Gibberellin delays metabolic shift during tomato ripening by inducing auxin signaling

Fruit ripening involves the dynamic interaction of phytohormones. Ethylene (ET) and gibberellin (GA) antagonistically affect fruit ripening. However, the mechanism of GA and its potential interaction with ET during fruit ripening remain unknown. To identify the potential molecular mechanism of ET an...

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Published inFrontiers in plant science Vol. 13; p. 1045761
Main Authors Park, Me-Hea, Malka, Siva Kumar
Format Journal Article
LanguageEnglish
Published Frontiers Media S.A 14.11.2022
Subjects
auxin signaling
ethylene
gibberellin
hormone interaction
metabolic shift
Plant Science
ripening
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Summary:Fruit ripening involves the dynamic interaction of phytohormones. Ethylene (ET) and gibberellin (GA) antagonistically affect fruit ripening. However, the mechanism of GA and its potential interaction with ET during fruit ripening remain unknown. To identify the potential molecular mechanism of ET and GA interplay in tomato ( Solanum lycopersicum L.) fruit ripening, transcriptome and metabolomic profiling was carried out in tomato fruit treated with GA, ET or the combination of the two hormones (GA+ET). ET accelerated fruit ripening with the simultaneous repression of auxin signaling. In contrast, gibberellin delayed ripening by the upregulation of auxin signaling. ET signaling and response was inhibited by GA or combined with ET. At the metabolite level, while GA treatment inhibited metabolite shift during ripening, ET treatment promoted. In the combined hormone treatment, ET reduced or recovered GA inhibitory effect on specific metabolites. This study provided insight into ET and GA interaction, highlighting the importance of auxin signaling in metabolic shifts during tomato ripening progression.
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This article was submitted to Crop and Product Physiology, a section of the journal Frontiers in Plant Science
Edited by: Yudong Liu, Zhengzhou University, China
Reviewed by: Sheikh Mansoor, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, India; Koh Aoki, Osaka Prefecture University, Japan
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2022.1045761