Symbiotic performance and induction of systemic resistance against Cercospora sojina in soybean plants co-inoculated with Bacillus sp. CHEP5 and Bradyrhizobium japonicum E109

TONELLI, MARÍA LAURA; MAGALLANES-NOGUERA, C.; FABRA, A.

ARCHIVES OF MICROBIOLOGY

SPRINGER

Año: 2017 vol. 199 p. 1283 - 1291

0302-8933

Soybean is an economically very important cropthroughout the word and particularly in Argentina. Soybeanyield may be affected by many factors such as the lack ofsome essential nutrients or pathogens attack. In this workwe demonstrated that the co-inoculation of the native biocontrol bacterium Bacillus sp. CHEP5 which induces resistance against Cercospora sojina in soybean and the nitrogen fxing 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 bioflmwhen both bacteria are growing together. Furthermore, Bacillus sp. CHEP5 inoculation did not affect Bradyrhizobium japonicum E109 symbiotic behavior and favonoids 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.