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Article

Brassinosteroid Accelerates Wound Healing of Potato Tubers by Activation of Reactive Oxygen Metabolism and Phenylpropanoid Metabolism

1
College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
2
Department of Postharvest Science of Fresh Produce, Agricultural Research Organization, Rishon LeZion 7505101, Israel
*
Author to whom correspondence should be addressed.
Academic Editors: Ângela Fernandes and Eliana Pereira
Foods 2022, 11(7), 906; https://doi.org/10.3390/foods11070906
Received: 13 February 2022 / Revised: 15 March 2022 / Accepted: 19 March 2022 / Published: 22 March 2022
(This article belongs to the Topic Food Processing and Preservation)
Wound healing could effectively reduce the decay rate of potato tubers after harvest, but it took a long time to form typical and complete healing structures. Brassinosteroid (BR), as a sterol hormone, is important for enhancing plant resistance to abiotic and biotic stresses. However, it has not been reported that if BR affects wound healing of potato tubers. In the present study, we observed that BR played a positive role in the accumulation of lignin and suberin polyphenolic (SPP) at the wounds, and effectively reduced the weight loss and disease index of potato tubers (cv. Atlantic) during healing. At the end of healing, the weight loss and disease index of BR group was 30.8% and 23.1% lower than the control, respectively. Furthermore, BR activated the expression of StPAL, St4CL, StCAD genes and related enzyme activities in phenylpropanoid metabolism, and promoted the synthesis of lignin precursors and phenolic acids at the wound site, mainly by inducing the synthesis of caffeic acid, sinapic acid and cinnamyl alcohol. Meanwhile, the expression of StNOX was induced and the production of O2− and H2O2 was promoted, which mediated oxidative crosslinking of above phenolic acids and lignin precursors to form SPP and lignin. In addition, the expression level of StPOD was partially increased. In contrast, the inhibitor brassinazole inhibited phenylpropanoid metabolism and reactive oxygen metabolism, and demonstrated the function of BR hormone in healing in reverse. Taken together, the activation of reactive oxygen metabolism and phenylpropanoid metabolism by BR could accelerate the wound healing of potato tubers. View Full-Text
Keywords: wound healing; potato tubers; phenylpropanoid metabolism; ROS; brassinosteroid; abiotic stress wound healing; potato tubers; phenylpropanoid metabolism; ROS; brassinosteroid; abiotic stress
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MDPI and ACS Style

Han, Y.; Yang, R.; Zhang, X.; Wang, Q.; Wang, B.; Zheng, X.; Li, Y.; Prusky, D.; Bi, Y. Brassinosteroid Accelerates Wound Healing of Potato Tubers by Activation of Reactive Oxygen Metabolism and Phenylpropanoid Metabolism. Foods 2022, 11, 906. https://doi.org/10.3390/foods11070906

AMA Style

Han Y, Yang R, Zhang X, Wang Q, Wang B, Zheng X, Li Y, Prusky D, Bi Y. Brassinosteroid Accelerates Wound Healing of Potato Tubers by Activation of Reactive Oxygen Metabolism and Phenylpropanoid Metabolism. Foods. 2022; 11(7):906. https://doi.org/10.3390/foods11070906

Chicago/Turabian Style

Han, Ye, Ruirui Yang, Xuejiao Zhang, Qihui Wang, Bin Wang, Xiaoyuan Zheng, Yongcai Li, Dov Prusky, and Yang Bi. 2022. "Brassinosteroid Accelerates Wound Healing of Potato Tubers by Activation of Reactive Oxygen Metabolism and Phenylpropanoid Metabolism" Foods 11, no. 7: 906. https://doi.org/10.3390/foods11070906

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