Microflora associada aos grãos de café em coco e beneficiado produzidos no Paraná

Abstract

The contamination of coffee grains for microorganisms can compromise a lot the coffee beverage quality; being with that very important to evaluate this product qualitatively. The purpose of the present study was identifying the microorganisms associated to the fruits of coffee in coconut and benefited ones harvested in farmings installed in soils originated of the basalt and the Caiuá sandstone. The filter paper, Blotter Test method was used and the fungi were identified by morphologic characteristics observed on stereoscopic and optical microscopes. The tracing used was the entirely casualized in factorial scheme (2 x 4) two soils (basaltic x arenaceous soils) x four processes (benefited and coconut, both with and without asepsis), totalizing eight treatments. For each treatment it was evaluated 10 repetitions of 20 seeds each. In the samples deriving from soils of basaltic origin it was observed greater amounts of Alternaria sp., Aspergillus sp., Aspergillus niger, Aspergillus ochraceus, Aspergillus flavus and Colletotrichum sp. The only microorganism that had prevalence for coffees originated of arenaceous soil was the Rhizoctonia sp. In a general way, the processing and the asepsis of the seeds with sodium hypochlorite at 0,5% for one minute, reduced the incidence of microorganisms.