ArticleArchives of microbiology2026
Biocontrol potential of phyllosphere fungi from diseased leaves against Colletotrichum gloeosporioides and Pseudocryphonectria elaeocarpicola.
Article in Archives of microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Camellia oleifera and Elaeocarpus decipiens are significant economic crops in South China. However, their production is severely impacted by diseases caused by Colletotrichum gloeosporioides or Pseudocryphonectria elaeocarpicola, respectively. The phyllosphere microbiota of diseased plants represents an underexplored reservoir of functional microorganisms with bioactive potential. However, no prior studies have investigated antagonistic microorganisms from these communities against both pathogens. In this study, 45 fungal strains were isolated from six species of diseased plants in southern China. Their ability to produce secondary metabolites was evaluated using high-performance liquid chromatography (HPLC), leading to the selection of 20 strains with complex and unique chromatographic profiles as bioactive candidates. Dual-culture assays revealed that nine strains exhibited significant antagonism against C. gloeosporioides, producing extracellular antifungal metabolites with maximum antagonistic index of 218.64 ± 26.36% and inhibition rate of 57.92 ± 0.77%. Eight strains showed marked antagonistic activity against P. elaeocarpicola, also secreting antifungal compounds, with maximum antagonistic index of 106.66 ± 16.83 and inhibition rate of 74.99 ± 0.23%. Notably, strains DP13, DP14, and DP16 strongly inhibited both pathogens. Phylogenetic analysis identified the nine highly antagonistic strains as Diaporthe sp. (DP13), Chaetomium globosum (DP14), Muyocopron dipterocarpi (DP15), Muyocopron lithocarpi (DP16), Fusarium equiseti (DP20), Neopestalotiopsis sp. (DP28), Fusarium lateritium (DP32, DP33), and Diaporthe heliconiae (DP43). This study provides insights into exploring functional microorganisms from diseased phyllosphere microbiota and offers valuable resources for eco-friendly management of camellia anthracnose and Elaeocarpus blight, with DP13, DP14, and DP16 as promising broad-spectrum biocontrol candidates.
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