“…Our laboratory found that trypsin has a good fresh‐keeping effect on H. undatus . It can regulate the level of endogenous reactive oxygen species (ROS) in H. undatus peels (Li et al, 2019, 2020; Pang et al, 2020) and inhibit the level of saturated fatty acids (Li et al, 2022; Pang et al, 2022), induce the stoma closure (Li, Li, et al, 2021), and the biosynthesis of related substances in phenylpropanoid pathways such as lignin, chlorogenic acid (Li, Zhang, et al, 2021), and flavonoids (Pang et al, 2021). It can also affect the free radical scavenging activity of flavonoids, such as DPPH and ABTS (Li et al, 2014, 2018).…”