1887

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 . 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 alleles to determine their pathotypes. Pepper plants carrying unfunctional alleles ( ) to tobamoviruses were infected by all isolates and presented differential symptomatology for YPMMoV and CPMMoV. On the other hand, pepper plants carrying , , and alleles were resistant to all isolates, indicating that these viruses belong to pathotype P.

Keyword(s): YPMMoV , pathotype , CPMMoV , tobamovirus and pepper
Funding
This study was supported by the:
  • JeffersonB. Vélez-Olmedo , Secretaría de Educación Superior, Ciencia, Tecnología e Innovación
  • RenatoO. Resende , Fundação de Apoio à Pesquisa do Distrito Federal
  • RenatoO. Resende , Conselho Nacional de Desenvolvimento Científico e Tecnológico
  • RenatoO. Resende , Conselho Nacional de Desenvolvimento Científico e Tecnológico
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/content/journal/jgv/10.1099/jgv.0.001524
2020-11-19
2020-12-04
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