Activity of β-Galactosidase and Polygalacturonase in Zucchini Squash Cucurbita pepo L. Stored at Low TemperaturesReportar como inadecuado




Activity of β-Galactosidase and Polygalacturonase in Zucchini Squash Cucurbita pepo L. Stored at Low Temperatures - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Food Technology and Biotechnology, Vol.45 No.4 December 2007. -

When fruits are exposed to chilling temperatures, enzymatic systems are affected and normal cell metabolism is altered; cell wall enzymes are the least studied in this respect. Our objective is to determine the effect of storage temperature and-or kind of tissue on the activity of the enzymes polygalacturonase PG and β-galactosidase β-gal in zucchini squash Cucurbita pepo L. subjected to 2.5 and-or 12 °C for 16 days. Exocarp and endocarp samples were analyzed every 4 days for PG and β-gal activities. The highest β-gal activity was found in the exocarp at 12 °C; in both tissues β-gal decreased with time at 2.5 °C, but increased at 12 °C. PG activity was higher in the endocarp highest activity at 2.5 °C than in the exocarp highest activity at 12 °C. It was concluded that PG activity in the exocarp constitutes an adequate system for studying the relationship between chilling injury and cell wall biological activity.

chilling injury; cold signaling; oligosaccharins; cell wall



Autor: René Renato Balandrán-Quintana - ; Universidad Autónoma de Chihuahua, Facultad de Ciencias Químicas, Ciudad Universitaria s-n

Fuente: http://hrcak.srce.hr/



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