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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Biotechnology
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1492384

PbMYB5 transcription factor plays a role in regulating anthocyanin biosynthesis in pear (Pyrus bretschneideri Rehd) skin

Provisionally accepted

The final, formatted version of the article will be published soon.

    The phenylacetone pathway, which encompasses flavonoids, lignin, and other compounds, is of paramount importance in determining the quality of pear fruit. Nevertheless, the precise regulatory functions of R2R3-MYB transcription factors in the metabolic pathways that regulate pear color changes remain unclear. In this study, we isolated an R2R3-PbMYB5(PbMYB5) transcription factor from 'Red Zaosu' pears and demonstrated that it influenced the expression of several genes, including PbCAD1, PbF5H, PbLAR, PbANR, and PbUFGT. The overexpression of PbMYB5 resulted in a notable elevation in anthocyanin concentration within the pear epidermis. Further research has shown that PbMYB5 is able to bind to PbANS and also has interactions with PbbHLH3 and PbbHLH33.We proposed that PbMYB5 forms a complex with PbbHLH3, PbbHLH33, and PbWD40 to activate PbANS and promote anthocyanin accumulation. This study offers new insights into the regulation of various metabolic pathways that impact fruit coloration.

    Keywords: MYB transcription factor, Lignin, Anthocyanin, proanthocyanidins(PAs), coloration

    Received: 06 Sep 2024; Accepted: 10 Dec 2024.

    Copyright: © 2024 Li, Yang, Zhou, Zhou, Lei, He, Zhang, Zhang, Lin, Wang, Li, He, Chen, Luo, Wang, Tang and Yong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Haoru Tang, Sichuan Agricultural University, Ya'an, China
    Zhang Yong, Sichuan Agricultural University, Ya'an, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.