correlated in external tissues (r=0.27; PB0.05).
This may be due to the fact that TSS includes
sugars, organic acids, soluble pectins, and other
constituents.
Changes in the concentrations of sucrose, glucose
and fructose were similar in external and
internal tissues, with sucrose decreasing, and glucose
and fructose increasing, over the 10-day storage
period (Fig. 7). The increases in glucose and
fructose were less obvious in the air treatment,
suggesting that more of the sugar was used in
metabolism. Forney and Breen (1986) found that
sucrose, glucose and fructose were present at similar
concentrations at the time that strawberry
fruit began to turn red, but thereafter the sucrose
concentration decreased more rapidly than either
glucose or fructose. Differences between the CA
treatments were not significant but those between
the sampling dates were. The one exception is
glucose in the external tissues where the air-stored
fruit had significantly (PB0.05) lower levels than
the other treatments.
The sugar concentrations were not correlated to
anthocyanin stability, possibly because the differences
between treatments were not large enough
to have any significant effect on water activity.