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Mini Review|31 Jul 2024|OPEN
Auxin response factors: important keys for understanding regulatory mechanisms of fleshy fruit development and ripening 
Bai-Jun Li1,2,3 , , Ruo-Xuan Bao1 and Yan-Na Shi2,3,4 , Donald Grierson2,5 , , Kun-Song Chen,2,3,4
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, Guangxi University, No.100, East Daxue Road, Xixiangtang District, Nanning, Guangxi 530004, China
2State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, No. 866, Yuhangtang Road, Xihu District, Hangzhou, 310058, China
3Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, Zhejiang University, Zijingang Campus, No. 866, Yuhangtang Road, Xihu District, Hangzhou 310058, China
4College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, No. 866, Yuhangtang Road, Xihu District, Hangzhou 310058, China
5Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
*Corresponding author. E-mail: baijunlicn@gxu.edu.cn,donald.grierson@nottingham.ac.uk

Horticulture Research 11,
Article number: uhae209 (2024)
doi: https://doi.org/10.1093/hr/uhae209
Views: 1362

Received: 08 Feb 2024
Accepted: 18 Jul 2024
Published online: 31 Jul 2024

Abstract

Auxin response transcription factors (ARFs) form a large gene family, many of whose members operate at the final step of the auxin signaling pathway. ARFs participate directly in many aspects of plant growth and development. Here we summarize recent advances in understanding the roles of ARFs in regulating aspects of fleshy fruit development and ripening. ARFs play a crucial role in regulating fruit size, color, nutrients, texture, yield, and other properties that ultimately influence the ripening and quality of important crops such as tomato, apple, strawberry, and peach. ARFs impact these processes acting as positive, negative, or bidirectional regulators via phytohormone-dependent or -independent mechanisms. In the phytohormone-dependent pathway, ARFs act as a central hub linking interactions with multiple phytohormones generating diverse effects. The three domains within ARFs, namely the DNA-binding domain, the middle region, and the carboxy-terminal dimerization domain, exhibit distinct yet overlapping functions, contributing to a range of mechanisms mediated by ARFs. These findings not only provide a profound understanding of ARF functions, but also raise new questions. Further exploration can lead to a more comprehensive understanding of the regulatory mechanisms of fleshy fruit development and ripening mediated by ARFs.