Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Foliar Application of Chitosan Accelerates Wound Periderm Formation with an Intensified Deposition of Suberin Polyphenolics and Lignin at the Wound Site in Potato Tubers

Yan Zhu
* ORCID logo ,
Wei Zhang
,
Yuan Shou Zhao
,
Fu Chen
,
Fu peng Zhu
,
Ji peng Yang
,
Xiang zhen Ge
,
Wen juan Gong
,
Rui tong Cui
,
Wen jun Sheng
Version 1 : Received: 10 May 2023 / Approved: 11 May 2023 / Online: 11 May 2023 (13:35:44 CEST)

A peer-reviewed article of this Preprint also exists.

Zhu, Y.; Zhang, W.; Zhao, Y.; Chen, F.; Zhu, F.; Yang, J.; Ge, X.; Gong, W.; Cui, R.; Sheng, W. Foliar Application of Chitosan Accelerates Wound Periderm Formation with an Intensified Deposition of Suberin Polyphenolic and Lignin in the Wounds of Potato Tubers. Horticulturae 2023, 9, 663. Zhu, Y.; Zhang, W.; Zhao, Y.; Chen, F.; Zhu, F.; Yang, J.; Ge, X.; Gong, W.; Cui, R.; Sheng, W. Foliar Application of Chitosan Accelerates Wound Periderm Formation with an Intensified Deposition of Suberin Polyphenolic and Lignin in the Wounds of Potato Tubers. Horticulturae 2023, 9, 663.

Abstract

Potato tubers are susceptible to wounding during post-harvest processes, leading to quality decline, perishability and large economic losses. In this study, the potato cultivar, ‘Longshu No.7’, was foliar-sprayed with 3% chitosan (w/v) three times during the pre-harvest period after flowering to evaluate the effect of foliar spraying with chitosan on suberization processing at wounds of harvested potato tubers. Our results demonstrate that foliar-sprayed with chitosan significantly reduced wound-induced fresh weight loss and dry rot disease index by 37.34% and 41.60% on the 28 day after wounding, respectively. Foliar-sprayed with chitosan accelerated the deposition of suberin polyphenolics and lignin at the wound sites of potato tubers with the formation of thicker cell layers. This occurred with increased localized activities of key enzymes in the suberin polyphenolics and lignin pathways, including phenylalanine ammonia lyase, 4-coumaryl-coenzyme A ligase, cinnamyl alcohol dehydrogenase and peroxidase (33.90–64.32%), as well as the contents of cinnamic acid, sinapic acid, flavonoids, lignins and total phenolics (19.70–23.46%) at wound sites of potato tubers on the 7 day after wounding. Our results indicated that foliar application of chitosan accelerated wound-induced suberization of potato tubers and could mitigate post-harvest product damages.

Keywords

chitosan; foliar application; lignin; potato; suberin polyphenolics; wound-induced suberization

Subject

Biology and Life Sciences, Horticulture

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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