%0 Journal Article %A Lei WEI %A Kaimeng LIU %A Zhongfu DONG %A Jingyi XU %A Yijiao WU %A Chunyu XIONG %A Jie SUN %A Caixia WANG %T Effect of Humidity on Wound Healing of Sweet Potato %D 2021 %R 10.11869/j.issn.100-8551.2021.09.2111 %J Journal of Nuclear Agricultural Sciences %P 2111-2117 %V 35 %N 9 %X

The Pushu32 sweet potato was used as material to explore the effect of postharvest humidity on the wound healing of sweet potato. After an artificially mechanical damage, the sweet potato was stored at 25℃ under different humidity(RH50% and RH80%). The lignin accumulation, weight loss rate, respiratory intensity, key enzyme activity, total phenol and flavonoid content during the healing process of the sweet potato were measured to evaluate the effect of humidity on the wound healing of sweet potato. The results showed that RH80% enhanced the formation of healing tissues for mechanical damaged sweet potato than RH50%; lignin accumulation peaked after 4d of healing. Compared with RH50%, RH80% treatment could significantly increase the activity of phenylalanine ammonialyase(PAL), peroxidase(POD) and polyphenol oxidase(PPO)(P<0.05), elevate the content of total phenols and flavonoids, bring-forwards the respiration peak and reduce the weight loss of the sweet potato. The correlation analysis revealed a significant correlation between lignin content with PAL, POD, PPO activity, total phenol and flavonoid content under RH80% healing treatment(P<0.05). This study provides the theoretical support to the wound healing of postharvest sweet potato.

%U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2021.09.2111