Comparative transcriptome analysis reveals photosynthesis divergence in Nicotiana tabacum

文献类型： 外文期刊

第一作者： Ding, Yongliang

作者： Ding, Yongliang;Yuan, Jumin;Zhang, Xiongfeng;Li, Zhuo;Zhang, Haiwei;Chen, Renxiao;Xu, Na;Song, Wenjing;Li, Huilan;Fan, Zhongliang;Lv, Yuanda;He, Bing

作者机构：

关键词： Transcriptome; Photosynthesis; Biomass; Chlorophyll; Carotenoids; Tobacco mutant

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.2； 五年影响因子：6.2 ）

ISSN： 0926-6690

年卷期： 2025 年 230 卷

页码：

收录情况： SCI

摘要： Green plants capture sunlight through photosynthetic pigments, converting light energy into chemical energy and fix atmospheric CO2 into organic molecules essential for life. Crop biomass is determined by carbon assimilation during the growing season. Photosynthesis consists of light reactions and the Calvin-Benson cycle. Thus crop biomass is determined by two pivotal factors: the capacity to capture light energy (e.g., via photosynthetic pigments) and the efficiency of converting light energy into chemical energy stored in organic compounds through carbon assimilation pathways. ZY157 is an elite flue-cured tobacco strain cultivated through successive generations of selection from space-mutated K326 lines, and Y87 is the hybrid progeny of K326. Both of them exhibit higher biomass, more vigorous growth and stronger disease resistance compared to K326. Physiological analyses of ZY157, K326, and Y87 showed that chlorophyll a, chlorophyll b, lutein and beta-carotene content was significantly higher in ZY157 and Y87 than in K326. Transcriptomic analyses further revealed upregulated expression of key genes involved in chlorophyll and carotenoid biosynthesis in ZY157 and Y87 compared to K326. Moreover, some important genes of light reactions and the Calvin cycle were upregulated in ZY157 and Y87 compared to K326, including FNR, ATPD, SBPase and so on. The net photosynthetic rates of ZY157 and Y87 were significantly higher than that of K326. These results indicated that the photosynthesis divergence among ZY157, Y87 and K326 probably contributed to the growth differences among them. Our findings will provide theoretic basis and breeding materials for high photosynthetic efficiency breeding.

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