Vol. 16 No. 1
First report of mesta yellow vein mosaic virus infecting okra in West Bengal
Author(s): S. DAS, S. CHAKRABORTY AND J. TARAFDAR
Abstract: Bhendi Yellow Vein Mosaic Virus (BYVMV) is predominantly occurring in okra across India wherever okra is grown but in West Bengal many fields are showing this typical yellow vein mosaic symptom in combination with severe leaf yellowing, enation and curling of leaves which is creating a confusion with the infection of Mesta yellow vein mosaic virus (MYVMV) and Okra enation leaf curl viruses (OELCV). Virus isolate Krish1 was obtained from Okra showing typical yellowing symptoms in Nadia, West Bengal. The complete nucleotide sequence of DNA-A was determined, it contains 2743 bp nucleotides (MN005041), with two ORFs in virion-sense DNA and five ORFs in complementary- sense DNA. Total DNA-A and deduced amino acid sequences of individual ORFs showed that 99.59% identity with Mesta Yellow Vein Mosaic Virus, Jalgaon, Maharashtra isolate.These are actually emerging in association with yellow vein mosaic symptoms in severe form that may evolve laterly by recombination with BYVMV and OELCV which is frequently occurring in this state. Here we also detected the presence of Beta-satellite of BYVMV in okra with MYVMV in the field of Nadia district which is highly significance in suppression of host resistance. To the best of our knowledge, this is first report of Mesta yellow vein mosaic virus (MYVMV) in okra from West Bengal.
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