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Differences in phyllosphere microbiomes among different Populus spp. in the same habitat.

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Plant species significantly shape the phyllosphere bacterial community. Leaf nutrients like carbon, nitrogen, and phosphorus content are key factors influencing bacterial abundance and structure on plant surfaces.

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Area of Science:

  • Microbiology
  • Plant Science
  • Ecology

Background:

  • The phyllosphere, encompassing above-ground plant surfaces, hosts abundant microbial communities.
  • Phyllosphere bacteria are a dominant microbial group, with host plant species significantly influencing their diversity and structure.

Purpose of the Study:

  • To investigate how different *Populus* species affect phyllosphere bacterial communities.
  • To identify key leaf nutrient factors influencing bacterial community composition and abundance.

Main Methods:

  • Selected six *Populus* species grown under identical conditions.
  • Utilized 16S ribosomal RNA (rRNA) gene amplicon sequencing for DNA fragment analysis.
  • Assessed alpha-diversity, species abundance, and predicted metabolic functions.

Main Results:

  • Distinct *Populus* species harbored different phyllosphere bacterial communities.
  • Leaf carbon and soluble sugar content primarily affected bacterial community structure.
  • Leaf nitrogen, phosphorus, and C/N ratio influenced bacterial relative abundance.

Conclusions:

  • Host plant species is a critical determinant of phyllosphere bacterial communities.
  • Leaf nutrient composition directly impacts the structure and abundance of phyllosphere bacteria.
  • Findings support understanding microbial community dynamics in woody plants.