生物技术通报 ›› 2022, Vol. 38 ›› Issue (4): 126-142.doi: 10.13560/j.cnki.biotech.bull.1985.2021-1048

• 研究报告 • 上一篇    下一篇

利用RNA-Seq鉴定调控甘蓝型油菜叶片光合特性的低温胁迫应答基因

金姣姣1(), 刘自刚2, 米文博2, 徐明霞2, 邹娅2, 徐春梅2, 赵彩霞3   

  1. 1.陇东学院农林科技学院 陇东旱地作物种质改良及产业化协同创新中心 甘肃省旱地冬小麦种质创新与应用工程研究中心,庆阳 745000
    2.甘肃省共建干旱生境作物学国家重点实验室 甘肃农业大学,兰州 730070
    3.西藏自治区农牧科学院农业研究所,拉萨 860000
  • 收稿日期:2021-08-17 出版日期:2022-04-26 发布日期:2022-05-06
  • 作者简介:金姣姣,女,硕士,助教,研究方向:作物遗传育种;E-mail: 631981312@qq.com
  • 基金资助:
    甘肃省教育厅产业支撑计划项目(2021CYZC-46);西藏农科院农科所统筹基金项目(2021NKS-TCJJ-001);陇东学院青年科技创新基金项目(XYZK2106);博士基金项目(2021QB-035);中央引导地方科技专项资金(ZCYD2020-2-3)

Identification of Low Temperature Stress-responsive Genes Regulating Photosynthetic Characteristics in the Leaves of Brassica napus by RNA-Seq

JIN Jiao-jiao1(), LIU Zi-gang2, MI Wen-bo2, XU Ming-xia2, ZOU Ya2, XU Chun-mei2, ZHAO Cai-xia3   

  1. 1. College of Agriculture and Forestry,Longdong University/Longdong Co-Innovation Center for Germplasm Improvement and Industrialization of Dryland Crops/ Gansu Province Germplasm Innovation and Application Engineering Research Center of Dryland Winter Wheat,Qingyang 745000
    2. Gansu Provincial Key Laboratory of Arid Land Crop Sciences/College of Agronomy,Gansu Agricultural University,Lanzhou 730070
    3. Institute of Agriculture,Tibet Academy of Agriculture and Animal Husbandry Sciences,Lhasa 860000
  • Received:2021-08-17 Published:2022-04-26 Online:2022-05-06

摘要:

明晰甘蓝型油菜光合特性对低温胁迫的响应,鉴定相关应答基因,以耐寒材料17NS和敏感材料NF24为研究对象,通过Illumina HiSeqTM 2000平台进行RNA-Seq分析,探讨-4℃处理24 h后甘蓝型油菜的叶片形态、光合参数、叶片超微结构、基因调控表达模式等响应低温胁迫的分子机制。结果表明,低温胁迫下甘蓝型油菜响应光合调控的显著富集途径为光合作用途径和光合作用-天线蛋白途径,这两种途径中有64个特异表达基因,其中8个上调表达,56个下调表达,大部分注释到分子组成和生物学过程中,证实了光合作用与低温胁迫导致的幼苗叶片萎蔫、叶绿体数量和形态发生变化、类囊体结构受损、相对电解质渗透率增加等现象有关。通过qRT-PCR鉴定,前17个DEGs的表达模式与RNA-Seq分析结果一致,证实了RNA-Seq结果的可靠性,其中BnFd1(LOC106350097)和BnCP26(LOC106440450)均响应低温胁迫上调表达。BnFd1编码氨基酸产物是叶绿体上的铁氧还蛋白1(BnFd1),属于不稳定亲水蛋白,定位于叶绿体和细胞质中,存在一个信号肽,属于PLNO3136超家族,存在保守的Fd1结构域;BnCP26编码氨基酸产物是类囊体上叶绿素a-b结合蛋白CP26(BnCP26),属于稳定亲水蛋白,位于叶绿体中,无信号肽,属于叶绿素a_b结合超家族,存在保守的叶绿素A-B结合蛋白结构域。成功鉴定出2个甘蓝型油菜叶片低温应答基因BnFd1BnCP26,与光合特性调控关系密切,物种间功能保守。

关键词: 甘蓝型油菜, 低温胁迫, 差异表达基因, BnFd1, BnCP26

Abstract:

In order to clarify the response of photosynthetic characteristics to low temperature stress in Brassica napus L.,using cold-resistant material 17NS and cold-sensitive material NF24 as study object,Illumina HiSeqTM 2000 platform was applied to have RNA-Seq analysis,the molecular mechanism of B. napus responding to low temperature,such as leaf morphology,photosynthetic parameters,leaf ultrastructure and gene regulation expression pattern treated at -4℃ for 24 h was investigated. The results showed that the photosynthetic pathway and the photosynthesis-antenna protein pathway were significantly enriched in B. napus in response to low temperature stress. In these two pathways,64 genes were specifically expressed,including 8 up-regulated genes and 56 down-regulated genes,most of which were noted in molecular composition and biological process. It was confirmed that photosynthesis was related to leaf wilt,chloroplast number and morphology change,thylakoid structure damage and relative electrolyte permeability increase. qRT-PCR analysis showed that the expression patterns of the first 17 DEGs were consistent with RNA-Seq analysis results,confirming the reliability of RNA-Seq results. BnFd1LOC106350097)and BnCP26LOC106440450)were up-regulated in response to cold stress. The amino acid product encoded by BnFd1was the chloroplast ferridoretin 1(BnFd1),an unstable hydrophilic protein,which were located in the chloroplast and cytoplasm,there was a signal peptide,belonging to the PLNO3136 superfamily and had a conserved Fd1 domain. The amino acid product encoded by BnCP26 was the chlorophyll a-b binding protein CP26(BnCP26)on thylakoid,it was a stable hydrophilic protein located in chloroplast without signal peptide,and belonged to the chlorophyll a_b binding superfamily and had a conserved chlorophyll a-b binding protein domain. Two cold response genes BnFd1 and BnCP26 are successfully identified in B. napus L.,which are closely related to the regulation of photosynthetic characteristics and had conserved interspecies functions.

Key words: Brassica napus L., low temperature stress, differential expressed genes, BnFd1, BnCP26