Associations between phloem microbiota and metabolomes in three North American ash species (Fraxinus spp.) susceptible to emerald ash borer (Agrilus planipennis).

Although the bacterial community in phloem also did not show significant differences between any of the phloem sample types, the alpha-diversity in Gallery samples from green ash showed a trend of lower diversity compared to Phloem, as reflected in both the Shannon Green-P (mean: 5.46 ± 0.31) versus Green-G (mean: 4.15 ± 0.59): p = 0.024, adj. p = 0.18) and Simpson (Green-P (mean: 0.99 ± 0.01) versus Green-G (mean: 0.90 ± 0.04): p = 0.04, adj. p = 0.19) indices.

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