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园艺学报 ›› 2025, Vol. 52 ›› Issue (3): 749-760.doi: 10.16420/j.issn.0513-353x.2024-0050

• 植物保护 • 上一篇    下一篇

13种类病毒RNA/DNA基因组对番茄的侵染性鉴定

陆秀萍1,*, 汤智超1,*, 唐文琨1, 毛妃凤2, 张万萍1, 李经纬1,**()   

  1. 1 贵州大学农学院,贵州 550025
    2 贵州省果树蔬菜工作站,贵州 550001
  • 收稿日期:2024-11-08 修回日期:2025-01-09 出版日期:2025-03-25 发布日期:2025-03-25
  • 通讯作者:
    **E-mail:
  • 作者简介:

    *共同第一作者

  • 基金资助:
    国家自然科学基金项目(32102396); 贵州省高原特色蔬菜绿色生产科技创新人才团队项目(黔科合平台人才-CXTD[2022]003); 贵州省高原特色蔬菜产业技术体系项目

Identification of Infectivity of 13 Viroid RNA and DNA Genomes of Tomato

LU Xiuping1, TANG Zhichao1, TANG Wenkun1, Mao Feifeng2, ZHANG Wanping1, LI Jingwei1,**()   

  1. 1 Vegetable Industry Research Institute of Guizhou University,Guizhou Guiyang,Guizhou 550025,China
    2 Guizhou Provincial Fruit and Vegetable Workstation,Guizhou 550001,China
  • Received:2024-11-08 Revised:2025-01-09 Published:2025-03-25 Online:2025-03-25

摘要:

选取13种在园艺植物上报道较多的类病毒,将其人工合成的cDNA通过Sac I和Spe I酶切后,经T7酶体外转录为常规RNA基因组,同时利用PCR合成各类病毒DNA全长基因组,将RNA和DNA基因组机械摩擦接种于Ailsa Craig番茄苗上,并通过RT-PCR和RT-qPCR检测不同类病毒对番茄的侵染效率。分别以RNA和DNA形式进行类病毒基因组人工接种,结果表明,除了常规的RNA基因组外,类病毒DNA基因组亦具有侵染性,少量类病毒RNA和DNA基因组侵染性存在差异。总体来看,13种类病毒均可侵染番茄,并引起植株矮化、落叶、叶片卷曲、革质和黄化等病症。其中侵染性较强的为CChMVd、ELVd-1、PSTVd、TCDVd、TPMVd和HSVd,其在感染植株中滴度较高,引起的病情指数较高。PLMVd在植株内平均滴度较低,但致病性较高。侵染后RT-PCR检测产物与人工合成cDNA序列测序基本一致。

关键词: 番茄, 类病毒, RNA基因组, cDNA基因组, 侵染性评价

Abstract:

Thirteen types of viroids that have been widely reported in horticultural plants were selected. Their artificially synthesized cDNA was digested by Sac I and Spe I enzymes and transcribed into conventional RNA genomes in vitro by T7 enzyme. At the same time,PCR was used to synthesize full-length genomes of various viroids DNA genome. The RNA and DNA genomes were mechanically rubbed and inoculated onto Ailsa Craig tomato seedlings,and the infection efficiency of different types of viroids on tomatoes was detected by RT-PCR and RT-qPCR. Artificial inoculation of viroid genomes was conducted in both RNA and DNA forms,and the results showed that in addition to the conventional RNA genomes,the viroid DNA genomes also have infectivity,with differences in infectivity between a small amount of viral RNA and DNA genomes. Overall,all 13 types of viroids can infect tomatoes and cause diseases such as plant dwarfism,leaf shedding,leaf curling,leatheriness,and yellowing. Among them,CChMVd,ELVd-1,PSTVd,TCDVd,TPMVd,and HSVd have stronger infectivity,with higher titers in infected plants and higher disease indices. PLMVd has a lower average titer within the plant,but higher pathogenicity. The RT-PCR detection products after infection are basically consistent with the sequencing of artificially synthesized cDNA sequences.

Key words: tomato, viroid, RNA genome, cDNA genome, infectivity evaluation