Assessment of functional diversity and structure of phytate-hydrolysing bacterial community in Lolium perenne rhizosphere

Sanguin Hervé, Wilson Neil L., Kertesz Michael A.. 2016. Assessment of functional diversity and structure of phytate-hydrolysing bacterial community in Lolium perenne rhizosphere. Plant and Soil, 401 (1) : 151-167.

Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/LN812266 / Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/LN812291

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : PLANT SCIENCES / Quartile : Q1, Sujet : SOIL SCIENCE

Note générale : Jeux de données enregistrés dans la base GenBank du numéro d'accès LN812266 au LN812290, LN812291 au LN812320

Résumé : Background and aims Plant growth is frequently limited by the availability of inorganic phosphorus (P) in the soil. In most soils, a considerable amount of the soil P is bound to organic molecules. Of these, phytate is the most abundant identifiable organic P form, but is not readily available to plants. In contrast, microorganisms have been shown to degrade phytate with high efficiency. The current study aims to characterize the members of the phytate-hydrolysing bacterial community in rhizosphere, and the molecular and enzymatic ability of these bacteria to degrade phytate. Methods and results The phytate-hydrolysing bacterial community was characterized from the rhizosphere of plants cultivated in the presence or absence of phytate supplementation. Major changes in the bacterial community structure were observed with both culturedependent and -independent methods, which highlighted the predominance of Proteobacteria and Actinobacteria. Phytase activity was detected for a range of rhizobacterial isolates as well as the presence of, β-propeller phytases (BPP) for both isolates and directly in a soil sample. Conclusion Awide taxonomic range of functional phytate utilizers have been discovered, in soil bacterial taxa that were previously not well known for their ability to utilise phytate as P or C sources. This study provides new insights into microbial carbon and phosphorus cycling in soil.

Mots-clés Agrovoc : rhizosphère, phosphore, Lolium perenne, cycle du carbone, phosphore disponible pour les plantes, communauté végétale, croissance, structure du sol, phytase

Classification Agris : P34 - Biologie du sol
F01 - Culture des plantes

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

Auteurs et affiliations

• Sanguin Hervé, CIRAD-BIOS-UMR LSTM (FRA)
• Wilson Neil L., University of Sydney (AUS)
• Kertesz Michael A., University of Manchester (GBR)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/577390/)

Métriques

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