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|a 10.1094/PDIS-03-22-0677-PDN
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|a eng
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|a Qiu, Runshuang
|e verfasserin
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|a First Report of Tobacco Mosaic Virus Infecting Anisomeles indica (L.) Kuntze in China
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|c 2022
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|a Text
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|a ƒaComputermedien
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|a Date Revised 16.02.2024
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|a Anisomeles indica (L.) Kuntze is a perennial erect herb that belongs to the genus Epimeredi, family Labiatae (Hsieh et al., 2008). This herb is distributed in several southern provinces such as Yunnan, Sichuan and Guizhou in China, and it is also exported to Southeast Asian countries such as Singapore and Malaysia (Li., 2010; Yao et al., 2019). Due to its market potential and broad development prospects, the herb has been cultivated in Yunnan. In August 2021, virus-like symptoms on leaves, including shrinking, mosaic, and yellow mottling(Fig S1. A) appeared on approximately 80% of A. indica in the experimental fields of the Kunming Institute of Botany, Chinese Academy of Science, in Kunming, Yunnan. To unveil the possible viral agents associated with the disease symptoms, leaf samples were collected from 5 plants for transmission electron microscopy (TEM) analysis using negative staining (Zhang et al., 2016). Rhabditiform-shaped particles around 300 × 18 nm (Fig S1. C) were observed, which resemble those of tobamoviruses. To identify the exact virus, total RNA was extracted from the 20 leaf samples using the RNA-easy Isolation Reagent (Vazyme, Nanjing, China), followed by reverse transcription (RT)-PCR with a degenerate tobamovirus primer pair (Li et al., 2014). A 480-bp amplicon was obtained from each sample and cloned into the pMD18-T vector for Sanger sequencing (Takara, Dalian, China). BLASTn-analysis revealed that the 20 amplicons were identical and shared 100% nucleotide sequence identity with tobacco mosaic virus (TMV) isolate Bei Cang Zhu from Atractylodes lancea (acc. no. KU198186) One sequence was deposited in the GenBank under the accession number OK489807. ELISA testing with TMV-specific antibody (Agdia, USA) produced positive results for all of the 20 leaf samples. In order to understand the difference between TMV isolates from A. indica and those form other host plants, the sequences of movement protein (MP, 807 bp) and RNA-dependent RNA polymerase (RdRp, 3351 bp) of TMV were also obtained from one of the TMV infected samples using the target gene special primers (Tab. S1), and submitted to GenBank under the accession number OM3662406 (MP) and OM366242 (RdRp). BLASTn-analysis revealed that the amplicon of MP shared 97.75% nucleotide sequence identity with TMV isolate Henan 9-2-2017 from sweet potato (MN186255.1) and RdRp shared 97.43% nucleotide sequence identity with TMV isolate SXFQ from Solanum lycopersicum (JX993906.1). Phylogenetic analysis indicated that the isolate of A. indica grouped with several TMV isolates (e.g., tomato, AF103779.1 and tobacco, HE818449.1) from Northern China. The virus was successfully transmitted onto healthy A.indica plants (n = 5) upon mechanical inoculation as the plants not only developed foliar distortion symptoms but also tested positive for TMV by RT-PCR with the CP-specific primers (Tab. S1). Taken together, our results demonstrated that the diseased A. indica plants were infected with TMV. To our knowledge, this is the first report of TMV infected A. indica (L.) Kuntze in China. Symptomatic phenotype-based field surveys on some plantations in Yunnan Province indicated that the disease incidence ranged from 70% to 90%, resulting in significant loss of production of A. indica. It is necessary to monitor the viruses in the fields and find effective methods to protect TMV in the A. indica (L.) Kuntze industry
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|a Journal Article
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|a Anisomeles indica (L.) Kuntze
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|a China
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| 650 |
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|a Tobacco mosaic virus (TMV)
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|a Zhang, Lizhen
|e verfasserin
|4 aut
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| 700 |
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|a Hu, Zhonghui
|e verfasserin
|4 aut
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| 700 |
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|a Du, Yumeng
|e verfasserin
|4 aut
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| 700 |
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|a Zheng, Xue
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|4 aut
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| 700 |
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|a Zhang, Zhongkai
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|4 aut
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| 700 |
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|a Zhao, Lihua
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