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Qi H.,Mudanjiang Normal University | He G.,Mudanjang Tobacco Science Research Institute | Li H.,Mudanjang Tobacco Science Research Institute | Liu D.,Mudanjang Tobacco Science Research Institute | And 2 more authors.
Acta Tabacaria Sinica | Year: 2015

In order to study effects of continuous cropping of flue-cured tobacco on rhizosphere bacterial community structures. Rhizosphere soils of rotation and continuous cropping of tobacco at different growth stages were collected. V1-V3 partial sequences of bacterial 16S rDNA were analyzed by 454 pyrosequencing method. Results showed that, compared with rotation treatments, the relative abundance of Acidobacteria was higher in earlier growth stages and lower in later stages in continuous cropping of flue-cured tobacco, while the relative abundances of α-proteobacteria and Actinobacteria showed the opposite. The community richness (Chao) and diversity (Shannon) in continuous cropping were lower than those in rotation, suggesting that continuous cropping reduced bacterial community diversity. Principal component analysis and cluster analysis based on non-metric multidimensional scaling showed that bacterial communities changed with tobacco growth stages, and difference of community between continuous cropping and rotation was detected in earlier growth stages, not in later stages, suggesting that growth stage was the primary factor and continuous cropping or rotation was the second factor in determining tobacco rhizosphere bacterial community. ©, 2015, State Tobacco Monopoly Bureau and China Tobacco Society. All right reserved.

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