PuSH - Publication Server of Helmholtz Zentrum München: The seeds of <em>Plantago lanceolata</em> comprise a stable core microbiome along a plant richness gradient.

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Pinheiro Alves de Souza, Y. ; Schloter, M. ; Weisser, W.* ; Huang, Y.* ; Schulz, S.

The seeds of Plantago lanceolata comprise a stable core microbiome along a plant richness gradient.

Environ. Microbiome 19:11 (2024)

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BACKGROUND: Seed endophytic bacteria are beneficial to plants. They improve seedling growth by enhancing plant nutrient uptake, modulating stress-related phytohormone production, and targeting pests and pathogens with antibiotics. Seed endophyte composition can be influenced by pollination, plant cultivar, and soil physicochemical conditions. However, the effects of plant community richness on seed endophytes are unknown. To investigate the effects of increasing plant species richness on the diversity and composition of the seed microbiome, we made use of a well-established long-term biodiversity experiment in Germany (The Jena Experiment). We sampled seeds from different Plantago lanceolata blossoms in a plant diversity gradient ranging from monoculture to 16 species mixtures. The seeds were surface sterilized to remove seed surface-associated bacteria and subjected to a metabarcoding approach to assess bacterial community structure. RESULTS: Our data indicate a very stable core microbiome, which accounted for more than 90% of the reads and was present in all seeds independent of the plant richness level the seeds originated from. It consisted mainly of reads linked to Pseudomonas rhizosphaerae, Sphingomonas faeni and Pirellulla spp. 9% of the obtained reads were not part of the core microbiome and were only present in plots of specific diversity levels. The number of unique ASVs was positively correlated with plant richness. Interestingly, most reads described as non-core members belonged to the same genera described as the core microbiome, indicating the presence of different strains or species with possibly different functional properties important for seed performance. CONCLUSION: Our data indicate that Plantago lanceolata maintains a large seeds core microbiome across the plant richness gradient. However, the number of unique ASVs increases alongside the plant community richness, indicating that ecosystem biodiversity also mitigates diversity loss in seed endophytes.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Core Microbiome ; Plant Diversity Gradient ; Plantago Lanceolata ; Seed Microbiome; Biodiversity; Increases; Diversity; Dna

ISSN (print) / ISBN 2524-6372

e-ISSN 2524-6372

Journal Environmental Microbiome

Quellenangaben Volume: 19, Issue: 1, Article Number: 11

Publisher BioMed Central

Publishing Place Campus, 4 Crinan St, London N1 9xw, England

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit Comparative Microbiome Analysis (COMI)

Grants Technische Universitt Mnchen (1025)