| interaction between the new world begomovirus euphorbia yellow mosaic virus and its associated alphasatellite: effects on infection and transmission by the whitefly bemisia tabaci. | the majority of old world monopartite begomoviruses (family geminiviridae) are associated with satellite dnas. alphasatellites are capable of autonomous replication, but depend on the helper virus for movement, encapsidation and transmission by the insect vector. recently, euphorbia yellow mosaic alphasatellite (euyma) was found in association with euphorbia yellow mosaic virus (euymv) infecting euphorbia heterophylla plants in brazil. the geographical range of euyma was assessed in a representa ... | 2017 | 28590236 |
| genetic variability and population structure of the new world begomovirus euphorbia yellow mosaic virus. | the emergence of begomoviruses (whitefly-transmitted viruses classified in the genus begomovirus, family geminiviridae) in brazil probably occurred by horizontal transfer from non-cultivated plants after the introduction of bemisia tabaci meam1. the centre of diversity of euphorbia heterophylla (euphorbiaceae) is located in brazil and paraguay, where it is an invasive species in soybean and other crops. reports of possible begomovirus infection of e. heterophylla in brazil date back to the 1950s ... | 2017 | 28612702 |
| ku80, a key factor for non-homologous end-joining, retards geminivirus multiplication. | ku80 is well-known as a key component of the non-homologous end-joining pathway used to repair dna double-strand breaks. in addition, the ku80-containing dna-dependent protein kinase complex in mammals can act as a cytoplasmic sensor for viral dna to activate innate immune response. we have now, to our knowledge for the first time, demonstrated that the speed of a systemic infection with a plant dna geminivirus in arabidopsis thaliana is ku80-dependent. the early emergence of euphorbia yellow mo ... | 2015 | 26297035 |
| the contribution of translesion synthesis polymerases on geminiviral replication. | geminiviruses multiply primarily in the plant phloem, but never in meristems. their rep protein can activate dna synthesis in differentiated cells. however, when their single-stranded dna is injected into the phloem by insects, no rep is present for inducing initial complementary strand replication. considering a contribution of translesion synthesis (tls) polymerases in plants, four of them (polη, polζ, polκ, rev1) are highly and constitutively expressed in differentiated tissues like the phloe ... | 2016 | 26638018 |
| the recombination mediator rad51d promotes geminiviral infection. | to study a possible role for homologous recombination in geminivirus replication, we challenged arabidopsis recombination gene knockouts by euphorbia yellow mosaic virus infection. our results show that the rad51 paralog rad51d, rather than rad51 itself, promotes viral replication at early stages of infection. blot hybridization analyses of replicative intermediates using one- and two-dimensional gels and deep sequencing point to an unexpected facet of recombination-dependent replication, the re ... | 2016 | 27018825 |
| a study of weeds as potential inoculum sources for a tomato-infecting begomovirus in central brazil. | tomato severe rugose virus (tosrv) is the most important begomovirus species in brazilian tomato production. many weeds are associated with tomato, and some are hosts of begomoviruses. only one species of weed, nicandra physaloides, has been found to be infected with tosrv. in this study, four weed species were investigated for their capacity to be infected by tosrv and serve as a potential source of inoculum for tomato. begomoviruses from naturally infected crotalaria spp., euphorbia heterophyl ... | 2013 | 23489523 |
| rad54 is not essential for any geminiviral replication mode in planta. | the circular single-stranded dna of phytopathogenic geminiviruses is propagated by three modes: complementary strand replication (csr), rolling circle replication (rcr) and recombination-dependent replication (rdr), which need host plant factors to be carried out. in addition to necessary host polymerases, proteins of the homologous recombination repair pathway may be considered essential, since geminiviruses are particularly prone to recombination. among several others, rad54 was suggested to b ... | 2015 | 25492528 |
| molecular and biological characterization of a new brazilian begomovirus, euphorbia yellow mosaic virus (euymv), infecting euphorbia heterophylla plants. | to date, no begomovirus has been fully characterized from euphorbia heterophylla, a widely distributed weed, in brazil. here, we show the occurrence of a new begomovirus on e. heterophylla plants showing bright yellow mosaic. the bipartite viral genome was cloned from 10 samples, and all clones are almost identical to each other (95.6-98.8% nucleotide sequence identity). the dna-a sequences shared a maximum nucleotide sequence identity of 87.3% with euphorbia mosaic peru virus (eumpv) and thus w ... | 2011 | 21779908 |