ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Abiotic Stress
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1575308
This article is part of the Research TopicPlant Stress Resistance: Unraveling the Mechanisms and Strategies for ResilienceView all 6 articles
Tobacco (Nicotiana tabacum) PSY peptides and their potential roles in seed germination, vegetative growth, and leaf senescence under osmotic stress
Provisionally accepted
- 1Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, Shandong Province, China
- 2Anhui Academy of Agricultural Sciences (CAAS), Hefei, Anhui Province, China
- 3Qingdao Agricultural University, Qingdao, Shandong Province, China
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Members of the PSY (Plant Peptides Containing Sulfated Tyrosine) gene family have been shown to be involved in various developmental processes and stress responses in plants. Arabidopsis PSY peptides have been shown to promote plant growth by inhibiting stress response. To understand the biological functions of PSY peptides, a comprehensive bioinformatics approach was used to identify the NtPSY genes in tobacco (Nicotiana tabacum) and to analyze their potential roles in development and stress responses. A total of nine NtPSY genes were identified, the expression changes of which under different abiotic stresses were analyzed using qRT-PCR. The results showed that all NtPSY genes responded significantly to drought, salinity, and extreme temperature stress conditions. Subsequently, potential functions of the NtPSY were explored via VIGS-silencing of homologous genes in Nicotiana benthamiana. NtPSY1 and NtPSY3 were further analyzed for their function in development and response to osmotic stress. The results indicated that treatments of tobacco detached leaves and seeds with synthetic peptides can promote seed germination and seedling growth, while reducing tobacco's tolerance to osmotic stress. The findings of this study indicate that the NtPSY peptides may act as important signaling molecules in balancing growth and stress responses in tobacco.
Keywords: PSY peptides, Tobacco, secreted peptides, Gene expression patterns, plant development, osmotic stress
Received: 12 Feb 2025; Accepted: 29 Apr 2025.
Copyright: © 2025 Deng, Pan, Wu, Yang, Liu, Li, Zhang and Guo. 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: Zhichao Deng, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, 266101, Shandong Province, China
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