The Plant Pathology Journal

한국식물병리학회 (The Korean Society of Plant Pathology)
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Analysis of Endophytic Bacterial Communities and Investigation of Core Taxa in Apple Trees

  • Yejin Lee (Division of Applied Life Science (BK21Plus), Gyeongsang National University) ;
  • Gyeongjun Cho (Division of Agricultural Microbiology, Department of Agricultural Biology, National Institute of Agriculture Science, Rural Development Administration) ;
  • Da-Ran Kim (Research Institute of Life Science, Gyeongsang National University) ;
  • Youn-Sig Kwak (Division of Applied Life Science (BK21Plus), Gyeongsang National University)
  • 투고 : 2023.05.05
  • 심사 : 2023.07.07
  • 발행 : 2023.08.01
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초록

Fire blight disease, caused by Erwinia amylovora, is a devastating affliction in apple cultivation worldwide. Chemical pesticides have exhibited limited effectiveness in controlling the disease, and biological control options for treating fruit trees are limited. Therefore, a relatively large-scale survey is necessary to develop microbial agents for apple trees. Here we collected healthy apple trees from across the country to identify common and core bacterial taxa. We analyzed the endophytic bacterial communities in leaves and twigs and discovered that the twig bacterial communities were more conserved than those in the leaves, regardless of the origin of the sample. This finding indicates that specific endophytic taxa are consistently present in healthy apple trees and may be involved in vital functions such as disease prevention and growth. Furthermore, we compared the community metabolite pathway expression rates of these endophyte communities with those of E. amylovora infected apple trees and discovered that the endophyte communities in healthy apple trees not only had similar community structures but also similar metabolite pathway expression rates. Additionally, Pseudomonas and Methylobacterium-Methylorobrum were the dominant taxa in all healthy apple trees. Our findings provide valuable insights into the potential roles of endophytes in healthy apple trees and inform the development of strategies for enhancing apple growth and resilience. Moreover, the similarity in cluster structure and pathway analysis between healthy orchards was mutually reinforcing, demonstrating the power of microbiome analysis as a tool for identifying factors that contribute to plant health.

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과제정보

This research was supported by an agenda research program by the Rural Development Administration (PJ014934).

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