3-10 antifungal activity biofumigant methyl 2-methylbutyrate volatile organic compounds;
Notes:		"PubMed-not-MEDLINELyu, Ang Yang, Long Wu, Mingde Zhang, Jing Li, Guoqing eng Switzerland 2020/03/03 Front Microbiol. 2020 Feb 6; 11:142. doi: 10.3389/fmicb.2020.00142. eCollection 2020"