中国农业科学 ›› 2022, Vol. 55 ›› Issue (1): 134-151.doi: 10.3864/j.issn.0578-1752.2022.01.012

• 园艺 • 上一篇    下一篇

基于转录组分析ABA促进葡萄花青苷积累相关基因

徐献斌(),耿晓月,李慧,孙丽娟,郑焕,陶建敏()   

  1. 南京农业大学园艺学院,南京 210095
  • 收稿日期:2021-03-15 接受日期:2021-06-08 出版日期:2022-01-01 发布日期:2022-01-07
  • 通讯作者: 陶建敏
  • 作者简介:徐献斌,E-mail: 619262966@qq.com
  • 基金资助:
    国家现代农业葡萄产业技术体系(CARS-29);国家自然科学基金(31901975);国家自然科学基金(31972384);江苏农业产业技术体系(JATS[2021]450);江苏省农业重大新品种创制项目(PZCZ201723);国家重点研发计划(2020YFD1000204)

Transcriptome Analysis of Genes Involved in ABA-Induced Anthocyanin Accumulation in Grape

XU XianBin(),GENG XiaoYue,LI Hui,SUN LiJuan,ZHENG Huan,TAO JianMin()   

  1. College of Horticulture, Nanjing Agricultural University, Nanjing 210095
  • Received:2021-03-15 Accepted:2021-06-08 Online:2022-01-01 Published:2022-01-07
  • Contact: JianMin TAO

摘要:

【目的】分析参与调控ABA促进葡萄着色的相关基因,探讨ABA促进葡萄果实花青苷积累的分子机制。【方法】以‘红巴拉多’葡萄为试材,在转色前期(约花后6周)使用300 mg∙L-1 ABA对果穗进行浸果处理,以清水处理为对照。观察表型,并利用超高液相色谱质谱联用仪(UPLC-MS)测定花青苷组分及含量,再利用转录组测序技术从分子水平对ABA促进花青苷积累的机制进行生物信息学分析。【结果】外源ABA处理3 d后,葡萄果实着色明显加深,花青苷种类和含量增多,其中芍药素3-O-葡萄糖苷、锦葵色素3-O-葡萄糖苷两种单体花青苷含量增加最为显著。分析ABA处理18 h和3 d后葡萄果实转录水平的差异,并通过KEGG富集分析发现了11个ABA信号通路基因以及52个与花青苷生物合成和转运相关的基因差异表达,它们均在外源ABA处理后表达上调。通过将差异基因与葡萄转录因子库进行比对,共发现297个转录因子差异表达。进一步分析差异转录因子表达模式,筛选与VvMYBA1表达模式相近的转录因子,发现15个MYB、bHLH、bZIP、NAC、Dof、HD-ZIP等家族的转录因子,其可能参与调控花青苷生物合成。启动子顺式作用元件分析表明,大部分筛选到的差异基因启动子中含有ABRE元件,说明这些差异表达基因的启动子可能为ABA诱导型启动子。对部分候选基因的表达模式进行实时荧光定量(qRT-PCR)分析,证实了RNA-seq的准确性。【结论】ABA促进葡萄花青苷积累涉及11个ABA信号转导、52个花青苷合成和转运相关基因,15个转录因子可能参与调控了这一生物过程。研究结果为揭示ABA促进葡萄花青苷积累的分子机制提供了一定基础。

关键词: 葡萄, 花青苷, ABA, 转录组, 启动子

Abstract:

【Objective】 The aim of this study was to analyze the genes involved in the regulation of ABA induced grape coloring, and to explore the molecular mechanism of ABA induced anthocyanin accumulation in grape. 【Method】 In present study, Benibalado was used as the experimental material. In the early stage of veraison, the grape clusters were treated with 300 mg·L-1ABA, water treated as control. The grape phenotypes were observed and anthocyanins were determined by UPLC-MS. The mechanism of ABA promoting anthocyanin accumulation was analyzed by transcriptome sequencing. 【Result】 After 3 days of exogenous ABA treatment, the grape berries were obviously colored, and the variety and content of anthocyanins were also increased. Among them, Peonidin 3-O-glucoside and Malvidin 3-O-glucoside increased most significantly. By KEGG enrichment analysis, 11 DEGs related to ABA signaling and 52 DEGs that related to anthocyanin biosynthesis, and transportation were identified, all of which were up-regulated. After exogenous ABA treatment, the DEGs from RNA-seq were searched by using BLAST against the grape TF database, and 297 transcription factors were identified. Through the further analyzing of the expression patterns of identified TFs, 15 members of MYB, bHLH, bZIP, NAC, Dof, and HD-ZIP families were observed to regulate anthocyanin biosynthesis. The analyzing of cis-acting elements in promoters showed that ABREs were identified in most of the promoters. The accuracy of RNA-seq was validated by qRT-PCR analysis of some candidate genes. 【Conclusion】 Overall, ABA promoting anthocyanin accumulation in grape was a complex process, including 11 DEGs related to ABA signal transduction, 52 DEGs that related to anthocyanin biosynthesis, modification and transportation, 15 transcription factors. This study provided a basis for revealing the molecular mechanism of ABA promoting anthocyanin accumulation in grape fruits.

Key words: grape, anthocyanin, ABA, RNA-seq, promoter