Shared features and reciprocal complementation of the Chlamydomonas and Arabidopsis microbiota

Paloma Durán, José Flores-Uribe, Kathrin Wippel, Pengfan Zhang, Rui Guan, Barbara Melkonian, Michael Melkonian and Ruben Garrido-Oter ()
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Paloma Durán: Max Planck Institute for Plant Breeding Research
José Flores-Uribe: Max Planck Institute for Plant Breeding Research
Kathrin Wippel: Max Planck Institute for Plant Breeding Research
Pengfan Zhang: Max Planck Institute for Plant Breeding Research
Rui Guan: Max Planck Institute for Plant Breeding Research
Barbara Melkonian: Max Planck Institute for Plant Breeding Research
Michael Melkonian: Max Planck Institute for Plant Breeding Research
Ruben Garrido-Oter: Max Planck Institute for Plant Breeding Research

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: Abstract Microscopic algae release organic compounds to the region immediately surrounding their cells, known as the phycosphere, constituting a niche for colonization by heterotrophic bacteria. These bacteria take up algal photoassimilates and provide beneficial functions to their host, in a process that resembles the establishment of microbial communities associated with the roots and rhizospheres of land plants. Here, we characterize the microbiota of the model alga Chlamydomonas reinhardtii and reveal extensive taxonomic and functional overlap with the root microbiota of land plants. Using synthetic communities derived from C. reinhardtii and Arabidopsis thaliana, we show that phycosphere and root bacteria assemble into taxonomically similar communities on either host. We show that provision of diffusible metabolites is not sufficient for phycosphere community establishment, which additionally requires physical proximity to the host. Our data suggest the existence of shared ecological principles driving the assembly of the A. thaliana root and C. reinhardtii phycosphere microbiota, despite the vast evolutionary distance between these two photosynthetic organisms.

Date: 2022
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DOI: 10.1038/s41467-022-28055-8

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