Cereal-legume intercropping modifies the dynamics of the active rhizospheric bacterial community

Taschen Elisa, Amenc Laurie, Tournier E., Deleporte Philippe, Malagoli Philippe, Fustec J., Bru David, Philippot Laurent, Bernard Laetitia. 2017. Cereal-legume intercropping modifies the dynamics of the active rhizospheric bacterial community. Rhizosphere, 3 (Part 1) : 191-195.

Résumé : We assessed the impact of intercropping on the microbial communities in the rhizosphere of wheat (Triticum turgidum L. ssp durum) and pea (Pisum sativum L.). Using a RNA based approach coupled with bacterial phylum specific real time PCR, we found that the active bacterial communities in the wheat-pea association were distinct from those in the rhizosphere when crops were cultivated solely. This first explorative study showed that intercropping induced a synergetic interaction, which modified the structure of active microbial communities associated with roots by reducing the representation of Alpha-Proteobacteria and Acidobacteria while promoting Actinobacteria. The latter phylum harbors many species identified as growth promoting bacteria, calling for further analyses to better understand their function for intercropped cultures.

Mots-clés Agrovoc : Triticum turgidum, rhizosphère, culture intercalaire, Triticum, évaluation de l'impact, Triticum aestivum, Pisum sativum, PCR

Classification Agris : F08 - Systèmes et modes de culture

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Taschen Elisa, INRA (FRA)
• Amenc Laurie, INRA (FRA)
• Tournier E., IRD (FRA)
• Deleporte Philippe, CIRAD-PERSYST-UMR Eco&Sols (FRA)
• Malagoli Philippe, INRA (FRA)
• Fustec J., INRA (FRA)
• Bru David, INRA (FRA)
• Philippot Laurent, INRA (FRA)
• Bernard Laetitia, IRD (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/584434/)

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