Title
Tobamoviruses of two new species trigger resistance in pepper plants harbouring functional L alleles
Date Issued
01 January 2021
Access level
open access
Resource Type
journal article
Author(s)
Vélez-Olmedo J.B.
Melo F.L.
Nagata T.
de Oliveira A.S.
Resende R.O.
Publisher(s)
Microbiology Society
Abstract
Tobamoviruses are often referred to as the most notorious viral pathogens of pepper crops. These viruses are not transmitted by invertebrate vectors, but rather by physical contact and seeds. In this study, pepper plants displaying mild mottle and mosaic symptoms were sampled in four different regions of Peru. Upon double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) tests, seven samples cross-reacted weakly with antibodies against pepper mild mottle virus (PMMoV), suggesting the presence of tobamoviruses. When employing RT-PCR, conserved primers amplified cDNA fragments of viruses from two putative new tobamovirus species in the samples. The complete genome of two representative isolates were, therefore, sequenced and analysed in silico. These viruses, which were tentatively named yellow pepper mild mottle virus (YPMMoV) and chilli pepper mild mottle virus (CPMMoV), shared highest nucleotide genome sequence identities of 83 and 85% with bell pepper mottle virus (BpeMV), respectively. Mechanical inoculation of indicator plants with YPMMoV and CPMMoV isolates did not show any obvious differences in host ranges. These viruses were also inoculated mechanically on pepper plants harbouring different resistance L alleles to determine their pathotypes. Pepper plants carrying unfunctional L alleles (L0) to tobamoviruses were infected by all isolates and presented differential symptomatology for YPMMoV and CPMMoV. On the other hand, pepper plants carrying L1, L2, L3 and L4 alleles were resistant to all isolates, indicating that these viruses belong to pathotype P0
Volume
102
Issue
2
Language
English
OCDE Knowledge area
Protección y nutrición de las plantas
Scopus EID
2-s2.0-85101615037
PubMed ID
Source
Journal of General Virology
ISSN of the container
00221317
Sponsor(s)
We would like to acknowledge financial support from Brazilian Government agencies: Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Apoio à Pesquisa do Distrito Federal (FAP-DF) and Secretaria de Educación Superior, Ciencia, Tecnología e Innovación – SENESCYT. We would like to acknowledge Roger Torres for helping with sample collection and ELISA.
Sources of information: Directorio de Producción Científica Scopus