{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T14:38:39Z","timestamp":1788878319166,"version":"build-2803163510"},"reference-count":74,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,3,27]],"date-time":"2024-03-27T00:00:00Z","timestamp":1711497600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Viruses"],"abstract":"<jats:p>In 1929, it was reported that yellowing symptoms caused by a tobacco mosaic virus (TMV) yellow mosaic isolate were suppressed in tobacco plants that were systemically infected with a TMV light green isolate. Similar to vaccination, the phenomenon of cross-protection involves a whole plant being infected with an attenuated virus and involves the same or a closely related virus species. Therefore, attenuated viruses function as biological control agents. In Japan, many studies have been performed on cross-protection. For example, the tomato mosaic virus (ToMV)-L11A strain is an attenuated isolate developed by researchers and shows high control efficiency against wild-type ToMV in commercial tomato crops. Recently, an attenuated isolate of zucchini yellow mosaic virus (ZYMV)-2002 was developed and registered as a biological pesticide to control cucumber mosaic disease. In addition, attenuated isolates of pepper mild mottle virus (PMMoV), cucumber mosaic virus (CMV), tobacco mild green mosaic virus (TMGMV), melon yellow spot virus (MYSV), and watermelon mosaic virus (WMV) have been developed in Japan. These attenuated viruses, sometimes called plant vaccines, can be used not only as single vaccines but also as multiple vaccines. In this review, we provide an overview of studies on attenuated plant viruses developed in Japan. We also discuss the application of the attenuated strains, including the production of vaccinated seedlings.<\/jats:p>","DOI":"10.3390\/v16040517","type":"journal-article","created":{"date-parts":[[2024,3,27]],"date-time":"2024-03-27T14:14:09Z","timestamp":1711548849000},"page":"517","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Development and Application of Attenuated Plant Viruses as Biological Control Agents in Japan"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6914-4016","authenticated-orcid":false,"given":"Yasuhiro","family":"Tomitaka","sequence":"first","affiliation":[{"name":"Institute for Plant Protection, National Agricultural Research Organization (NARO), 2-1-18, Kannondai, Tsukuba 305-8666, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshifumi","family":"Shimomoto","sequence":"additional","affiliation":[{"name":"Kochi Agricultural Research Center, 1100 Hataeda, Nankoku 783-0023, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo-Song","family":"Ryang","sequence":"additional","affiliation":[{"name":"Kyoto Biken Laboratories, Inc., 16 Nijushi, Makishima, Uji 611-0041, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazusa","family":"Hayashi","sequence":"additional","affiliation":[{"name":"Kochi Agricultural Research Center, 1100 Hataeda, Nankoku 783-0023, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomoka","family":"Oki","sequence":"additional","affiliation":[{"name":"Kochi Agricultural Research Center, 1100 Hataeda, Nankoku 783-0023, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Momoko","family":"Matsuyama","sequence":"additional","affiliation":[{"name":"Institute for Plant Protection, National Agricultural Research Organization (NARO), 2-1-18, Kannondai, Tsukuba 305-8666, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8210-406X","authenticated-orcid":false,"given":"Ken-Taro","family":"Sekine","sequence":"additional","affiliation":[{"name":"Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nakagashiragun, Nishihara 611-0041, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,3,27]]},"reference":[{"key":"ref_1","first-page":"557","article-title":"Mosaic diseases in the Canary Islands, West Africa, and Gibraltar","volume":"39","author":"Mckinney","year":"1929","journal-title":"J. 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