| Title | Increased exopolysaccharide production and microbial activity affect soil water retention and field performance of tomato under water deficit |
| Publication Type | Journal Article |
| Year of Publication | 2021 |
| Authors | Le Gall S., Bérard A., Page D., Lanoe L., Bertin N., Doussan C. |
| Journal | Rhizosphere |
| Volume | 19 |
| Pagination | 12 |
| Date Published | Sep |
| Type of Article | Article |
| Accession Number | WOS:000701883700001 |
| Keywords | aggregation, Agriculture, communities, drought, Exopolysaccharide, exudation, improvement, irrigation, Microbial activity, MICRORESP(TM), Plant Sciences, plant-growth, rhizosphere, root traits, Soil water retention, Water deficit, YIELD |
| Abstract | According to the literature, biological processes in the rhizosphere could play a role in the adaptation of plants to droughts under a changing climate. A previous study has identified significantly different productivity level and fruit quality for two tomato varieties under water deficit conditions. We conducted a field study, with and without water deficit, with these two varieties to examine whether microbiological activity and exopolysaccharides concentration could affect soil hydrophysical properties. The rhizosphere soil had indeed distinct bio-chemical and hydrophysical properties between the two cultivars and between the two water-related conditions. The quantity of soil exopolysaccharide and/or nitrogenous substances, and the activity of microorganisms (fungi in particular) explains part of the soil water retention measurements. In addition, these mechanisms are significantly accentuated for the cultivar with the best productive capability under water-limited condition-i.e. with commercial yield, fruit dry matter and water use efficiency which are respectively 35%, 28%, and 31% higher for the productive cultivar. |
| Short Title | RhizosphereRhizosphere |
| Alternate Journal | Rhizosphere |
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- Increased exopolysaccharide production and microbial activity affect soil water retention and field performance of tomato under water deficit
Increased exopolysaccharide production and microbial activity affect soil water retention and field performance of tomato under water deficit
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Le Gall, S. Berard, A. Page, D. Lanoe, L. Bertin, N. Doussan, C.
Structure Federative de Recherche Tersys (Avignon, France)
This study was supported by the Structure Federative de Recherche Tersys (Avignon, France). We thank our INRAE colleagues of the unities EMMAH and SQPOV and PSH for their scientific and technical advices and supports (A.L. Franciullino, T. Clavel, S. Bureau, L. Capowiez, A. Chapelet, B. Doublet, C. Le Bourvellec, L. Touloumet) , as well as the trainees (A. Davoine, J. Thorel) and members of the UMR EMMAH for their help in sampling campaigns and the physico-chemical and micro-biological characterization of soils. We wish to thank the Societe Nationale Interprofessionnelle de la Tomate (SONITO) (R. Giovinazzo, F. Avril) for providing their experimental agricultural site and for their support for the operational set up of the experiment, the monitoring and plant and yield measurements.
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Le Gall, S (corresponding author), Forschungszentrum Julich, Agrosphere IBG 3, Julich, Nrw, Germany.
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