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Integration of metabolic and transcriptomic analyses for revealing the galactose metabolism of tobacco (Nicotiana tabacum) under salt stress

文献类型： 外文期刊

作者： Bai, Ge 1 ; Zhang, Hui 2 ; Li, Yong 1 ; Yang, Da-Hai 1 ; Fei, Mingliang 1 ; Pang, Tao 1 ; Fu, Yaning 2 ; Yang, Ai-Guo 4 ; Wang, Zhen-Yu 5 ; Gu, Jinbao 5 ; Xie, He 1 ;

作者机构： 1.Yunnan Acad Tobacco Agr Sci, Natl Tobacco Genet Engn Res Ctr, Tobacco Breeding & Biotechnol Res Ctr, Key Lab Tobacco Biotechnol Breeding, Kunming, Yunnan, Peoples R China

2.Beijing Life Sci Acad, Applicat Dept 1, Beijing, Peoples R China

3.Zhengzhou Tobacco Res Inst, Natl Tobacco Gene Res Ctr, Zhengzhou, Henan, Peoples R China

4.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao, Shandong, Peoples R China

5.Guangdong Acad Sci, Inst Nanfan & Seed Ind, Guangzhou, Guangdong, Peoples R China

关键词： salt stress; metabolomics; transcriptomics; tobacco plants; molecular mechanisms; salt tolerance

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）

ISSN： 1664-462X

年卷期： 2025 年 16 卷

页码：

收录情况： SCI

摘要： Background Soil salinization poses a global threat to agriculture, necessitating strategies to enhance plant salt stress tolerance. Understanding the metabolic and transcriptomic responses of tobacco plants to salt stress is crucial for developing such strategies.Results This study identified 238 up-regulated and 122 down-regulated metabolites in tobacco plants under long-term salt stress. Initial stress stages activated galactose and sucrose metabolic pathways. Chlorophyll synthesis was impacted by decreased 5-aminolevulinic acid production, while proline accumulation helped mitigate cell damage. Metabolite-metabolite correlation analysis revealed significant correlations among metabolites, and enrichment analysis highlighted benzamides, amino acids, fatty acids, and monosaccharides. Transcriptome analysis identified 8,386 differentially expressed genes, with enriched pathways in hormone signaling, photosynthesis, and amino acid metabolism. Integrated analysis confirmed the involvement of sucrose pathway in the salt response, validated by qRT-PCR.Conclusions This study provides a comprehensive understanding of the regulatory networks in tobacco during salt stress. The findings lay the groundwork for future research on plant stress responses and the development of salt-tolerant tobacco cultivars.

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