Terpinen-4-ol Enhances Disease Resistance of Postharvest Strawberry Fruit More Effectively than Tea Tree Oil by Activating the Phenylpropanoid Metabolism Pathway

This study aimed to reveal the effects and possible mechanism of terpinen-4-ol, the main component of tea tree oil (TTO), on the disease resistance of strawberry fruit. When the effects of TTO and its components were compared on the decay development in fruit inoculated with after treatment, strawbe...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2020-06, Vol.68 (24), p.6739-6747
Main Authors: Li, Zhenbiao, Wang, Nan, Wei, Yingying, Zou, Xiurong, Jiang, Shu, Xu, Feng, Wang, Hongfei, Shao, Xingfeng
Format: Article
Language:English
Subjects:
Antifungal Agents - pharmacology
Botrytis - drug effects
Botrytis - growth & development
Disease Resistance
Fragaria - immunology
Fragaria - microbiology
Fruit - immunology
Fruit - microbiology
Microbial Sensitivity Tests
Phenylpropionates - immunology
Plant Diseases - immunology
Plant Diseases - microbiology
Tea Tree Oil - pharmacology
Terpenes - pharmacology
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Summary:This study aimed to reveal the effects and possible mechanism of terpinen-4-ol, the main component of tea tree oil (TTO), on the disease resistance of strawberry fruit. When the effects of TTO and its components were compared on the decay development in fruit inoculated with after treatment, strawberry treated with terpinen-4-ol showed the lowest disease incidence (44.4%) after 48 h and also the smallest lesion diameter during the whole storage. This indicates that terpinen-4-ol induces the highest disease resistance in strawberry compared with TTO and other components. Untargeted metabolomic analysis showed that terpinen-4-ol treatment strongly activated phenylpropanoid biosynthesis and flavonoid metabolism pathway by increasing the accumulation of cinnamaldehyde, coniferyl aldehyde, naringenin, taxifolin, quercetin, and quercitrin in fruit at 12 h after treatment. In addition, terpinen-4-ol treatment also caused the accumulation of total phenolics and lignin by enhancing activities and relative gene expression of key enzymes in the phenylpropanoid metabolism pathway. These results suggest that terpinen-4-ol, as the key component of TTO, is the most important contributor to the effectiveness of TTO in improving disease resistance of strawberry fruit through activating the phenylpropanoid metabolism pathway.
ISSN:0021-8561
1520-5118
DOI:10.1021/acs.jafc.0c01840