Resumo A caracterização química da polpa, casca e sementes de cocona (Solanum sessiliflorum Dunal) foi determinada. No processamento artesanal da fruta foram obtidos 26.3% de casca e 9.7% de sementes. As sementes apresentaram um alto potencial para o desenvolvimento de produtos com valor agregado devido ao seu conteúdo de matéria seca (23,46%), como segue: carboidrato (69,37% base seca (b.s.)), nitrogênio (3,18 g/100 g de sementes, b.s.), K (0,023 g/100 g de sementes, b.s.), Fe (0,0185 g/100 g de sementes, b.s.) e fibra dietética (21,27 g/100g de sementes, b.s.). O teor de carboidrato, fibra dietética e conteúdos minerais da polpa, casca e sementes também evidenciaram o potencial agroindustrial da fruta, visto que estes constituintes podem ser usados para desenvolver alimentos funcionais, aditivos para alimentos, preparações para dietas funcionais e suplementos dietéticos.

Summary The chemical characterization of the pulp, peel and seeds of cocona (Solanum sessiliflorum Dunal) was determined. In artisanal fruit processing, 26.3% of peel and 9.7% of seeds were obtained. The seeds showed a high potential for the development of value-added products because of their dry matter contents (23.46%) as follows: carbohydrate (69.37% dry basis (d.b.)), nitrogen (3.18 g/100 g of seed d.b.), K (0.023 g/100 g of seed d.b.), Fe (0.0185 g/100 g of seed d.b.) and dietary fiber (21.27 g/100 g of seed d.b.). The carbohydrate, dietary fibre and mineral contents of the pulp, peel and seeds also highlighted the agroindustrial potential of the fruit in that these constituents could be used to develop functional foods, food additives, preparations for functional diets and dietary supplements.

Se evaluó la actividad antimicrobiana de Weissella confusa, una bacteria ácido láctica, contra Xanthomonas albilineans, microrganismo productor de la escaldadura de la hoja en la caña de azúcar. Se midió la cinética de fermentación de la bacteria ácido láctica en sustrato comercial (MRS) y en residuos agrícolas de cosecha de caña de azúcar (RAC) provenientes de semilleros con 7 meses de edad. Se realizaron fermentaciones sumergidas a 32 °C, cada hora hasta 4 horas, a pH 6 y 100 r.p.m. de agitación. Cada hora se midieron la producción de biomasa, el consumo de sustrato y actividad antimicrobiana. Weissella confusa presentó actividad antimicrobiana contra la bacteria fitopatógena X. albilineans en ambos sustratos, los halos de inhibición presentaron diámetros de 18.94 y 16.77 mm, respectivamente. Weissella confusa, aunque no fue aislada de caña de azúcar, mostró excelente crecimiento en el sustrato RAC comparado con el sustrato comercial MRS; por tanto, puede ser un posible biocontrolador para la escaldadura de la hoja de caña de azúcar, no obstante, se deben evaluar sus mecanismos de acción e impactos biológico y económico en la producción de biomasa ácido láctica.

The antimicrobial activity of Weissella confusa against Xanthomonas albilineans, microorganism that produces leaf scald in sugar cane, was evaluated. The fermentation kinetics of lactic acid bacteria in commercial substrate (MRS) and agricultural waste sugar cane harvest (RAC) was measured. Submerged fermentations were performed at 32 ° C for 4 hours, pH 6 and agitation of 100 rpm, and every hour the biomass production, substrate consumption and antimicrobial activity was measured. Weissella confusa showed antimicrobial activity against phytopathogenic bacteria X .albilineans in MRS and RAC as carbon sources, the inhibition halos diameters were 18.94 and 16.77 mm, respectively. Weissella confusa although not being isolated from sugar cane, showed excellent growth on the RAC substrate compared with the commercial substrate MRS. Therefore, it can be suggested W. confusa as a potential for biocontrol of leaf scald sugar cane, however, should be evaluated the mechanism of action and their biological and economic impacts. The RAC substrate becomes an economical alternative for the production of lactic acid biomass.