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|a 10.1094/PDIS-06-23-1118-PDN
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|a eng
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|a Kwak, Hae-Ryun
|e verfasserin
|4 aut
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|a First report of konjac mosaic virus in Spuriopimpinella brachycarpa in Korea
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|c 2023
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 08.08.2023
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a Spuriopimpinella brachycarpa Nakai (Common name, Chamnamul; family Apiaceae) is a plant whose leaves are consumed as a vegetable and used as a folk medicine in Korea (Kim et al., 2020). In February 2020, seven samples of S. brachycarpa leaf showing virus symptoms including yellowing, vein chlorosis, chlorotic lesions, and severe mottling were collected from a greenhouse in Busan, South Korea, to diagnose the potential disease (Fig. S1a, b). The disease incidence rate in the greenhouse was >10% (2,970 m2). To identify the causal virus, we analyzed leaf dip preparation and thin sections of the symptomatic leaves by transmission electron microscopy. Filamentous virus particles and pinwheel structures were observed, indicating the presence of a potyvirus (Fig. S1c, d). To confirm these results, the symptomatic leaf samples were further analyzed by reverse-transcription polymerase chain reaction (RT-PCR) using potyvirus universal primers (Table S2) and direct sequencing of the PCR products. All samples were positive for konjac mosaic virus (KoMV). To exclude the possibility of infection by multiple viruses, we performed high-throughput sequencing (HTS) on an Illumina NovaSeq 6000 system (Macrogen Inc., Seoul, South Korea). There were two contigs (9,267 and 2,851 nt) mapping to KoMV sequences. A large contig (9,267 nt; 705,967 mapped reads; mean read coverage of 11,351.4x) showed about 80% identity (93% coverage) with KoMV-F (GenBank accession no. NC_007913) isolated from Amorphophallus konjac in Japan (Nishiguchi et al., 2006). To isolate KoMV from S. brachycarpa, we mechanically inoculated leaf extracts from symptomatic samples onto Chenopodium quinoa as an assay host via three single-lesion passages, followed by propagation in Nicotiana benthamiana. In a bioassay of the KoMV isolate (KoMV-BS), we mechanically inoculated sap from infected N. benthamiana onto 31 indicator plants including Cryptotaenia japonica (Apiaceae), which is similar to S. brachycarpa (Table S3). KoMV-BS systemically induced vein chlorosis and/or leaf mottling in four Nicotiana species and C. japonica, and chlorotic local lesions in upper leaves of C. quinoa; no symptoms were observed in 25 other indicator plants. These results were confirmed by RT-PCR. Next, we obtained the complete genome sequence of KoMV-BS using HTS and 5' and 3' rapid amplification of cDNA ends, with newly designed primers (Table S2). The assembled full-length KoMV-BS genome sequence was 9,392 nt in length, excluding the poly(A) tail, and encoded a polyprotein composed of 3,060 amino acids. The sequence was deposited in GenBank (accession no. OR001914). BLAST analysis showed 84~88% and 90~98% identities at CP nucleotide and amino acid levels, respectively with the reported KoMV isolates, confirming the virus to be an isolate of KoMV (synonym; Japanese hornwort mosaic virus, zantedeschia mosaic virus) (Adams et al., 2005; Nishiguchi et al., 2006). KoMV infection was first reported in A. konjac from Japan (Shimoyama et al. 1992) and has been spread worldwide as one of the major causal agents of viral diseases in calla lily (Liao et al., 2020). To the best of our knowledge, this is the first report of KoMV infection in S. brachycarpa. To date, cucumber mosaic virus and tobacco mosaic virus have been reported to infect S. brachycarpa in Korea (Yoon et al., 2016; 2017). Our findings will be helpful for developing virus-management strategies to prevent yield and quality loss in S. brachycarpa
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|a Journal Article
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|a <italic>Spuriopimpinella brachycarpa</italic>
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|a Apiaceae
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|a konjac mosaic virus
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|a potyvirus
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|a Byun, Hee-Seong
|e verfasserin
|4 aut
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|a Lee, Kang-Hee
|e verfasserin
|4 aut
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|a Kim, Hyun-Sun
|e verfasserin
|4 aut
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|a Choi, Hong-Soo
|e verfasserin
|4 aut
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|a Lee, Bongchoon
|e verfasserin
|4 aut
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|a Kim, Mikyeong
|e verfasserin
|4 aut
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|i Enthalten in
|t Plant disease
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