Occurrence of Fusarium mycotoxins in freshly harvested highland barley (qingke) grains from Tibet, China

文献类型： 外文期刊

第一作者： Zhang, T. W.

作者： Zhang, T. W.;Hao, Z. H.;Wu, X. L.;Li, Y.;Wu, D. L.;Xing, Y. J.;Shi, J. R.;Dong, F.;Li, W. D.;Li, Y.

作者机构：

关键词： Qingke; Fusarium mycotoxins; Environmental factor; Crop rotation

期刊名称：MYCOTOXIN RESEARCH （ 影响因子：3.0； 五年影响因子：3.9 ）

ISSN： 0178-7888

年卷期： 2023 年 39 卷 3 期

页码：

收录情况： SCI

摘要： Highland barley, also called "qingke" in Tibetan, is mainly cultivated in the Tibetan Plateau of China and has been used as a major staple food for Tibetans. Recently, Fusarium head blight (FHB) of qingke was frequently observed around the Brahmaputra River in Tibet. Considering the importance of qingke for Tibetans, the assessment of Fusarium mycotoxin contamination is essential for food safety. In this study, a total of 150 freshly harvested qingke grain samples were obtained from three regions around the Brahmaputra River in Tibet (China) in 2020. The samples were investigated for the occurrence of 20 Fusarium mycotoxins using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The most frequently occurring mycotoxin was enniatin B (ENB) (46%), followed by enniatin B-1 (ENB1) (14.7%), zearalenone (ZEN) (6.0%), enniatin A(1) (ENA(1)) (3.3%), enniatin A (ENA) (1.3%), beauvericin (BEA) (0.7%), and nivalenol (NIV) (0.7%). Due to the increase in altitude, the cumulative precipitation level and average temperature decreased from the downstream to the upstream of the Brahmaputra River; this directly correlated to the contamination level of ENB in qingke, which gradually decreased from downstream to upstream. In addition, the level of ENB in qingke obtained from qingke-rape rotation was significantly lower than that from qingke-wheat and qingke-qingke rotations (p < 0.05). These results disseminated the occurrence of Fusarium mycotoxins and provided further understanding of the effect of environmental factors and crop rotation on Fusarium mycotoxins.

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