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© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

A novel double-stranded RNA (dsRNA) virus was isolated and described from strain ZZZ210557 of plant endophyte Allocryptovalsa sichuanensis. The dsRNA virus contains four dsRNA segments, dsRNA1 to dsRNA4, with a size range of 3.8 to 5.1 kbp. Each possesses a single large ORF and is encapsulated in isometric particles approximately 42–47 nm in diameter. Notably, the dsRNA3 encoded sequence revealed modest similarities to the amino acid sequences of RdRps predicted from the nucleotide sequences of known and suspected members of the family Quadriviridae. Phylogenetic analysis of the putative RdRp with the corresponding proteins of other quadriviruses revealed that the dsRNA virus is a new member belonging to the family Quadriviridae, tentatively named Allocryptovalsa sichuanensis quadrivirus 1 (AsQV1). All four segments of AsQV1 could be successfully cured through ribavirin treatment, whereas it likely has no apparent impact on the morphologies or virulence of the host fungus. This study is the first report of a quadrivirus isolated from the fungus A. sichuanensis, and our results enhance the diversity of the quadrivirus.

Details

Title
Identification, Molecular Characterization, and Biology of a Novel Quadrivirus Infecting the Plant Fungus Allocryptovalsa sichuanensis
Author
Xie, Yuxu 1 ; Wang, Xianhong 2 ; Sun, Xiuyuan 1 ; Ren, Fanxing 1 ; Zhang, Meng 1   VIAFID ORCID Logo  ; Xu, Chao 1 ; Ma, Qingzhou 1 ; Geng, Yuehua 1 ; Zang, Rui 1 ; Guo, Yashuang 1 

 College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China; [email protected] (Y.X.); [email protected] (X.S.); [email protected] (F.R.); [email protected] (M.Z.); [email protected] (C.X.); [email protected] (Q.M.); [email protected] (Y.G.); [email protected] (R.Z.) 
 Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; [email protected] 
First page
275
Publication year
2025
Publication date
2025
Publisher
MDPI AG
e-ISSN
19994915
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3171249718
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.