Qualidade e bioquímica de parede celular de sapoti [Manilkara sapota (L.) Von Royen] submetido ao 1-metilciclopropeno

Abstract

The brazilian market of exotic fruits has shown good perspectives lately. However, many species, although their high market potential, are still low commercialized. Among those species, sapodilla is highly acceptable by the market consumer, because your appreciable taste. The brazilian sapodilla orchards are still deprived of postharvest technologies, so there are many damages on that stage. With aim to generate technology for quality maintenance and to elongate the postharvest lifetime of sapodilla, the purpose oh this work was to evaluate the effect of 1-metilciclopropeno (1-MCP), as a blocker of ethylene action, on many attributes of fruit quality. The fruits, origined from Jaguaruana, Ceará state, Brazil, were treated with 1-MCP (0, 100, 200, 300 e 400nLX*1), for 12hours, storaged under modified atmosphere, temperature 25 è 2°C* relative humidity 70á 5 % during 23 days, The fruits under treatments had more six days of postharvest lifetime and the best 1-MCP doses were between 200 and 400 nL-L"1. The treatment with300 nL.L"1 retarded the loss of fruit firmnesses, due to its inhibitory action on the pectinmethylesterase, polygalacturonase and p-galactosidase enzymes activity, resulting in less pectin solubilization and less cellulose, hemicellulose, polyuronideos and neutral sugars degradation.