Pre and postharvest GABA treatment also enhanced endogenous
GB accumulation in the flowers during storage (Table 3). Endogenous
GB exerts not only as osmoregulation but can function as a
membrane stabilizer under oxidative stress. In addition, GB triggers
ROS scavenging gene expression leading to lower ROS accumulation
(Kurepin et al., 2015). Lower chilling injury in anthurium cut
flowers treated with pre and postharvest GABA can be attributed to
higher endogenous GB accumulation, which maintains membrane
integrity (Aghdam et al., 2015, 2016). Shan et al. (2016) reported
that the GB treatment ameliorated chilling injury in peach fruits by
promoting endogenous GB accumulation results from higher
betaine aldehyde dehydrogenase (BADH) enzyme activity coincided
with higher endogenous ATP content, leading to higher
membrane integrity. Nayyar et al. (2014) reported that the GABA
treatment improved heat tolerance in rice seedlings by enhancing
leaf turgor due to accumulation of osmolytes proline and trehalose
which led to maintaining leaf RWC. Pre and postharvest GABA