Tonelli María Laura, Magallanes-Noguera C, Fabra A
Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal 3, 5800, Río Cuarto, Córdoba, Argentina.
Arch Microbiol. 2017 Nov;199(9):1283-1291. doi: 10.1007/s00203-017-1401-2. Epub 2017 Jun 22.
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.
大豆在全球尤其是阿根廷是一种经济上非常重要的作物。大豆产量可能受到许多因素的影响，如缺乏某些必需营养元素或病原体侵袭。在这项研究中，我们证明了本地生防细菌芽孢杆菌属CHEP5（其可诱导大豆对大豆尾孢菌产生抗性）与固氮菌株慢生根瘤菌E109共同接种，在降低蛙眼病严重程度方面比单独接种生防菌剂更有效。这可能与两种细菌共同生长时形成生物膜能力的增强有关。此外，接种芽孢杆菌属CHEP5并不影响慢生根瘤菌E109的共生行为以及病原体侵染植物根系分泌物中的类黄酮成分。这些结果表明，将根瘤菌与生防菌剂共同接种植物可能是在可持续系统中提高大豆产量的一种策略。
