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Konjac mosaic virus Naturally Infecting Three Aroid Plant Species in Andhra Pradesh, India

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Abstract:

Abstract

The genomes of three potyvirus isolates from, respectively, naturally infected Colocasia esculenta, Caladium spp. and Dieffenbachia spp. in Andhra Pradesh, India, were amplified by RT-PCR using degenerate potyvirus primers. Sequence analysis of RT-PCR amplicons (1599 nucleotides) showed maximum identity of 97% with the KoMV-Zan isolate of Konjac mosaic virus (KoMV) from Taiwan (A/C AF332872). The three isolates had a maximum identity of 99.4%. The length of coat protein (CP) gene of three isolates was 846 nucleotides encoding 282 amino acids with a deduced size of 32.25 kDa. The CP gene of the isolates had, respectively, 78.1–95.7% and 88.2–96.4% identity at nucleotide and amino acid levels with KoMV isolates. The CP gene of the three isolates had 93.1–100% (nucleotide) and 98.2–100% (amino acid) identity. The 3′-UTR of the three isolates showed maximum identity of 91.1–100% identity between and with other KoMV isolates. In the CP amino acid–based phylogenetic analyses, the isolates branched as a distinct cluster along with known KoMV isolates. The three potyvirus isolates associated with mosaic, chlorotic feathery mottling, chlorotic spots, leaf deformation and chlorotic ring spots on three aroids were identified as isolates of KoMV for the first time from Andhra Pradesh, India.

Keywords: Andhra Pradesh; India; Konjac mosaic virus; aroids; genome analysis

Document Type: Short Communication

DOI: http://dx.doi.org/10.1111/j.1439-0434.2010.01720.x

Affiliations: 1: Authors’ addresses: Department of Virology, Sri Venkateswara University, Tirupati 517 502, Andra Pradesh, India 2: Horticultural Research Station, Andhra Pradesh Horticultural University, Kovvur 534 350, West Godavari District, Andhra Pradesh, India (correspondence to P. Sreenivasulu. ), Email: pothursree@yahoo.com

Publication date: February 1, 2011

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