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Exploring the Root-Associated Bacterial Community of Tomato Plants in Response to Salt Stress

Author

Listed:
  • Antonia Esposito

    (Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics (CREA-AA), 50125 Florence, Italy)

  • Valeria Scala

    (Research Centre for Plant Protection and Certification, Council for Agricultural Research and Economics (CREA-DC), 00156 Rome, Italy)

  • Francesco Vitali

    (Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics (CREA-AA), 50125 Florence, Italy)

  • Marzia Beccaccioli

    (Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy)

  • Massimo Reverberi

    (Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy)

  • Giuseppe Valboa

    (Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics (CREA-AA), 50125 Florence, Italy)

  • Sara Del Duca

    (Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics (CREA-AA), 50125 Florence, Italy)

  • Loredana Canfora

    (Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics (CREA-AA), 00184 Rome, Italy)

  • Stefano Mocali

    (Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics (CREA-AA), 50125 Florence, Italy)

Abstract

Salinity is one of the main abiotic stresses that limits plant growth. This study addressed how the composition and diversity of root-associated bacterial communities reacts over time to salt-induced stress conditions. To understand its adaptation to soil salinization, the microbiome was studied by total DNA extraction and sequencing, using the Illumina MiSeq platform. Additionally, we evaluated the plant metabolites associated with salt stress (oxylipins, fatty acids (FAs) and hormones) by mass spectrometry. Salinity reduced rhizosphere bacterial diversity in salt-treated plants at 7 and 14 days and triggered a progressive shift of the bacterial structure, starting 7 days after salt stress imposed. The bacterial rhizosphere community became enriched with specific bacteria associated with potential genes involved in the PGP trait and ion homeostasis. For these plants, metabolites that showed higher levels included 9-lipoxygenase (LOX) oxylipins, which were found at days 7 and 14. The results indicated that salinity seems to have induced changes in the rhizosphere bacterial community, with characteristics that may help the plant respond to the imposed stress. Furthermore, our study highlighted the role of 9-LOX oxylipins in responding to salinity stress, providing new insights into the complex plant–microbe interactions under salt stress.

Suggested Citation

  • Antonia Esposito & Valeria Scala & Francesco Vitali & Marzia Beccaccioli & Massimo Reverberi & Giuseppe Valboa & Sara Del Duca & Loredana Canfora & Stefano Mocali, 2025. "Exploring the Root-Associated Bacterial Community of Tomato Plants in Response to Salt Stress," Agriculture, MDPI, vol. 15(6), pages 1-22, March.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:6:p:624-:d:1613070
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    References listed on IDEAS

    as
    1. Sara Del Duca & Stefano Mocali & Francesco Vitali & Arturo Fabiani & Maria Alexandra Cucu & Giuseppe Valboa & Giada d’Errico & Francesco Binazzi & Paolo Storchi & Rita Perria & Silvia Landi, 2024. "Impacts of Soil Management and Sustainable Plant Protection Strategies on Soil Biodiversity in a Sangiovese Vineyard," Land, MDPI, vol. 13(5), pages 1-20, April.
    2. Katerji, N. & van Hoorn, J. W. & Hamdy, A. & Mastrorilli, M., 2003. "Salinity effect on crop development and yield, analysis of salt tolerance according to several classification methods," Agricultural Water Management, Elsevier, vol. 62(1), pages 37-66, August.
    3. Luke R. Thompson & Jon G. Sanders & Daniel McDonald & Amnon Amir & Joshua Ladau & Kenneth J. Locey & Robert J. Prill & Anupriya Tripathi & Sean M. Gibbons & Gail Ackermann & Jose A. Navas-Molina & Ste, 2017. "A communal catalogue reveals Earth’s multiscale microbial diversity," Nature, Nature, vol. 551(7681), pages 457-463, November.
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