Journal
ARCHIVES OF MICROBIOLOGY
Volume 199, Issue 9, Pages 1283-1291Publisher
SPRINGER
DOI: 10.1007/s00203-017-1401-2
Keywords
Soybean; Bacillus sp.; Cercospora sojina; Induced systemic resistance; Bradyrhizobium japonicum E109; Nodulation
Categories
Funding
- SECyT-UNRC
- CONICET
- Ministerio de Ciencia y Tecnologia de Cordoba
- ANPCyT
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Soybean is an economically very important crop throughout the word and particularly in Argentina. Soybean yield may be affected by many factors such as the lack of some essential nutrients or pathogens attack. In this work we demonstrated that the co-inoculation of the native biocontrol bacterium Bacillus sp. CHEP5 which induces resistance against Cercospora sojina in soybean and the nitrogen fixing strain Bradyrhizobium japonicum E109, was more effective in reducing frog leaf spot severity than the inoculation of the biocontrol agent alone. Probably, this is related with the increase in the ability to form biofilm when both bacteria are growing together. Furthermore, Bacillus sp. CHEP5 inoculation did not affect Bradyrhizobium japonicum E109 symbiotic behavior and flavonoids composition of root exudates in pathogen challenged plants. These results suggest that co-inoculation of plants with rhizobia and biocontrol agents could be a strategy to improve soybean production in a sustainable system.
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