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Bean Common Mosaic Virus (bean + common_mosaic_virus)
Selected AbstractsIdentification and Characterization of a Potyvirus Isolated from Siratro PlantsJOURNAL OF PHYTOPATHOLOGY, Issue 4 2008L. J. Regatieri Abstract The present work describes the identification and characterization of a potyvirus isolated from siratro (Macroptilium atropurpureum Urb.) in the north-west region of the State of São Paulo, Brazil. The virus was transmitted by mechanical inoculation. Its host range was restricted mainly to members of the Fabaceae. A cDNA fragment of about 930 bp was amplified by RT/PCR, cloned and sequenced. The fragment, which included the coat protein gene, had amino acid identity percentages between 88 and 98% with isolates of Bean common mosaic virus (BCMV). Phylogenetic analysis grouped the siratro potyvirus and BCMV isolates in 99% of the replicates, including Azuki mosaic virus, Dendrobium mosaic virus, Blackeye cowpea mosaic virus and Peanut stripe virus, which have been classified as BCMV strains. This is the first citation on the presence of BCMV in siratro plants in Brazil. [source] First report of Bean common mosaic virus in Western AustraliaPLANT PATHOLOGY, Issue 4 2005M. Saqib No abstract is available for this article. [source] Patterns of accumulation of Bean common mosaic virus in Phaseolus vulgaris genotypes nearly isogenic for the I locusANNALS OF APPLIED BIOLOGY, Issue 3 2006M.M. Cadle-Davidson Abstract The I locus of Phaseolus vulgaris is genetically and phenotypically well described, conferring incompletely dominant, temperature-dependent resistance against viruses currently assigned to at least four Potyvirus species. Despite the fact that the resistance allele at this locus, the I gene, has been incorporated into nearly all bean germplasm worldwide, little is known regarding its resistance mechanism. In the present study, P. vulgaris lines nearly isogenic for I were challenged with Bean common mosaic virus (BCMV; genus Potyvirus) in order to investigate at the cellular level the temperature-dependent resistance reaction. Immunolocalisation and confocal laser scanning microscopy were employed to visualise the virus and to identify patterns of BCMV accumulation in resistant, susceptible and heterozygous genotypes. Virus was detected in all three genotypes regardless of temperature, supporting previous findings that BCMV accumulates in protoplasts containing the I allele. Genotype-specific and temperature-specific patterns of virus accumulation suggested a resistance mechanism that depends on host recognition of viral replication and/or local movement. [source] Rhizobacteria-mediated resistance against the blackeye cowpea mosaic strain of bean common mosaic virus in cowpea (Vigna unguiculata)PEST MANAGEMENT SCIENCE (FORMERLY: PESTICIDE SCIENCE), Issue 10 2009Arakere Chunchegowda Udaya Shankar Abstract BACKGROUND: The present study investigated the effect of seven Bacillus -species plant-growth-promoting rhizobacteria (PGPR) seed treatments on the induction of disease resistance in cowpea against mosaic disease caused by the blackeye cowpea mosaic strain of bean common mosaic virus (BCMV). RESULTS: Initially, although all PGPR strains recorded significant enhancement of seed germination and seedling vigour, GBO3 and T4 strains were very promising. In general, all strains gave reduced BCMV incidence compared with the non-bacterised control, both under screen-house and under field conditions. Cowpea seeds treated with Bacillus pumilus (T4) and Bacillus subtilis (GBO3) strains offered protection of 42 and 41% against BCMV under screen-house conditions. Under field conditions, strain GBO3 offered 34% protection against BCMV. The protection offered by PGPR strains against BCMV was evaluated by indirect enzyme-linked immunosorbent assay (ELISA), with lowest immunoreactive values recorded in cowpea seeds treated with strains GBO3 and T4 in comparison with the non-bacterised control. In addition, it was observed that strain combination worked better in inducing resistance than individual strains. Cowpea seeds treated with a combination of strains GBO3 + T4 registered the highest protection against BCMV. CONCLUSION: PGPR strains were effective in protecting cowpea plants against BCMV under both screen-house and field conditions by inducing resistance against the virus. Thus, it is proposed that PGPR strains, particularly GBO3, could be potential inducers against BCMV and growth enhancers in cowpea. Copyright © 2009 Society of Chemical Industry [source] | ||||||||||