ERF Transcription Factors and Their Research Advancement in Peanut

doi:10.11924/j.issn.1000-6850.casb2025-0556

Abstract

Abstract:

Ethylene Responsive Factor (ERF) transcription factors belong to the plant AP2/ERF transcription factor superfamily and are key regulatory factors in plants responses to biotic and abiotic stresses. They bind to the cis-acting element GCC-box through the conserved AP2/ERF domain, thereby regulating the spatiotemporal expression of target genes. This article reviews the structural characteristics, classification system, distribution patterns, and biological functions of plant ERF transcription factors. Structurally, they contain functional regions such as the DNA-binding domain and transcriptional regulatory domain, among which the amino acids at positions 14 and 19 of the AP2/ERF domain are key markers for classification. In terms of classification, both the ERF and DREB subfamilies can be further divided into 6 subgroups. In terms of distribution, the number of members of this family varies significantly among different plants, and the number of ERF subfamily members in dicotyledonous plants is usually more than that in monocotyledonous plants. The functional mechanism of ERF in biotic stress response is emphatically elaborated as follows. On the one hand, it enhances plant resistance to pathogens by activating disease-resistant genes such as PR and PDF1.2; on the other hand, ERFs containing the EAR motif can act as negative regulators to inhibit the expression of target genes. At the same time, this article summarizes the research status of peanut ERF, including family identification (our research group identified 76 ERF family members in cultivated peanuts in 2022), verification of stress resistance functions (such as AhERF008 and AhERF019 can enhance abiotic stress tolerance), and current limitations (such as insufficient systematic analysis and unclear regulatory mechanisms). Finally, the future research directions are prospected, proposing that multi-omics and gene editing technologies should be combined to analyze the ERF-mediated stress resistance network, so as to provide a theoretical basis and technical targets for peanut stress resistance molecular breeding and facilitate research on peanut stress resistance engineering.

Key words: ERF, transcription factor, peanut, biotic stress, biological function, targeted genes

CUI Mengjie, CHEN Linjie, HUANG Bingyan, DONG Wenzhao, HAN Suoyi, ZHANG Xinyou. ERF Transcription Factors and Their Research Advancement in Peanut[J]. Chinese Agricultural Science Bulletin, 2025, 41(21): 43-50.

Figures/Tables 2

References 79

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