3.5. Effect ofcutting styles on the contents ofO2 and H2O2 in fresh-cut
pitaya fruit
In whole pitaya fruit, O2 production rate increased very slowly
with the storage duration. However, fresh-cut processing caused a
rapid increase of O2 production. The rate of O2 production
reached their maximum at the second day and decreased then
(Fig. 5A). Quarter-slice showed slightly lower O2 production rate
than slice and half-slice at the early stage of the storage. H2O2
content of whole pitaya fruit increased slightly during the whole
storage, whereas a sharp increase at the first day and a following
reduction was observed for all fresh-cut pitaya tissues (Fig. 5B). The
quarter-slice showed the highest H2O2 level, followed by half-slice
and slice (p < 0.05)