Funding Information This work was funded by grants from the Ministry of Science and Innovation (Consolider-Ingenio CSD2007-00005; and Explora-Reverse) and FEDER from the Junta de Andalucía Grupo CVI-191).
Bacterial diversity in the rhizosphere of maize and the surrounding carbonate-rich bulk soil
Article first published online: 6 AUG 2012
© 2012 The Authors. Microbial Biotechnology © 2012 Society for Applied Microbiology and Blackwell Publishing Ltd
Volume 6, Issue 1, pages 36–44, January 2013
How to Cite
García-Salamanca, A., Molina-Henares, M. A., van Dillewijn, P., Solano, J., Pizarro-Tobías, P., Roca, A., Duque, E. and Ramos, J. L. (2013), Bacterial diversity in the rhizosphere of maize and the surrounding carbonate-rich bulk soil. Microbial Biotechnology, 6: 36–44. doi: 10.1111/j.1751-7915.2012.00358.x
- Issue published online: 18 DEC 2012
- Article first published online: 6 AUG 2012
- Manuscript Accepted: 10 JUL 2012
- Manuscript Revised: 2 JUL 2012
- Manuscript Received: 26 APR 2012
- Ministry of Science and Innovation. Grant Number: Consolider-Ingenio CSD2007-00005
- Junta de Andalucía. Grant Number: Grupo CVI-191
Maize represents one of the main cultivar for food and energy and crop yields are influenced by soil physicochemical and climatic conditions. To study how maize plants influence soil microbes we have examined microbial communities that colonize maize plants grown in carbonate-rich soil (pH 8.5) using culture-independent, PCR-based methods. We observed a low proportion of unclassified bacteria in this soil whether it was planted or unplanted. Our results indicate that a higher complexity of the bacterial community is present in bulk soil with microbes from nine phyla, while in the rhizosphere microbes from only six phyla were found. The predominant microbes in bulk soil were bacteria of the phyla Acidobacteria, Bacteroidetes and Proteobacteria, while Gammaproteobacteria of the genera Pseudomonas and Lysobacter were the predominant in the rhizosphere. As Gammaproteobacteria respond chemotactically to exudates and are efficient in the utilization of plants exudate products, microbial communities associated to the rhizosphere seem to be plant-driven. It should be noted that Gammaproteobacteria made available inorganic nutrients to the plants favouring plant growth and then the benefit of the interaction is common.