Relationship Between Mycotoxin Production and Gene Expression in Fusarium graminearum Species Complex Strains Under Various Environmental Conditions
文献类型： 外文期刊
作者： Huang, Wenwen 1 ; Zhou, Ping 1 ; Shen, Guanghui 2 ; Gao, Tao 2 ; Liu, Xin 1 ; Shi, Jianrong 1 ; Xu, Jianhong 1 ; Qiu, Jianbo 1 ;
作者机构： 1.Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang 212013, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, Collaborat Innovat Ctr Modern Grain Circulat & Saf, Minist Agr & Rural Affairs,Minist Sci & Technol,St, Nanjing 210014, Peoples R China
关键词： Fusarium graminearum species complex; Water activity; Temperature; Mycotoxin; Gene expression
期刊名称：JOURNAL OF MICROBIOLOGY （ 影响因子：3.0； 五年影响因子：3.7 ）
ISSN： 1225-8873
年卷期： 2023 年 61 卷 5 期
页码：
收录情况： SCI
摘要： The Fusarium graminearum species complex (FGSC) can produce various mycotoxins and is a major concern for food quantity and quality worldwide. In this study, we determined the effects of water activity (a(w)), temperature, incubation time and their interactions on mycotoxin accumulation and the expression levels of biosynthetic genes in FGSC strains from maize samples in China. The highest deoxynivalenol (DON), 3-acetyldeoxynivalenol(3ADON) and 15-acetyldeoxynivalenol (15ADON) levels of the F. boothii and F. graminearum strains were observed at 0.98 a(w)/30 degrees C or 0.99 a(w)/25 degrees C. F. asiaticum and F. meridionale reached maximum nivalenol (NIV) and 4-acetylnivalenol (4ANIV) contents at 0.99 a(w) and 30 degrees C. With the extension of the incubation time, the concentrations of DON and NIV gradually increased, while those of their derivatives decreased. F. boothii, F. meridionale and one F. asiaticum strain had the highest zearalenone (ZEN) values at 0.95 a(w) and 25 degrees C, while the optimum conditions for the other F. asiaticum strain and F. graminearum were 0.99 a(w) and 30 degrees C. Four genes associated with trichothecene and zearalenone synthesis were significantly induced under higher water stress in the early stage of production. The results indicated independence of mycotoxin production and gene expression, as maximum amounts of these toxic metabolites were observed at higher a(w) in most cases. This study provides useful information for the monitoring and prevention of such toxins entering the maize production chain.
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