Glycoside hydrolase PpGH28BG1 modulates benzaldehyde metabolism and enhances fruit aroma and immune responses in peach (2024)

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Volume 196 Issue 2 October 2024
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Dan Jiang

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

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Qingyuan Han

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

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Yike Su

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

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Xiangmei Cao

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A&F University

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Hangzhou 311300

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China

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Boping Wu

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A&F University

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Hangzhou 311300

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China

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Chunyan Wei

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

Institute of Horticulture, Zhejiang Academy of Agricultural Sciences

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Desheng Middle Road No. 298, Hangzhou, Zhejiang Province 310021

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China

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Kunsong Chen

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

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Xian Li

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

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Bo Zhang

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University

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Zijingang Campus, Hangzhou 310058

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China

Hainan Institute of Zhejiang University

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Sanya, Hainan 572000

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China

Author for correspondence: bozhang@zju.edu.cn

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Plant Physiology, Volume 196, Issue 2, October 2024, Pages 1444–1459, https://doi.org/10.1093/plphys/kiae423

Published:

14 August 2024

Article history

Received:

22 May 2024

Accepted:

09 July 2024

Published:

14 August 2024

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    Dan Jiang, Qingyuan Han, Yike Su, Xiangmei Cao, Boping Wu, Chunyan Wei, Kunsong Chen, Xian Li, Bo Zhang, Glycoside hydrolase PpGH28BG1 modulates benzaldehyde metabolism and enhances fruit aroma and immune responses in peach, Plant Physiology, Volume 196, Issue 2, October 2024, Pages 1444–1459, https://doi.org/10.1093/plphys/kiae423

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Abstract

Benzaldehyde (BAld) is one of the most widely distributed volatiles that contributes to flavor and defense in plants. Plants regulate BAld levels through various pathways, including biosynthesis from trans-cinnamic acid (free BAld), release from hydrolysis of glycoside precursors (BAld-H) via multiple enzymatic action steps, and conversion into downstream chemicals. Here, we show that BAld-H content in peach (Prunus persica) fruit is up to 100-fold higher than that of free BAld. By integrating transcriptome, metabolomic, and biochemical approaches, we identified glycoside hydrolase PpGH28BG1 as being involved in the production of BAld-H through the hydrolysis of glycoside precursors. Overexpressing and silencing of PpGH28BG1 significantly altered BAld-H content in peach fruit. Transgenic tomatoes heterologously expressing PpGH28BG1 exhibited a decrease in BAld-H content and an increase in SA accumulation, while maintaining fruit weight, pigmentation, and ethylene production. These transgenic tomato fruits displayed enhanced immunity against Botrytis cinerea compared to wild type (WT). Induced expression of PpGH28BG1 and increased SA content were also observed in peach fruit when exposed to Monilinia fructicola infection. Additionally, elevated expression of PpGH28BG1 promoted fruit softening in transgenic tomatoes, resulting in a significantly increased emission of BAld compared to WT. Most untrained taste panelists preferred the transgenic tomatoes over WT fruit. Our study suggests that it is feasible to enhance aroma and immunity in fruit through metabolic engineering of PpGH28BG1 without causing visible changes in the fruit ripening process.

© The Author(s) 2024. Published by Oxford University Press on behalf of American Society of Plant Biologists. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.

This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/pages/standard-publication-reuse-rights)

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Research article > Metabolism

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