Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"geminiviruses"”.
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Molecular investigations of subgroup I geminiviruses
The diversity of Subgroup I geminiviruses causing streak disease in maize, sugarcane, and indigenous wild grasses was investigated. The virus. isolates studied originated from maize (several southern African isolates), two sugarcane cultivars (from Natal province, South Africa, and from Mauritius), …
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Towards an antibody mediated resistance against Geminiviruses
In this study, single chains (scFvs) against key proteins of the Tomato leaf curl virus-India were generated using phage display and/or hybridoma technologies. Purified AV1 (coat protein) and AC1 (replicase enhancer) viral proteins were used for mice immunization and screening of phage display …
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The mechanism of component recognition of bipartite geminiviruses: Genetic studies of the replication of squash leaf curl virus, and, Genetic and functional studies of squash leaf curl virus coat protein AR1
Both genomic components of bipartite geminiviruses encode functions essential for viral infection: the A component replicates the viral genome and the B component systemically spreads the virus throughout the host. Thus, correct recognition between the two components is required to ensure a …
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The Genome of Bean Golden Mosaic Virus: Restriction Map and Use as a Probe to Sensitively Diagnose Geminivirus Infection
… is presented as a model for whitefly-transmitted geminiviruses. The twin-sphere 'geminate' particle is the unit particle and contains one molecule of circular, single-stranded (ss) DNA about 2600 bases long. Linear forms of the DNA, of unimodal size distribution and slightly shorter than the …
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Investigations of the molecular determinants of maize streak virus replication
Geminiviruses replicate via a rolling circle mechanism, which initiates at the origin of replication located within the long intergenic region (LIR). The viral replication associated-protein (Rep) in conjunction with the host's DNA replication machinery is responsible for the initiation and …
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Determination of the molecular mechanism of cell-to-cell movement in squash leaf curl geminivirus
… replicate in the cytoplasm of infected cells, geminiviruses have genomes of DNA, and must replicate in the nucleus. Thus, the nuclear membrane poses an additional barrier to cell-to-cell spread. To overcome this block, I propose that SqLCV encodes two MPs: a nuclear shuttle (BR1) to transport …
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Discovery and characterisation of viral-like sequences and viruses associated with Phytophthora pluvialis in New Zealand
… of replication initiation protein sequences of geminiviruses revealed only short spans (28 – 40 nt) that perhaps co-incidentally share sequence similarity to the mitochondrial genomes of seven Phytophthora species. A novel dsRNA virus from P. pluvialis was characterised and designated as …
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Roles and Mechanisms of H3.1K27me1 Methyltransferases in Defense Against Virus in Arabidopsis
… histone modifications to antagonize geminiviruses. Arabidopsis Trithorax-Related Protein 5 (ATXR5) and ATXR6 deposit H3K27me1 over heterochromatin, which will suppress the DNA re-replication and transposon reactivation to maintain genome stability. Here, we found that atxr5 atxr6 …
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A study of the super-abundant Bemisia tabaci (Gennadius) species complex (Hemiptera: Aleyrodidae) in cassava mosaic disease pandemic areas in Tanzania
… populations. It is the vector of cassava mosaic geminiviruses (CMGs) causing cassava mosaic (CMD) disease to cassava (Manihot esculenta Crantz). After the outbreak and spread of a severe CMD from Uganda to several East and Central African countries, the production of cassava has been impaired. …
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Molecular diversity and coat protein expression of Sweet potato leaf curl virus
Leaf curl virus diseases have been reported in sweetpotato throughout the world. One of the causal agents is Sweet potato leaf curl virus (SPLCV) which belongs to the genus Begomovirus (family Geminiviridae). In the United States, SPLCV has been found infecting an ornamental sweetpotato and several …