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Front. Plant Sci.
Sec. Plant Physiology
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1291693
This article is part of the Research Topic Physiological and Molecular Mechanisms of Woody Plants Under Abiotic and Biotic Stresses View all 8 articles

PpSAUR5 Promotes Plant Growth by Regulating Lignin and Hormone Pathways

Provisionally accepted
Xin-miao Li Xin-miao Li 1Han-han Zhai Han-han Zhai 2Xiu-hong An Xiu-hong An 1He Zhang He Zhang 1Xue-ying Zhang Xue-ying Zhang 1Peng-fei Wang Peng-fei Wang 1Hai-jiang Chen Hai-jiang Chen 1Yi Tian Yi Tian 1*
  • 1 Hebei Agricultural University, Baoding, Hebei, China
  • 2 Kashgar Vocational and Technical College, Kashi, China

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

    Peach (Prunus persica) has a high nutritional and economic value. However, its overgrowth can lead to yield loss. Regulating the growth of peach trees is challenging. The small auxin-up RNA (SAUR) gene family is the largest family of auxin-responsive genes, which play important roles in plant growth and development. However, members of this gene family are rarely reported in peach. In this study, we investigated the role of PpSAUR5, a SAUR family member, in the growth and development of peach plants. PpSAUR5 responds to auxin and gibberellin, promoting and inhibiting the synthesis of gibberellin and auxin, respectively. The heterologous transformation of PpSAUR5 in Arabidopsis led to enhanced growth of leaves and siliques, lightening of leaf color, decrease in chlorophyll content, increase in lignin content, abnormalities in the floral organs, and distortion of the inflorescence axis. Transcriptome data analysis of PpSAUR5 overexpression and wild-type lines revealed 854 differentially expressed genes (DEGs). GO and KEGG analyses showed that the DEGs were primarily involved in biological processes, such as cellular processes, metabolic processes, response to stimuli, and catalytic activity. These genes were mainly enriched in pathways, such as phenylalanine biosynthesis, phytohormone signaling, MAPK signaling, and so on. In summary, these results suggested that PpSAUR5 might regulate tree vigor by modulating the synthesis of auxin and gibberellin. Future studies can use PpSAUR5 as a candidate gene to elucidate the potential regulatory mechanisms underlying peach tree vigor.

    Keywords: SAUR, peach, phytohormone, Tree vigor, Transcriptome

    Received: 10 Sep 2023; Accepted: 08 May 2024.

    Copyright: © 2024 Li, Zhai, An, Zhang, Zhang, Wang, Chen and Tian. 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: Yi Tian, Hebei Agricultural University, Baoding, 071001, Hebei, 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.