武立伟, 徐志超, 王清, 聂丽萍, 崔英贤, 王瑀, 宋经元, 姚辉*. 响应ABA胁迫的甘草bZIP转录因子的系统筛选与分析J. 药学学报, 2022,57(3): 818-830. doi: 10.16438/j.0513-4870.2021-1359
引用本文: 武立伟, 徐志超, 王清, 聂丽萍, 崔英贤, 王瑀, 宋经元, 姚辉*. 响应ABA胁迫的甘草bZIP转录因子的系统筛选与分析J. 药学学报, 2022,57(3): 818-830. doi: 10.16438/j.0513-4870.2021-1359
WU Li-wei, XU Zhi-chao, WANG Qing, NIE Li-ping, CUI Ying-xian, WANG Yu, SONG Jing-yuan, YAO Hui*. Systematic screening and analysis of bZIP transcription factors in Glycyrrhiza uralensis and their response to ABA stressJ. Acta Pharmaceutica Sinica, 2022,57(3): 818-830. doi: 10.16438/j.0513-4870.2021-1359
Citation: WU Li-wei, XU Zhi-chao, WANG Qing, NIE Li-ping, CUI Ying-xian, WANG Yu, SONG Jing-yuan, YAO Hui*. Systematic screening and analysis of bZIP transcription factors in Glycyrrhiza uralensis and their response to ABA stressJ. Acta Pharmaceutica Sinica, 2022,57(3): 818-830. doi: 10.16438/j.0513-4870.2021-1359

响应ABA胁迫的甘草bZIP转录因子的系统筛选与分析

Systematic screening and analysis of bZIP transcription factors in Glycyrrhiza uralensis and their response to ABA stress

  • 摘要: 甘草为我国最常用的大宗药材之一,主要分布在干旱、半干旱区域,有着重要的经济和生态价值。bZIP转录因子在植物生物或非生物胁迫响应、生长发育、次生代谢产物合成等方面具有重要的调控作用。本研究利用Illumina高通量测序技术对不同浓度脱落酸(ABA)处理的甘草转录组进行测序,并基于已发表的甘草全基因组数据,以拟南芥基因组中发现的bZIP序列为参照,鉴定了甘草中的bZIP转录因子。之后筛选ABA依赖bZIP转录因子基因作为候选基因,对其编码蛋白理化性质、结构以及外源ABA胁迫下基因的表达模式进行分析。共鉴定到69个甘草bZIP转录因子家族基因,命名为GubZIP1-69,并根据它们与拟南芥bZIP的同源相似性分为A~I以及S这10个亚家族。通过计算69个GubZIPs基因在不同外源ABA胁迫下的相对表达量,筛选出可能参与ABA信号通路的调控基因,即GubZIP1GubZIP5GubZIP8GubZIP30GubZIP33GubZIP56。外源ABA胁迫下候选GubZIPs基因的表达模式分析结果显示,与0 mg·L-1浓度ABA处理下相比,25 mg·L-1的ABA没有引起基因的表达模式发生变化,而在50 mg·L-1浓度ABA处理下的表达模式发生了明显的变化,说明这些基因的表达响应50 mg·L-1浓度的ABA,即基因相对表达量均在处理后3 h下降,6 h之后逐渐上升,除了GubZIP8,12 h后基因相对表达量较0 h均显著上升。本研究为进一步开展甘草bZIP转录因子功能研究,阐明其调控机制奠定了基础,为今后利用分子育种方法培育优质甘草品种提供了科学依据。

     

    Abstract: Licorice, one of the most commonly used medicinal materials in China, grows mainly in arid and semi-arid regions and has important economic and ecological values. Basic leucine zipper (bZIP) transcription factors in plants play an important role in regulating biological or abiotic stress responses, growth, and secondary metabolite synthesis. bZIP transcription factors in the published whole genome database of Glycyrrhiza uralensis were identified using bZIP sequences found in Arabidopsis thaliana genome as reference, and ABA-dependent bZIP genes were identified by using Illumina high-throughput sequencing. The physical and chemical properties, structure of the encoded proteins, and the gene expression patterns with exogenous ABA stress were analyzed. A total of 69 bZIP transcription factor genes were identified in G. uralensis, named Gubzip1-69, and they were divided into 10 subfamilies (A-I and S) according to their similarity to bZIPs of A. thaliana. By calculating the relative expression levels of the 69 GubZIPs genes under different concentrations of exogenous ABA stress, genes that may be involved in the regulation of ABA signaling pathways were identified, namely GubZIP1, GubZIP5, GubZIP8, GubZIP30, GubZIP33 and GubZIP56. The results of expression pattern analysis of these GubZIPs genes under exogenous ABA stress showed that the expression pattern of GubZIPs genes changed significantly with 50 mg·L-1 ABA. The relative expression levels of these genes decreased 3 h after treatment, and gradually increased 6 h after treatment. Except for GubZIP8, the relative expression levels of these genes were significantly increased after 12 h. Further research on the function of bZIP transcription factors of G. uralensis and elucidating their regulatory mechanisms should be of interest and will provide a scientific basis for cultivating high-quality cultivars of G. uralensis through molecular breeding methods.

     

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