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Open Access

ARTICLE

A Comprehensive Expression Atlas of Nicotiana tabacum: Revealing Specificity Expression Patterns and Regulatory Variants

Shizhou Yu1,2, Jie Zhang1, Linggai Cao1, Jie Liu1, Peng Lu3, Jiemeng Tao3, Xueliang Ren1, Zhixiao Yang1,2,*
1 Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang, China
2 Guizhou Provincial Key Laboratory for Tobacco Quality Improvement and Efficiency Enhancement, Guiyang, China
3 China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
* Corresponding Author: Zhixiao Yang. Email: email

Phyton-International Journal of Experimental Botany https://doi.org/10.32604/phyton.2026.073509

Received 19 September 2025; Accepted 08 January 2026; Published online 19 January 2026

Abstract

Tobacco (Nicotiana tabacum, 2n = 48) is a key non-food economic crop, yet its stress response and gene regulatory mechanisms remain poorly understood. By analyzing 603 transcriptome datasets, this study identified 1405 tissue-specific genes, revealing tissue-specific synthesis of terpenoids and other ecologically important secondary metabolites in sepals and other tissues. Comparative stress-response analysis highlighted distinct gene expression patterns in leaves and roots under biotic and abiotic stresses. Additionally, 28,396 expression quantitative trait loci (eQTLs) were mapped in leaves, offering valuable genetic regulatory markers. These findings provide crucial insights into tobacco’s gene expression characteristics and their functional implications, serving as a foundation for future research.

Keywords

Tobacco; eQTLs; regulatory loci; transcriptional atlas

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