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2023 Volume 2 Issue 6
Article Contents

WU Xiaojun, WANG Hancheng, LIN Musen, et al. Effect of Difenoconazole on the Diversity of Phyllosphere Microbial Communities of Leaf Infected with Tobacco Taget Spot[J]. PLANT HEALTH AND MEDICINE, 2023, (6): 1-12. doi: 10.13718/j.cnki.zwyx.2023.06.001
Citation: WU Xiaojun, WANG Hancheng, LIN Musen, et al. Effect of Difenoconazole on the Diversity of Phyllosphere Microbial Communities of Leaf Infected with Tobacco Taget Spot[J]. PLANT HEALTH AND MEDICINE, 2023, (6): 1-12. doi: 10.13718/j.cnki.zwyx.2023.06.001

Effect of Difenoconazole on the Diversity of Phyllosphere Microbial Communities of Leaf Infected with Tobacco Taget Spot

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  • Received Date: 20/11/2023
  • MSC: S154.3;S572

  • In order to investigate the changing patterns of the phyllosphere microbial community of tobacco infected with tobacco target spot after difenoconazole treatment, this paper analyzed the community structure and diversity of phyllosphere microbial communities in diseased and healthy tobacco leaves at different periods after difenoconazole treatment by using high-throughput sequencing technology. The results showed that the number of dominant genera of fungi and bacterium increased in the diseased and healthy tobacco leaves compared to those before treatment. The dominant genera of fungi were distributed in Basidiomycota and Ascomycota, and the dominant genera of bacterium were distributed in Proteobacteria. The relative abundance of dominant genera of fungi and bacterium in the diseased and healthy tobacco leaves differed at different time points from 1 to 18 days after difenoconazole (90 g/hm2) treatment, but the overall trend was consistent. In the fungal community, the relative abundance was in a decreasing-increasing-decreasing trend for Thanatephorus, an increasing-decreasing trend for Plectosphaerella, Sampaiozyma, Symmetrospora, Pleurotus and Alternaria, and a decreasing trend for Cercospora. In the bacterial community, the relative abundance was in an increasing-decreasing-increasing-decreasing trend for Pseudomonas, Sphingomonas and Curtobacterium, and an increasing-decreasing trend for Pantoea and Methylobacterium. The diversity and richness of the phyllosphere fungal and bacterial communities of diseased and healthy tobacco leaves changed synchronously, with an overall increasing-decreasing trend, and the differences in the diversity and richness of the phyllosphere fungal communities of diseased and healthy tobacco gradually decreased. In summary, the overall changes in the structure and diversity of the phyllosphere fungal and bacterial communities in diseased and healthy tobacco were similar after difenoconazole treatment, and the differences in the phyllosphere fungal and bacterial communities between diseased and healthy tobacco decreased with the extension of time.
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Effect of Difenoconazole on the Diversity of Phyllosphere Microbial Communities of Leaf Infected with Tobacco Taget Spot

Abstract: In order to investigate the changing patterns of the phyllosphere microbial community of tobacco infected with tobacco target spot after difenoconazole treatment, this paper analyzed the community structure and diversity of phyllosphere microbial communities in diseased and healthy tobacco leaves at different periods after difenoconazole treatment by using high-throughput sequencing technology. The results showed that the number of dominant genera of fungi and bacterium increased in the diseased and healthy tobacco leaves compared to those before treatment. The dominant genera of fungi were distributed in Basidiomycota and Ascomycota, and the dominant genera of bacterium were distributed in Proteobacteria. The relative abundance of dominant genera of fungi and bacterium in the diseased and healthy tobacco leaves differed at different time points from 1 to 18 days after difenoconazole (90 g/hm2) treatment, but the overall trend was consistent. In the fungal community, the relative abundance was in a decreasing-increasing-decreasing trend for Thanatephorus, an increasing-decreasing trend for Plectosphaerella, Sampaiozyma, Symmetrospora, Pleurotus and Alternaria, and a decreasing trend for Cercospora. In the bacterial community, the relative abundance was in an increasing-decreasing-increasing-decreasing trend for Pseudomonas, Sphingomonas and Curtobacterium, and an increasing-decreasing trend for Pantoea and Methylobacterium. The diversity and richness of the phyllosphere fungal and bacterial communities of diseased and healthy tobacco leaves changed synchronously, with an overall increasing-decreasing trend, and the differences in the diversity and richness of the phyllosphere fungal communities of diseased and healthy tobacco gradually decreased. In summary, the overall changes in the structure and diversity of the phyllosphere fungal and bacterial communities in diseased and healthy tobacco were similar after difenoconazole treatment, and the differences in the phyllosphere fungal and bacterial communities between diseased and healthy tobacco decreased with the extension of time.

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