Abstract
Arabis mosaic virus lily and narcissus isolates (ArMV-Li and ArMV-Na) induced severe necrotic spots on Chenopodium quinoa, whereas ArMV butterbur isolate (ArMV-Bu) caused symptomless infection in the plant. The accumulation level of ArMV-Bu in upper non-inoculated leaves of C. quinoa was comparable to that of ArMV-Li or -Na. The agar gel double-diffusion test using an antiserum against ArMV-Li showed ArMV-Li was closely related to ArMV-Na, but not to ArMV-Bu. The RNAs-2 of ArMV-Li, -Na, and -Bu consist of 3707, 3709, and 3789 nucleotides, and they contain one open reading frame encoding a putative polyprotein of 1083, 1084, and 1122 amino acids, respectively. The overall identity of RNA-2 of ArMV-Li displayed more than 90% with ArMV-Na, but less than 70% with ArMV-Bu. A phylogenetic analysis of 2A sequences from ArMV isolates revealed ArMV-Bu was not categorized in any cluster. ArMV-Bu is a unique isolate from the point of view of pathological and serological features, and nucleotide sequence.
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