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Plant function and evolutionary biology
RESEARCH ARTICLE

Abscisic acid stimulates wound suberisation in kiwifruit (Actinidia chinensis) by regulating the production of jasmonic acid, cytokinin and auxin

Xiaobo Wei https://orcid.org/0000-0003-0101-6605 A , Xiaopeng Wei B , Weiliang Guan A C and Linchun Mao https://orcid.org/0000-0001-5015-0144 A C *
+ Author Affiliations
- Author Affiliations

A College of Biosystems Engineering and Food Science, Zhejiang Key Laboratory of Agro-Food Processing, Zhejiang R&D Center of Food Technology and Equipment, Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China.

B School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan 450002, China.

C Ningbo Research Institute, Zhejiang University, Ningbo 315100, China.

* Correspondence to: linchun@zju.edu.cn

Handling Editor: Helen Irving

Functional Plant Biology 48(11) 1100-1112 https://doi.org/10.1071/FP20360
Submitted: 18 November 2020  Accepted: 5 July 2021   Published: 23 September 2021

© 2021 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Wounding induces a cascade of correlative physiological responses that lead to the repair of damaged tissue. In this study, the effect of wounding on suberin, endogenous hormones and their metabolic genes expression was observed during the wound healing of kiwifruit (Actinidia chinensis Planch.). In addition, the role of abscisic acid (ABA) in wound suberisation was investigated by analysing the coordinated regulation between ABA and other hormones. The wound healing process in kiwifruit could be divided into two stages including: (1) initial accumulation of suberin polyphenolic (SPP) and long carbon chain suberin polyaliphatic monomers (LSPA) before 24 h; and (2) massive synthesis of SPP and very long carbon chain suberin polyaliphatic monomers (VLSPA) after 24 h. ABA content rapidly increased and induced the jasmonic acid (JA) biosynthesis at the early stage of wound healing. ABA level gradually decreased with the expression of AchCYP707A genes, while the contents of trans-zeatin (t-ZT) and indole-3-acetic acid (IAA) steadily increased at the late stage of wound healing. Exogenous ABA stimulated JA and suberin monomers accumulation, but suppressed both t-ZT and IAA biosynthesis. The role of ABA in wound healing of kiwifruit might be involved in the coordination of both JA-mediated suberin monomers biosynthesis and t-ZT- and IAA-mediated formation of suberised cells via an interaction mechanism.

Keywords: abscisic acid, Actinidia chinensis, indole-3-acetic acid, jasmonic acid, kiwifruit, suberin, trans-zeatin, wound healing.


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