Journal of Integrative Agriculture ›› 2021, Vol. 20 ›› Issue (7): 1871-1879.DOI: 10.1016/S2095-3119(20)63275-0

所属专题: 植物病理合辑Plant Protection—Plant Pathology 植物病毒合辑Plant Virus

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  • 收稿日期:2020-03-28 出版日期:2021-07-01 发布日期:2021-06-02

Biological and molecular characterization of tomato brown rugose fruit virus and development of quadruplex RT-PCR detection

YAN Zhi-yong*, ZHAO Mei-sheng*, MA Hua-yu*, LIU Ling-zhi, YANG Guang-ling, GENG Chao, TIAN Yan-ping, LI Xiang-dong
  

  1. Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai’an 271018, P.R.China
  • Received:2020-03-28 Online:2021-07-01 Published:2021-06-02
  • Contact: Correspondence LI Xiang-dong, Tel: +86-538-8242523, E-mail: xdongli@sdau.edu.cn; GENG Chao, E-mail: gengchaoemail@163.com
  • About author:YAN Zhi-yong, E-mail: yzy_1990@163.com; ZHAO Mei-sheng, E-mail: 18864805872@163.com; MA Hua-yu, E-mail: 1283437100@qq.com; * These authors contributed equally to this study.
  • Supported by:
    This study was supported by the grants from the National Natural Science Foundation of China (31720103912 and 31801704) and the ‘Taishan Scholar’ Construction Project, China (TS201712023).

摘要:

番茄褐色皱果病毒(tomato brown rugose fruit virus,ToBRFV)是2015年首次报道的一种烟草花叶病毒属病毒,是番茄安全生产的严重威胁。该病毒已经传播到美洲、亚洲和欧洲的十个国家。2019年,ToBRFV在中国山东发生。本论文旨在明确ToBRFV山东分离物(ToBRFV-SD)的症状、寄主范围和分子特性,并建立一种有效的检测方法。田间调查ToBRFV-SD在不同品种的症状表现。将ToBRFV-SD接种辣椒、本氏烟、马铃薯、茄子、中烟102和50个番茄品种,鉴定其寄主范围。分段克隆ToBRFV-SD基因组片段,并测定其序列;利用BioEdit version 7.2.6比对ToBRFV所有分离物的全基因组序列,分析序列一致率;利用MEGA version 10.1.5构建系统发育树。根据ToBRFV、烟草花叶病毒(tobacco mosaic virus,TMV)、番茄花叶病毒(tomato mosaic virus,ToMV)和番茄斑萎病毒(tomato spotted wilt virus,TSWV)等四种番茄重要病毒基因组的保守区域设计特异性引物,建立四重RT-PCR检测体系。ToBRFV-SD在番茄叶片引起不同程度的花叶和疱斑,在花萼和花梗上引起坏死,在番茄果实上引起畸形、黄斑和褐色皱缩坏死斑。ToBRFV-SD可侵染番茄、辣椒和本氏烟,隐症侵染马铃薯、茄子和烟草品种中烟102。测试的50个番茄品种均不抗ToBRFV-SD。ToBRFV-SD和以色列分离物ToBRFV-IL基因组的核苷酸和氨基酸一致率最高。在基于全基因组序列的系统进化树中,所有ToBRFV分离物聚集到一个分枝,与烟草花叶病毒分枝距离较近。随后,我们建立了四重RT-PCR检测体系,能够通过一个RT-PCR反应,同时检测并区分ToBRFV、TMV、ToMV和TSWV。本研究明确了ToBRFV-SD的症状、寄主范围和分子特性,建立了能区分ToBRFV、TMV、ToMV和TSWV四重RT-PCR检测体系,对指导ToBRFV的早期检测和防控有积极作用。


Abstract:

Tomato brown rugose fruit virus (ToBRFV) is a novel tobamovirus firstly reported in 2015 and poses a severe threat to the tomato industry.  So far, it has spread to 10 countries in America, Asia, and Europe.  In 2019, ToBRFV was identified in Shandong Province (ToBRFV-SD), China.  In this study, it was shown that ToBRFV-SD induced mild to severe mosaic and blistering on leaves, necrosis on sepals and pedicles, and deformation, yellow spots, and brown rugose necrotic lesions on fruits.  ToBRFV-SD induced distinct symptoms on plants of tomato, Capsicum annumm, and Nicotiana benthamiana, and caused latent infection on plants of Solanum tuberosum, Solanum melongena, and N. tabacum cv. Zhongyan 102.  All the 50 tomato cultivars tested were highly sensitive to ToBRFV-SD.  The complete genomic sequence of ToBRFV-SD shared the highest nucleotide and amino acid identities with isolate IL from Israel.  In the phylogenetic tree constructed with the complete genomic sequence, all the ToBRFV isolates were clustered together and formed a sister branch with tobacco mosaic virus (TMV).  Furthermore, a quadruplex RT-PCR system was developed that could differentiate ToBRFV from other economically important viruses affecting tomatoes, such as TMV, tomato mosaic virus, and tomato spotted wilt virus.  The findings of this study enhance our understanding of the biological and molecular characteristics of ToBRFV and provide an efficient and effective detection method for multiple infections, which is helpful in the management of ToBRFV.

Key words: host range ,  identity ,  quadruplex RT-PCR detection ,  phylogenetic tree ,  symptom ,  tobamovirus ,  tomato brown rugose fruit virus