During survey from March 2014 to October
2015, in Barasat, West Bengal, India, incidence of symptoms suggestive of virus
infection was observed in Tabernaemontana divaricata (family
–Apocynaceae) and Albizia saman (Fabaceae). Infected plants were showing
typical symptoms of Begomovirus infection, including leaf curling, leaf
yellowing and stunted growth. The occurrences of geminivirus were confirmed by
symptomatology, southern blot analysis, Polymerase Chain Reaction (PCR) and
nucleotide analysis of the part of genome. Sequence analysis showed that the
virus from both the plants share 93-99% identity with the sequences of other
BYVMV isolates. The sequence from T. divaricata and A. saman share 99%
identity with each other at the nucleotide level showing close phylogenetic
relationship. Host range study shows that viruses from both the plants can
transfer to chilli plant through mechanically. This is the first molecular
evidence of Bhendi yellow vein mosaic virus infecting T. divaricata and
A. saman in West Bengal, India.
Viruses of the
genus Begomovirus are transmitted by the whitefly Bemisia tabaci and
are the most numerous and economically destructive viruses among the
geminiviruses. They comprise the largest numbers of species (288 of 325 total
species) in the family Geminiviridae. During the last 30 years,
begomoviruses have emerged as important viral pathogens in the field that
infect a broad variety of food, fiber, and ornamental crops and cause
significant losses worldwide. Begomoviruses have been sub-divided into two
types with either a bipartite or monopartite genome.
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