3.3. Changes of ATP, ADP and AMP contents and energy charge
ATP content decreased gradually in chilling storage. As H2S
treatment inhibited the decrease of ATP content, H2S treatment
group maintained higher ATP content than the control during
ripening stage (Fig. 3A). ADP content increased during both chilling
storage and ripening stage. H2S treatment increased ADP content
during chilling storage and ripening stage after chilling stress but
it did not affect the fruits without chilling stress (Fig. 3B). On the
contrary, H2S treatment inhibited an increase of AMP in fruits with
chilling stress. After 14-day-chilling stress, 15.03% and 12.66%
lower AMP was observed in H2S treatment group on day 4 and 6
respectively compared with control group (Fig. 3C). According to
the ATP, ADP and AMP content, energy charge decreased gradually
during storage. H2S treatment retarded the loss of energy in both
chilling storage and ripening stage (Fig. 3D).