CIDCA   05380
CENTRO DE INVESTIGACION Y DESARROLLO EN CRIOTECNOLOGIA DE ALIMENTOS
Unidad Ejecutora - UE
artículos
Título:
Effect of time of day for harvest and postharvest treatments on the sugar metabolism of broccoli(Brassica oleracea var Italica)
Autor/es:
J.H. HASPERUÉ, M.L. LEMOINE, A.R. CHAVES, AND G.A. MARTÍNEZ
Revista:
AGRICULTURAL AND FOOD SCIENCE
Editorial:
AGRICULTURAL RESEARCH CENTRE FINLAND
Referencias:
Lugar: Helsinki; Año: 2014 vol. 23 p. 48 - 59
ISSN:
1459-6067
Resumen:
Loss of sugars contributes to accelerate postharvest senescence of
broccoli. Several treatments have been developed to delay senescence, but in
many cases their effects on sugar metabolism were not analyzed. We studied the
effect of harvest at different times of day (08:00, 13:00 and 18:00 h) and of
several postharvest treatments (heat treatment -HT-, modified atmosphere -MA-
and 1-methylcylcopropene -1-MCP-) on sugar levels and activities of enzymes
related to sucrose and starch degradation. Harvesting at the end of day delayed
the loss of chlorophylls and caused the lowest decrement in sugars, although no
differences in invertase, sucrose synthase and β-amylase activities were
detected among samples. Treatments of MA and 1-MCPcaused a lower loss of
glucose and fructose, while HT caused a lower decrement of sucrose. The samples
treatedmaintained higher levels of chlorophylls. The treatments reduced the
activity of invertase and sucrose synthase and induced higher levels of
β-amylase activity. Harvesting at the end of day and performing simultaneously
a MA treatment could be a good combination to maintain the green color of the
inflorescence and sugar levels during postharvest of broccoli.