数字农科院2.0

Identification, Characterization, Expression Profiling and Functional Analysis of Tobacco CalS Gene Family

文献类型： 外文期刊

作者： Wang, Hong;Meng, He;Qi, Xiaohan;Pan, Yi;Ji, Bailu;Wen, Liuying;Zan, Yanjun;Si, Huan;Wang, Yuanying;Liu, Dan;Yang, Aiguo;Liu, Zhengwen;Cheng, Lirui

作者机构：

关键词： callose synthase;CalS gene family;Nicotiana tabacum;expression analysis;gene editing;stress response

期刊名称： AGRONOMY-BASEL

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年卷期： 2025 年 15 卷 4 期

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收录情况： SCIE（2025版）

摘要： Callose plays an important role in plant development and in response to a wide range of biotic and abiotic stresses. However, the systematic identification of callose synthase (CalS), the major enzyme for callose biosynthesis, has been delayed in crops, especially in Solanaceae. In the current research, 18 CalS genes (NtCalS1-NtCalS18) were identified in Nicotiana tabacum and classified into four subfamilies. A comprehensive analysis of their physicochemical properties, gene structure, and evolutionary history highlighted their evolutionary conservation. We also identified a number of NtCalSs that responded to the infection with Phytophthora nicotianae and Ralstonia solanacearum, as well as to drought and cold treatments, by analyzing RNA-seq data. NtCalS1 and NtCalS12, a highly homologous gene pair, were selected to create mutants using the CRISPR-Cas9 technology for their drastic response to Phytophthora nicotianae infection as well as the strong expression levels in roots. The mutants with the simultaneous knockout of NtCalS1 and NtCalS12, compared with the control plants, displayed more resistance to tobacco black shank caused by Phytophthora nicotianae. Furthermore, the real-time quantitative PCR (qRT-PCR) assay showed that the knockout of NtCalS1 and NtCalS12 activated the signaling pathways mediated by plant hormones salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) before and after the infection of Phytophthora nicotianae and thus may have contributed to tobacco immunity against black shank. These findings contribute valuable information for further understanding the roles of CalS genes in tobacco stress responses and provide alternative genes for resistance improvement.

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