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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Breeding
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1495161

BvBZR1 improves parenchyma cell development and sucrose accumulation in sugar beet (Beta vulgaris L.) taproot

Provisionally accepted
Ningning Li Ningning Li Wei Wang Wei Wang Xiaotong Guo Xiaotong Guo Yaqing Sun Yaqing Sun Guolong Li Guolong Li Shaoying Zhang Shaoying Zhang *
  • Inner Mongolia Agricultural University, Hohhot, China

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

    signal transduction, play an important role in regulating plant growth and development. However, little is known about the molecular regulatory mechanism of BZR in sugar beet taproot growth. In this study, BvBZR1 expression was significantly induced by exogenous BR treatment. Transgenic sugar beet overexpressing BvBZR1 exhibited a higher taproot diameter compared with the wild type, mainly due to a significant enhancement in the spacing between cambial rings by increasing the size and layers of parenchyma cells. BvBZR1 regulated the expression of BvCESA6, BvXTH33, BvFAD3, and BvCEL1 and enhanced cell wall metabolism to promote sugar beet taproot growth in parenchyma cells and the development of each cambium ring. In addition, BvBZR1 overexpression significantly increased the accumulation of sucrose and soluble sugars in the taproot, which was attributed to its ability to regulate the expression of BvSPS and BvINV and improve the activity of BvSPS, BvSS-S, BvSS-C, and BvINV enzymes in each cambium ring and parenchyma cell in the sugar beet taproot.These results suggest that BvBZR1 can regulate the expression of genes related to cell wall and sucrose metabolism, improve corresponding enzyme activity, and promote the development of each cambium ring and parenchyma cell, thereby promoting the growth and development of sugar beet taproots.

    Keywords: BvBZR1, taproot development, Transgenic sugar beet, parenchyma cells, Sucrose accumulation

    Received: 12 Sep 2024; Accepted: 14 Jan 2025.

    Copyright: © 2025 Li, Wang, Guo, Sun, Li and Zhang. 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: Shaoying Zhang, Inner Mongolia Agricultural University, Hohhot, 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.