Characterization of Fusarium species causing head blight of highland barley (qingke) in Tibet, China,International Journal of Food Microbiology

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Characterization of Fusarium species causing head blight of highland barley (qingke) in Tibet, China
International Journal of Food Microbiology ( IF 5.4 ) Pub Date : 2024-04-30 , DOI: 10.1016/j.ijfoodmicro.2024.110728
Sun Fuyao , Zhang Tangwei , Xing Yujun , Dai Chengcheng , Ciren Deji , Yang Xiaojun , Wu Xuelian , P. Mokoena Mduduzi , O. Olaniran Ademola , Shi Jianrong , Ma Changzhong , Xu Jianhong , Li Ying , Dong Fei

Most of the research on the characterization of species focused on wheat, barley, rice, and maize in China. However, there has been limited research in highland barley (qingke). Recently, Fusarium head blight (FHB) of qingke was recently observed in Tibet, China, especially around the Brahmaputra River. To gain a better understanding of the pathogens involver, 201 isolates were obtained from qingke samples in 2020. Among these isolates, the most abundant species was (45.3 %), followed by (27.8 %), (13.9 %), (9.0 %), (3.5 %), and (0.5 %). The distribution of species varied along the Brahmaputra River, with being predominant in the midstream and downstream regions, while was more common in the upstream region Chemical analyses of all the isolates revealed the production of different mycotoxins by various species. It was found that enniatins were produced by , , and , beauvericin (BEA) and fumonisins were produced and , and zearalenone (ZEN) and nivalenol (NIV) were produced by . Pathogenicity test showed that was more aggressive in causing FHB compared to , and . The disease severity, measured by the area under the disease progress curve (AUDPC), was significantly positively ( < 0.01) correlated with the concentration of total toxins produced by each species. Furthermore, all the strains which were used for pathogenicity test were susceptible to carbendazim, and the 50 % effective concentration (EC) ranged from 0.406 μg/mL to 0.673 μg/mL with an average EC of 0.551 ± 0.012 μg/mL.

更新日期：2024-04-30

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