Ivanka Kamenova

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Sharka disease, caused by Plum pox virus (PPV) was first recorded in Bulgaria during the early twentieth century and since that first report, the disease has progressively spread throughout Europe and more recently to Asia, Africa, North and South America. Few PPV resistance genes have been found to naturally occur in Prunus and this has led to the(More)
Virus-like symptoms were recently observed on leaves of landscape and nursery downy and star jasmine (Jasminum multijlorum) and wax jasmine (J. gracile) in southeast Florida. Foliar symptoms included mottling, chlorotic ring spots and chlorotic line patterns. An agent was mechanically transmitted with difficulty from symptomatic leaves of downy jasmine to(More)
Most RNA polymerase (Pol) II promoters lack a TATA element, yet nearly all Pol II transcription requires TATA binding protein (TBP). While the TBP-TATA interaction is critical for transcription at TATA-containing promoters, it has been unclear whether TBP sequence-specific DNA contacts are required for transcription at TATA-less genes. Transcription factor(More)
A new tobamovirus species has been recently isolated from hibiscus (Hibiscus rosa-sinensis) in Florida (1). This Florida hibiscus virus has been given the name Hibiscus latent Fort Pierce virus (HLFPV) to reflect the site (Fort Pierce, FL) and host (hibiscus) from which it was originally isolated. A limited survey has revealed that this virus is widespread(More)
Tropical soda apple (Solanum viarum Dunal) is a solanaceous weed, armed with prickles on stems, leaves, petioles, and calyxes. It is native to Argentina, Brazil, Paraguay, and Uruguay (26) and was introduced in the 1980s into Florida, where it thrives as a perennial, particularly in the southern part of the state (11). It has spread rapidly throughout(More)
The genetic diversity of plum pox virus strain M (PPV-M) was assessed by analyzing 28 isolates collected in 8 European countries. Two genomic fragments spanning the (Cter)P3-6K1-(Nter)CI coding region as well as the full coat protein coding region were sequenced directly from PCR products. Phylogenetic analysis showed that the geographical origin of the(More)
Colorado potato beetle, Leptinotarsa decemlineata Say, is the most destructive insect pest of potatoes. When the population of beetles is high, plants can be completely defoliated and commercial potato production is nearly impossible without control of the beetle. The beetles have shown a tremendous ability to develop resistance against insecticides.(More)
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