烟草CONSTANS-like基因家族的鉴定与分析
收稿日期: 2020-08-25
录用日期: 2021-01-05
网络出版日期: 2021-01-05
基金资助
国家自然科学基金(32070340);郑州烟草研究院院长科技发展基金(902018CA0280)
Genome-wide Identification and Analysis of CONSTANS-like Gene Family in Nicotiana tabacum
Received date: 2020-08-25
Accepted date: 2021-01-05
Online published: 2021-01-05
烟草(Nicotiana tabacum)是基因功能分析的模式植物以及重要的经济作物之一, 适宜的生存环境对烟草的生长和繁殖至关重要。COL (CONSTANS-like)基因家族编码蛋白不仅调控植物开花, 而且在植物生物/非生物胁迫响应中发挥重要作用。该研究通过鉴定烟草COL基因家族成员, 分析其基因结构、进化关系、转录调控元件和表达模式, 探究其编码蛋白的生物学功能, 尤其是在烟草响应低温胁迫中的可能作用。结果显示, 在烟草中共鉴定出15个COL基因, 其编码的蛋白理化性质相近; 进化分析结果表明其包括3类, 每个类别的成员之间具有相似的外显子/内含子结构以及motif数量和类型; 烟草COL基因启动子区域含有大量与光、低温、干旱以及植物激素等响应相关的顺式作用元件; 基于二代高通量测序分析结果表明, 低温显著影响烟草COL基因的表达, 但对不同基因的影响存在差异, 不同COL基因的亲本(林烟草(N. sylvestris) (母本)和绒毛状烟草(N. tomentosiformis) (父本))具有表达偏好性, 且这种偏好性大部分会从6-7叶期保持到现蕾期。
张雅文, 梁山, 徐国云, 郭无瑕, 邓书林 . 烟草CONSTANS-like基因家族的鉴定与分析[J]. 植物学报, 2021 , 56(1) : 33 -43 . DOI: 10.11983/CBB20147
Nicotiana tabacum (tobacco) is one of the model plants for molecular biology research as well as an important economic crop in the world. A suitable living environment is essential for the growth and reproduction of tobacco. CONSTANS-like (COL) family proteins are not only key regulators for flowering time, but also play important roles in stress response of plants. Our aim was to identify the COL family members, analyze their gene structure, evolutionary relationship, transcriptional regulatory elements and expression patterns, and explore their possible functions in response to cold stress in tobacco. We identified a total of 15 COL genes with similar physiochemical properties in tobacco. Evolutionary analysis divided all COL genes into three categories, and similar intron structure and motif distribution were observed among genes within each category. The promoter regions of tobacco COL genes contain a large number of cis-acting elements related to responses to light, low temperature, drought and phyto hormone. Gene expression analysis showed that low temperature significantly affected the expression of COL genes in tobacco, but the effects on different genes were different. Our study showed different parental (N. sylvestris (maternal) and N. tomentosiformis (paternal)) expression bias between different COL genes in tobacco, and most of the bias patterns were maintained from 6-7 leaf stage to budding stage.
Key words： Nicotiana tabacum; COL; phylogeny; low temperature; expression bias
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