外源NO缓解草地早熟禾镉胁迫的转录组分析

doi:10.11733/j.issn.1007-0435.2019.06.002

草地学报 ›› 2019, Vol. 27 ›› Issue (6): 1467-1476.DOI: 10.11733/j.issn.1007-0435.2019.06.002

外源NO缓解草地早熟禾镉胁迫的转录组分析

鲜靖苹^1,2, 王勇¹, 马晖玲¹

1. 甘肃农业大学草业学院, 草业生态系统教育部重点实验室, 甘肃省草业工程实验室, 中-美草地畜牧业可持续发展研究中心, 甘肃兰州 730070;
2. 新乡学院生命科学技术学院, 河南新乡 453000

收稿日期:2019-08-22 修回日期:2019-10-11 出版日期:2019-12-15 发布日期:2019-12-31
通讯作者: 马晖玲,E-mail:mahl@gsau.edu.cn
作者简介:鲜靖苹(1979-),女,甘肃通渭人,讲师,博士研究生,E-mail:63386780@qq.com
基金资助:
甘肃农业大学科技创新基金（学科建设基金）项目（GAU-XKJS-2018-018）；国家自然科学基金项目（31760699）资助

Transcriptome Analysis of Exogenous Nitric oxide on Alleviating Cadmium Stress in Kentucky Bluegrass

XIAN Jing-ping^1,2, WANG Yong¹, MA Hui-ling¹

1. College of Pratacultural Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Pratacultural Engineering Laboratory of Gansu Province, Sino-U. S. Center for Grazingland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
2. School of Science and Technology, Xinxiang University, Xinxiang, Henan Province 453000, China

Received:2019-08-22 Revised:2019-10-11 Online:2019-12-15 Published:2019-12-31

摘要/Abstract

摘要： 为揭示外源一氧化氮对草地早熟禾（Poa pratensis）镉（Cadmium，Cd）胁迫缓解机制，本试验采用高通量Illumina Hiseq测序技术研究了草地早熟禾根施1 000 μmol·L^-1氯化镉和叶面喷施50 μmol·L^-1 NO供体硝普钠24 h后转录组基因的差异表达。对测序数据进行分析结果显示，4个处理组共有22 730个差异表达基因，包括15 332个上调基因和7 398个下调基因。通过富集分析发现外源NO主要通过调控与信号转导、碳水化合物转运与代谢、氨基酸生物合成及苯丙烷生物合成等途径相关的基因缓解镉胁迫。此外，本研究对Cd处理与Cd+NO处理组的差异表达基因和代谢通路进行分析，筛选出了一系列由NO信号介导的草地早熟禾响应镉胁迫关键基因，并将其列为NO缓解草地早熟禾镉胁迫相关的候选基因。本研究为挖掘草地早熟禾耐镉相关调控基因和功能基因提供基础。

关键词: 草地早熟禾, 镉胁迫, 高通量测序, 转录组

Abstract: In order to reveal the mechanism of exogenous nitric oxide (NO) relieving the cadmium stress on Kentucky bluegrass (Poa pratensis),high-throughput Illumina Hiseq sequencing technique was applied to study the expression of transcriptomes in Kentucky Bluegrass treated with 1000 μmol·L^-1 CdCl₂ (Cadmium chloride hemidihydrate,CdCl₂·2.5H₂O) and 50 μmol·L^-1 NO donor sodium nitrate (SNP) for 24 h. The samples were divided into 4 treatment groups for transcriptome sequencing,namely the CK control group,NO treatment group,Cd stress treatment group,and Cd + NO treatment group. The analysis of the sequencing data showed that there were 22 730 differentially expressed genes,including 15 332 up-regulated genes and 7 398 down-regulated genes. Through enrichment analysis,it was found that exogenous NO alleviated cadmium stress mainly by regulating signal transduction genes related to carbohydrate transport and metabolic amino acid biosynthesis and phenylpropane biosynthesis. In addition,the differentially expressed genes and metabolic pathways between Cd and Cd + NO treatment groups were analyzed to screen out key genes mediated by NO signal in response to cadmium stress. At the same time,these genes were also selected as candidate genes for NO to alleviate cadmium stress of Kentucky bluegrass. This study provides a basis for further exploration of Cd-related regulatory genes and functional genes of Kentucky bluegrass.

Key words: Kentucky bluegrass, Cadmium stress, High-throughput sequencing, Transcriptome

中图分类号:

Q945.78

鲜靖苹, 王勇, 马晖玲. 外源NO缓解草地早熟禾镉胁迫的转录组分析[J]. 草地学报, 2019, 27(6): 1467-1476.

XIAN Jing-ping, WANG Yong, MA Hui-ling. Transcriptome Analysis of Exogenous Nitric oxide on Alleviating Cadmium Stress in Kentucky Bluegrass[J]. Acta Agrestia Sinica, 2019, 27(6): 1467-1476.

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外源NO缓解草地早熟禾镉胁迫的转录组分析

Transcriptome Analysis of Exogenous Nitric oxide on Alleviating Cadmium Stress in Kentucky Bluegrass

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