3.2. Changes of flesh firmness, Hue angel and ethylene production
Flesh firmness maintained at high level during chilling storage
while the difference between H2S treatment group and the control
was not noticeable. During ripening stage, firmness decreased
significantly while H2S treatment delayed the decrease. However,
H2S treatment did not work effectively on fruits without chilling
stress (Fig. 2A). H2S treatment postponed the decrease of Hue angel
with chilling stress, especially on the stage of ripening, while it had
little effect on the fruit without chilling stress (Fig. 2B). For ethylene
production, low level of ethylene production was observed
in chilling storage and it increased rapidly during ripening stage.
H2S treatment had little effect on banana fruit during chilling storage;
whereas it had significant influence during ripening stage
whether the fruit suffered chilling stress (Fig. 2C).