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Grapevine ERF transcription factor VvERF113 enhances waterlogging tolerance in plants via interaction with the HD-Zip
Zhuo Min1, Jie Liu2, Liang Zhao1
1College of Brewing Engineering, Moutai Institute, Renhuai, 564500, China.
Abstract:
Waterlogging is a major abiotic stress that severely limits grapevine productivity by inducing hypoxia and oxidative stress in the root tissues. Transcription factors, such as APETALA2/Ethylene-Responsive Factor (AP2/ERF) are closely involved in regulating plant survival under waterlogging stress. Here, we characterized VvERF113, a root-enriched AP2/ERF transcription factor from Vitis vinifera, and investigated its role in regulating plant waterlogging tolerance. VvERF113 overexpression in Arabidopsis thaliana significantly alleviated leaf wilting and oxidative damage under waterlogged conditions, accompanied by increased antioxidant enzyme activity and reduced hydrogen peroxide accumulation. Molecular analyses revealed that VvERF113 enhanced the expression of hypoxia-responsive genes (AtADH1 and AtPDC1), ethylene-related HD-Zip transcription factors (AtHB1 and AtHB2), and oxygen-sensing genes (AtPCO1 and AtPCO2), indicating its involvement in multiple regulatory pathways. VvERF113 physically interacts with VvATHB-13, forming a transcriptional module that integrates AP2/ERF and HD-Zip I signaling. This interaction was validated using yeast two-hybrid, bimolecular fluorescence complementation, and glutathione S-Transferase pull-down assays. This study identified a novel ERF-HD-ZIP regulatory node that coordinates fermentative metabolism, ethylene signaling, and redox balance under hypoxic stress. Conclusively, VvERF113 presents a promising candidate for breeding waterlogging-tolerant grapevine cultivars.
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