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The objective of this study was to evaluate the microbiological, physiological and qualitative changes in fresh cut yam (Dioscorea alata) stored at different temperatures. The experimental design was completely randomized in factorial scheme 4x4, with four storage temperatures (5, 10, 15 and 20ºC) and four evaluation periods (0, 3, 6 and 9 days after processing) with four replications. The microbiological analyzes were performed at 0, 3 and 9 days after processing. Fresh cut yam stored at 5ºC kept respiration rate, ethylene production at low levels similar to those found in yam not processed and stored at 20ºC. The weight loss, lightness and psicotrophic bacteria counting in fresh cut yam stored at 5ºC were kept within the trading patterns until the third day.

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ResumoOs cogumelos comestíveis são muito apreciados pelo sabor e qualidades nutricionais. Resíduos lignocelulósicos da agroindústria são excelentes substratos tanto para sua produção como para propagação do micélio (inóculo ou semente). O objetivo deste trabalho foi avaliar três resíduos oriundos do processamento de alimentos, palha de arroz (PA), sabugo de milho (SM) e casca de amendoim (CA) para produção de inóculo de Pleurotus pulmonarius CCB19. As sementes foram posteriormente inoculadas em sacos contendo 150 g de uma mistura de farelo de trigo:palha de milho:casca de amendoim na proporção 5:2:3. Os corpos de frutificação foram colhidos e a eficiência biológica (EB), produtividade e tamanho foram calculados. A semente proveniente de PA foi mais eficiente na colonização, com média de 43% de EB e com os maiores píleos. No entanto, o menor tempo para frutificação ocorreu nos cultivos semeados com sementes de SM. As médias de EB foram de 28 e 23% em SM e CA, respectivamente, demonstrando a viabilidade do processo. Palavras-chave: semente; basidiomicetos; proteína alimentar; basidiocarpo. AbstractEdible mushrooms are appreciated for their taste and nutritional qualities. Lignocellulosic wastes are excellent substrates for their production and mycelium propagation (inoculum or spawn). The aim of this work was to evaluate three agricultural residues: rice straw, corncob and peanut husk to produce Pleurotus pulmonarius CCB19 spawn. The spawns were inoculated in bags containing 150 g of a mixture of wheat bran: corn husk:peanut husk (5:2:3). The fruit bodies were harvested from the substrate and biological efficiencies, yield and size were calculated. The rice straw spawn produced the highest body fruit, showing a biological efficiency of 43%. However, the least time for fructification was with corncob powder spawn. Larger mushrooms were obtained when rice straw was used as spawn. The means of the EB were 28 and 23% in corn cob and peanut husk, respectively.