Genome-wide characterization and expression profiling of the PDR gene family in tobacco (Nicotiana tabacum)

文献类型： 外文期刊

第一作者： Xie, Xiaodong

作者： Xie, Xiaodong;Cao, Peijian;Wang, Zhong;Wu, Mingzhu;Zhang, Jianfeng;Yang, Jun;Gao, Junping;Li, Xiaoxu;Wang, Yaofu;Gong, Daping

作者机构：

关键词： N; tabacum; Pleiotropic drug resistance; Evolution; Expression profiles; Abiotic; biotic stresses

期刊名称：GENE （ 影响因子：2.984； 五年影响因子：2.702 ）

ISSN： 0378-1119

年卷期： 2021 年 788 卷

页码：

收录情况： SCI

摘要： The pleiotropic drug resistance (PDR) proteins of the ATP-binding cassette (ABC) family play essential roles in physiological processes and have been characterized in many plant species. However, no comprehensive investigation of tobacco (Nicotiana tabacum), an important economic crop and a useful model plant for scientific research, has been presented. We identified 32 PDR genes in the tobacco genome and explored their domain organization, chromosomal distribution and evolution, promoter cis-elements, and expression profiles. A phylogenetic analysis revealed that tobacco has a significantly expanded number of PDR genes involved in plant defense. It also revealed that two tobacco PDR proteins may function as strigolactone transporters to regulate shoot branching, and several NtPDR genes may be involved in cadmium transport. Moreover, tissue expression profiles of NtPDR genes and their responses to several hormones and abiotic stresses were assessed using quantitative real-time PCR. Most of the NtPDR genes were regulated by jasmonate or salicylic acid, suggesting the important regulatory roles of NtPDRs in plant defense and secondary metabolism. They were also responsive to abiotic stresses, like drought and cold, and there was a strong correlation between the presence of promoter ciselements and abiotic/biotic stress responses. These results provide useful clues for further in-depth studies on the functions of the tobacco PDR genes.

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