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Coral endosymbiont growth is enhanced by metabolic interactions with bacteria

Author

Listed:
  • Jennifer L. Matthews

    (University of Technology Sydney)

  • Abeeha Khalil

    (University of Technology Sydney)

  • Nachshon Siboni

    (University of Technology Sydney)

  • Jeremy Bougoure

    (University of Western Australia)

  • Paul Guagliardo

    (University of Western Australia)

  • Unnikrishnan Kuzhiumparambil

    (University of Technology Sydney)

  • Matthew DeMaere

    (University of Technology Sydney)

  • Nine M. Le Reun

    (University of Technology Sydney)

  • Justin R. Seymour

    (University of Technology Sydney)

  • David J. Suggett

    (University of Technology Sydney
    King Abdullah University of Science and Technology)

  • Jean-Baptiste Raina

    (University of Technology Sydney)

Abstract

Bacteria are key contributors to microalgae resource acquisition, competitive performance, and functional diversity, but their potential metabolic interactions with coral microalgal endosymbionts (Symbiodiniaceae) have been largely overlooked. Here, we show that altering the bacterial composition of two widespread Symbiodiniaceae species, during their free-living stage, results in a significant shift in their cellular metabolism. Indeed, the abundance of monosaccharides and the key phytohormone indole-3-acetic acid (IAA) were correlated with the presence of specific bacteria, including members of the Labrenzia (Roseibium) and Marinobacter genera. Single-cell stable isotope tracking revealed that these two bacterial genera are involved in reciprocal exchanges of carbon and nitrogen with Symbiodiniaceae. We identified the provision of IAA by Labrenzia and Marinobacter, and this metabolite caused a significant growth enhancement of Symbiodiniaceae. By unravelling these interkingdom interactions, our work demonstrates how specific bacterial associates fundamentally govern Symbiodiniaceae fitness.

Suggested Citation

  • Jennifer L. Matthews & Abeeha Khalil & Nachshon Siboni & Jeremy Bougoure & Paul Guagliardo & Unnikrishnan Kuzhiumparambil & Matthew DeMaere & Nine M. Le Reun & Justin R. Seymour & David J. Suggett & J, 2023. "Coral endosymbiont growth is enhanced by metabolic interactions with bacteria," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42663-y
    DOI: 10.1038/s41467-023-42663-y
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    References listed on IDEAS

    as
    1. S. A. Amin & L. R. Hmelo & H. M. van Tol & B. P. Durham & L. T. Carlson & K. R. Heal & R. L. Morales & C. T. Berthiaume & M. S. Parker & B. Djunaedi & A. E. Ingalls & M. R. Parsek & M. A. Moran & E. V, 2015. "Interaction and signalling between a cosmopolitan phytoplankton and associated bacteria," Nature, Nature, vol. 522(7554), pages 98-101, June.
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