Effect of Tebuconazole Enantiomers and Environmental Factors on Fumonisin Accumulation and FUM Gene Expression in Fusarium verticillioides

• DOI: 10.1021/acs.jafc.8b04900
• Publication Date: 2018-11-21T03:07:36Z
• Authors: Na Li; Junlong Zhao; Rui Zhang; Luqing Deng; Jianfang Li; Yan Gao; Chenglan Liu
• Keywords: Tebuconazole; Fumonisin

Fusarium verticillioides is an important corn pathogen that can produce fumonisins (FBs) under certain environmental conditions. In this study, we evaluated the enantioselective impact of tebuconazole enantiomers on growth and FB production F. maize-based media at different abiotic factors. The expression biosynthetic genes (FUM1 FUM6) was quantified by real-time reverse transcription polymerase chain reaction. results showed water activity (aw), temperature, types significantly affected verticillioides. order fungicidal (−)-tebuconazole > rac-tebuconazole (+)-tebuconazole. exhibited maximal selective (242-fold) against 0.95 aw 35 °C. Production fumonisin B1 (FB1) B2 (FB2) influenced aw, tebuconazole, dose. Under most conditions, stronger inhibition for FB1 FB2 than (+)-tebuconazole (1.87–2.85-fold reduction in FBs) rac-tebuconazole. optimal condition 0.99 25 Tebuconazole differently gene expression, but effects no positive correlation. present study provides a better understanding ways to minimize treated with fungicides.