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Viruses 2019, 11(4), 316; https://doi.org/10.3390/v11040316

Infectious Virions of Bombyx Mori Latent Virus Are Incorporated into Bombyx Mori Nucleopolyhedrovirus Occlusion Bodies

1
Department of Agrobiology and Bioresources, School of Agriculture, Utsunomiya university, Utsunomiya, Tochigi 321-8505, Japan
2
Department of Biological Production Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
3
Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
4
Institute of Sericulture, Ami, Ibaraki 300-0324, Japan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 8 March 2019 / Revised: 27 March 2019 / Accepted: 28 March 2019 / Published: 1 April 2019
(This article belongs to the Section Insect Viruses)
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Abstract

The Bombyx mori latent virus (BmLV) belongs to the unassigned plant virus family Tymoviridae and contains a positive-sense, single-stranded RNA genome. BmLV has infected almost all B. mori-derived cultured cell lines through unknown routes. The source of BmLV infection and the BmLV life cycle are still unknown. Here, we examined the interaction between BmLV and the insect DNA virus Bombyx mori nucleopolyhedrovirus (BmNPV). Persistent infection with BmLV caused a slight delay in BmNPV propagation, and BmLV propagation was enhanced in B. mori larvae via co-infection with BmNPV. We also showed that BmLV infectious virions were co-occluded with BmNPV virions into BmNPV occlusion bodies. We propose a new relationship between BmLV and BmNPV. View Full-Text
Keywords: Bombyx mori latent virus; nucleopolyhedrovirus; baculovirus; occlusion body; silkworm; persistent infection; Tymoviridae; BmLV; maculavirus; Bombyx mori macula-like virus Bombyx mori latent virus; nucleopolyhedrovirus; baculovirus; occlusion body; silkworm; persistent infection; Tymoviridae; BmLV; maculavirus; Bombyx mori macula-like virus
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Tsukui, K.; Yagisawa, C.; Fujimoto, S.; Ogawa, M.; Kokusho, R.; Nozawa, M.; Kawasaki, H.; Katsuma, S.; Iwanaga, M. Infectious Virions of Bombyx Mori Latent Virus Are Incorporated into Bombyx Mori Nucleopolyhedrovirus Occlusion Bodies. Viruses 2019, 11, 316.

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