Mutations in the coat protein of a begomovirus result in altered transmission by different species of whitefly vectors
| Autor: | Yao Chi, Chao Liu, Shu-Sheng Liu, Yun-Yun Fan, Li-Long Pan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
viruses Mutant medicine.disease_cause 01 natural sciences Microbiology Virus 03 medical and health sciences Virology Plant virus Genetic variation medicine 030304 developmental biology Infectivity Genetics virus evolution 0303 health sciences Mutation biology Begomovirus food and beverages virus transmission biology.organism_classification coat protein Viral evolution insect vector genetic variation 010606 plant biology & botany Research Article |
| Zdroj: | Virus Evolution |
| ISSN: | 2057-1577 |
| Popis: | For many crop pathogens including viruses, high genetic variation provides them with potential to adapt to and prevail in a changing environment. Understanding genetic variation in viruses and their significance is a key to elaborate virus epidemiology and evolution. While genetic variation of plant viruses has been documented to impact virus–host interactions, how it affects virus–insect vector interactions remains elusive. Here, we report the impact of mutations in the coat protein of squash leaf curl China virus (SLCCNV), a begomovirus, on the interaction between the virus and its whitefly vectors. We characterized mutations in the coat protein of SLCCNV and found that some residues exhibited higher mutation frequency than the others. We assayed the impact of mutation on infectivity using agroinoculation and found these mutations marginally affect virus infectivity. We further analyze their functions using virus acquisition and transmission trials and found some of mutations resulted in altered transmission of SLCCNV by different species of the whitefly Bemisia tabaci complex. We then identified the key amino acid residue(s) involved by constructing several mutant viruses and found that a single-residue mutation in the coat protein of SLCCNV was sufficient to significantly alter the whitefly transmission characteristics of SLCCNV. We examined the competition between different genotypes of SLCCNV in plant infection and whitefly transmission. We found that mutations in the coat protein did not alter the fitness of SLCCNV in plants, but they rendered the virus more competitive in transmission by certain species of whiteflies. Our findings indicate that mutations in the coat protein may play a key role in both the adaptation of begomoviruses to the changing vector populations and the evolution of begomoviruses. |
| Databáze: | OpenAIRE |
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