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We thank J. Revilla for help with the rhizoboxes design, M. Perez-Serrano for assistance during harvesting, Gregor Liebsch for the support with VisiSens (TM) ScientifiCal Software management, A. Cera for useful comments on the results of the manuscript and V. Temperton and four anonymous referees for valuable comments to earlier versions of the manuscript.

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Ferrio, Juan PedroAuthor

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May 19, 2024
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Changes in soil microbiota alter root exudation and rhizosphere pH of the gypsum endemic Ononis tridentata L.

Publicated to:Plant And Soil. 505 (1-2): 581-594 - 2024-12-01 505(1-2), DOI: 10.1007/s11104-024-06691-x

Authors: de la Puente, L; Echevarria, L; Igual, JM; Ferrio, JP; Palacio, S

Affiliations

Ctr Invest & Tecnol Agroalimentaria Aragon CITA, ARAID, Ave Montanana,930, Zaragoza 505009, Spain - Author
Inst Pirena Ecol IPE CSIC, Ave Nuestra Senora Victoria,16, Huesca 22700, Spain - Author
Inst Recursos Nat & Agrobiol Salamanca CSIC, Salamanca, Spain - Author
Sistemas Agrícolas, Forestales y Medio Ambiente. Centro de Investigación y Tecnología Agroalimentaria de Aragón - Author
Univ Illes Balears, Fac Sci, Palma De Mallorca, Spain - Author
Univ Salamanca, Un Asociada Grp Interacc Planta Microorganismo, IRNASA, CSIC, Salamanca, Spain - Author
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Abstract

Background and aims Plants living on gypsum are adapted to uptake nutrients in extremely poor alkaline soils. Under such extreme conditions, processes affecting the chemical conditions of the rhizosphere may be crucial for plant survival and growth. Rhizosphere acidification in plants living on gypsum soils has never been reported before and the effect of root exudation and microbes on the rhizosphere pH remains undescribed. Methods In this study we cultivated seeds of the gypsum specialist Ononis tridentata in rhizoboxes with natural gypsum soil and with gypsum soil with reduced microbiota, and monitored changes in the rhizosphere pH with planar optodes coupled to a calibrated image recording system. Soil microbial life was estimated with PLFAs analyses and root exudation was characterised. Results The reduced microbiota treatment decreased both fungal and microbial presence. Plants grown in natural soil, with unaltered presence of soil microbiota, had lower rhizosphere pH. However, in the microbial-reduced treatment we found higher root exudation of several organic acids and alcohols such as malonic and isocitric acids and sorbitol-mannitol. Interestingly, plant biomass was not significantly altered by treatments. Conclusion The natural soil microbiota contributed to acidify alkaline gypsum soils, likely improving nutrient availability. However, O. tridentata seedlings grown in microbial-reduced soils seemed to compensate the effects of microbes through increased root exudation, attaining similar growth both in natural and microbial-reduced soils. These seedlings seemed to be adapted to soil where microbial abundance fluctuates.

Keywords

Am fungiAvailabilityBacterialCommunitiesComponentsEfficiencyFabaceaeFatty-acid analysisGamma-irradiationGypsum soilsMechanismOnonis tridentataPapilionoideaePh de la rizosferaPlantPlántulasRhizoboxRhizosphere acidificationSeedling rootSoil microbiotaYeso

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Plant And Soil due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position 14/49, thus managing to position itself as a Q1 (Primer Cuartil), in the category Soil Science.

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-04:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 8.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 13 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 1.5.
  • The number of mentions on the social network X (formerly Twitter): 3 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.