Abstract

ROMERO-PERDOMO, Felipe Andrés; CAMELO, Mauricio  and  BONILLA, Ruth. RESPONSE OF Bradyrhizobium japonicum TO ALGINATE IN PRESENCE OF PELLETED FUNGICIDES ON SOYBEAN SEEDS. rev.udcaactual.divulg.cient. [online]. 2015, vol.18, n.2, pp.359-364. ISSN 0123-4226.

The aim of this research was to determine the response of an inoculant based on strains of Bradyrhizobium japonicum with the addition of alginate in presence of Carbendazim® and Fludioxonil® pelleted fungicides in soybean seeds. The experiment consisted of eight treatments completely randomized with a 3x2 factorial arrangement with three replications by triplicate. Estimation of bacterial survival, as response variable, was performed at three times of drying: 0, 24 and 48 hours. Data were expressed as Log₁₀ (CFU/ mL). Results showed that the two fungicides significantly reduce (p<0.05) the viability of B . japonicum. Fludioxonil® presented a stronger inhibitory effect than Carbendazim® with more than 25% of reduction at 48 hours. Moreover, it was shown that alginate promotes the adherence over soybean seeds and bacteria protection, diminishing the fungicide inhibitory action (p<0.05) after 24 hours. These results suggest that application of polymers in bacteria inoculants are a promising alternative to reduce negative effects of fungicides over cellular viability.

Keywords : Inoculants; biopolymer; Benzimidazole; Phenyl- pyrrole.

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