Sida chlorotic leaf virus : a new recombinant begomovirus found in non-cultivated plants and Cucumis sativus L

PeerJ

article

Daniel Alejandro García-Rodríguez¹  Brenda Lizet Partida-Palacios¹  Carlos Fernando Regla-Márquez²  Sara Centeno-Leija³  Hugo Serrano-Posada³  Bernardo Bañuelos-Hernández⁴  Yair Cárdenas-Conejo³ 

[1] Universidad de Colima, Laboratorio de Biología Sintética;Centro Nacional de Referencia Fitosanitaria, Departamento de Control Biológico;Universidad de Colima, Consejo Nacional de Ciencia y Tecnología-Laboratorio de Biología Sintética;Escuela de Veterinaria, Universidad de La Salle

关键词: Geminivirus;    Begomovirus;    Recombination;    High-Throughput Sequencing;    Food security;    Agricultural efficiency;    Weeds;    Circomics;    Virome;   

DOI  :  10.7717/peerj.15047

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundBegomoviruses are circular single-stranded DNA plant viruses that cause economic losses worldwide. Weeds have been pointed out as reservoirs for many begomoviruses species, especially from members of the Sida and Malvastrum genera. These weeds have the ability to host multiple begomoviruses species simultaneously, which can lead to the emergence of new viral species that can spread to commercial crops. Additionally, begomoviruses have a natural tendency to recombine, resulting in the emergence of new variants and species.MethodsTo explore the begomoviruses biodiversity in weeds from genera Sida and Malvastrum in Colima, México, we collected symptomatic plants from these genera throughout the state. To identify BGVs infecting weeds, we performed circular DNA genomics (circomics) using the Illumina platform. Contig annotation was conducted with the BLASTn tool using the GenBank nucleotide “nr” database. We corroborated by PCR the presence of begomoviruses in weeds samples and isolated and sequenced the complete genome of a probable new species of begomovirus using the Sanger method. The demarcation process for new species determination followed the International Committee on Taxonomy of Viruses criteria. Phylogenetic and recombination analyses were implemented to infer the evolutionary relationship of the new virus.ResultsWe identified a new begomovirus species from sida and malvastrum plants that has the ability to infect Cucumis sativus L. According to our findings, the novel species Sida chlorotic leaf virus is the result of a recombination event between one member of the group known as the Squash leaf curl virus (SLCV) clade and another from the Abutilon mosaic virus (AbMV) clade. Additionally, we isolated three previously identified begomoviruses species, two of which infected commercial crops: okra (Okra yellow mosaic Mexico virus) and cucumber (Cucumber chlorotic leaf virus).ConclusionThese findings support the idea that weeds act as begomovirus reservoirs and play essential roles in begomovirus biodiversity. Therefore, controlling their populations near commercial crops must be considered in order to avoid the harmful effects of these phytopathogens and thus increase agricultural efficiency, ensuring food and nutritional security.

【 授权许可】

CC BY