MDA content and LOX activity are often used as measurements
of loss of membrane integrity of fruits in response to stress during
postharvest storage (Yang et al., 2009; Ma et al., 2014). As shown in
Fig. 5A, MDA content in control fruit gradually increased during
storage and reached the maximum value of 1.67 mmol kg1 of fresh
weight on day 9, and then decreased to 1.24 mmol kg1 of fresh
weight on day 12, with the values in AITC-treated fruit consistently
lower than that of the control. At the end of 15-day storage, the
MDA levels of fruit treated with AITC at 5 and 15 mL L1 were 63.7%
and 65.3%, respectively, lower than that of the control fruit.
Ma et al. (2014) suggested low temperature storage could
induce LOX activity in kiwifruit. Similarly, LOX activity in the
mulberry fruit stored at 5 C (control) increased slowly and reached
a peak value of 8150 U kg1 of fresh weight on day 6, followed by a
decline to 6840 U kg1 of fresh weight on day 15 (Fig. 5B). LOX
activity in AITC-treated fruit decreased gradually during the
storage and at the end of storage was 15.3% and 17.0% lower in fruit
treated with AITC at 5 and 15 mL L1 than that in the control,
respectively. The results in this work exhibited that AITC treatment
could inhibit the accumulation of MDA and decrease LOX activity of
mulberry fruit