Microbiome of Nodules and Roots of Soybean and Common Bean: Searching for Differences Associated with Contrasting Performances in Symbiotic Nitrogen Fixation.

Biological nitrogen fixation (BNF) is a key process for the N input in agriculture, with outstanding economic and environmental benefits from the replacement of chemical fertilizers. However, not all symbioses are equally effective in fixing N, and a major example relies on the high contribution associated with the soybean (, contrasting with the low rates reported with the common bean () crop worldwide. Understanding these differences represents a major challenge that can help to design strategies to increase the contribution of BNF, and next-generation sequencing (NGS) analyses of the nodule and root microbiomes may bring new insights to explain differential symbiotic performances.

Genetic variation in symbiotic islands of natural variant strains of soybean and differing in competitiveness and in the efficiency of nitrogen fixation.

Soybean is the most important legume cropped worldwide and can highly benefit from the biological nitrogen fixation (BNF) process. Brazil is recognized for its leadership in the use of inoculants and two strains, CPAC 15 (=SEMIA 5079) and CPAC 7 (=SEMIA 5080) compose the majority of the 70 million doses of soybean inoculants commercialized yearly in the country. We studied a collection of natural variants of these two strains, differing in properties of competitiveness and efficiency of BNF.

IgG reactivity profile to spp. antigens in people with asymptomatic Paracoccidioidomycosis.

Paracoccidioidomycosis (PCM) is a systemic mycosis caused by spp. As the disease is known to affect mostly men over 40 years old who previously worked handling soil, some cities of agricultural economy in endemic regions may have more cases of paracoccidioidal infection. The true frequency of PCM cannot be established in Brazil because it is not a disease of mandatory reporting.

Impact of pesticides in properties of Bradyrhizobium spp. and in the symbiotic performance with soybean.

Soybean [Glycine max (L.) Merr.] has great economic and nutritional importance mainly due to its high protein content.