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Bacterial communities within the rhizosphere and roots of vetiver Chrysopogon zizanioides L Roberty sampled at different growth stages

, : Bacterial communities within the rhizosphere and roots of vetiver Chrysopogon zizanioides L Roberty sampled at different growth stages. European Journal of Soil Biology 47(4): 0-242

Vetiver is a plant of Poaceae family known for its ability to produce essential oil in the roots which is especially used in the perfume industry. The composition and the amount of essential oil produced may vary depending on the microbial community associated with vetiver roots. This study aimed to evaluate the structure of total and diazotrophic bacterial communities inside the roots and in the rhizosphere of vetiver RAROS genotype at five plant growth stages by molecular methods (PCR DGGE and sequencing). The predominant bacterial community varied depending on plant age (mainly in the roots) and origin (bulk soil, rhizosphere soil. Highlights: Bacterial communities associated with vetiver RAROS genotype were evaluated by molecular methods. The predominant bacterial community varied depending on plant age and origin. The most dominant group associated with vetiver was affiliated with Gammaproteobacteria. The diazotrophic population was more influenced by root exudates than the total bacterial community. The Alphaproteobacteria class was dominant among the nifH-harboring population.


DOI: 10.1016/j.ejsobi.2011.05.006

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