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Background <p>The anthosphere, also known as the floral microbiome, is a crucial component of the plant reproductive system. Therefore, understanding the anthospheric microbiome is essential to explore the diversity, interactions, and functions of wildflowers that coexist in natural habitats. We aimed to explore microbial interaction mechanisms and key drivers of microbial community structures using 144 flower samples from 12 different wild plant species inhabiting the same natural environment in South Korea.</p> Results <p>The microbial diversity of the anthosphere showed plant dependence, with the highest diversity observed in <i>Forsythia koreana</i>, indicating microbial dynamics in relation to plant species. <i>Caulobacter</i>, <i>Sphingomonas</i>, <i>Achromobacter</i>, <i>Epicoccum</i>, <i>Cladosporium</i>, and <i>Alternaria</i> were anthosphere generalists, suggesting that the local plant anthosphere had a similar microbial composition. Ecological network analysis revealed that anthosphere generalists were tightly coupled to each other and constructed core modules in the anthosphere. Functions associated with parasites and pathogens were commonly observed in the anthosphere, particularly in <i>Capsella bursa-pastoris</i> and <i>Brassica juncea</i>.</p> Conclusion <p>Overall, the anthosphere depends on the plant species and microbial generalists function as keystone species to support and connect the anthospheric microbiome in natural habitats.</p>

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Microbial generalists as keystone species: constructing core network modules in the anthosphere of twelve diverse wild plant species

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月14日

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  • Jihoon Kim,
  • Yingshun Cui,
  • Kyong-Hee Nam,
  • Jun-Woo Lee,
  • Jong-Geol Kim,
  • Seong-Jun Chun

摘要

Background

The anthosphere, also known as the floral microbiome, is a crucial component of the plant reproductive system. Therefore, understanding the anthospheric microbiome is essential to explore the diversity, interactions, and functions of wildflowers that coexist in natural habitats. We aimed to explore microbial interaction mechanisms and key drivers of microbial community structures using 144 flower samples from 12 different wild plant species inhabiting the same natural environment in South Korea.

Results

The microbial diversity of the anthosphere showed plant dependence, with the highest diversity observed in Forsythia koreana, indicating microbial dynamics in relation to plant species. Caulobacter, Sphingomonas, Achromobacter, Epicoccum, Cladosporium, and Alternaria were anthosphere generalists, suggesting that the local plant anthosphere had a similar microbial composition. Ecological network analysis revealed that anthosphere generalists were tightly coupled to each other and constructed core modules in the anthosphere. Functions associated with parasites and pathogens were commonly observed in the anthosphere, particularly in Capsella bursa-pastoris and Brassica juncea.

Conclusion

Overall, the anthosphere depends on the plant species and microbial generalists function as keystone species to support and connect the anthospheric microbiome in natural habitats.