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The complete genomic sequence of a new virus from cherry trees was determined. Its genome is 5857 nt long and resembles that of members of the genus Luteovirus in its genomic organization and nucleotide sequence. Based on the species demarcation criteria for luteoviruses, the virus represents a new luteovirus species. Furthermore, a 47-nt-long inverted(More)
Daphne shrubs with light green rings and mosaic on leaves contained flexuous filamentous virions (696 × 13 nm) and cylindrical inclusions typical of the subdivision III of Edwardson’s classification for inclusions induced by members of the family Potyviridae. Decoration tests using antisera to 67 potyviruses revealed distant serological relations among(More)
Visual inspections of elm trees in south Moravia in 1997–2007 revealed a rare occurrence of plants with smaller and cowl-forming leaves on some twigs, i.e. a feature resembling witches’-broom disease observed on the end of twigs. The presence of phytoplasma-like bodies was observed by transmission electron microscopy of phloem tissue. On the other hand, no(More)
Since 1938, when the first observation of a virus-like disease in daphne was recorded [4], about 15 different viruses have been found in different Daphne species. Among them, two potyviruses have been detected: daphne Y virus in New Zealand, with a particle length of 733 nm [7], and a second virus, also named daphne Y virus, in Germany, with particles of(More)
BACKGROUND There is a lack of published evidence on the importance of methotrexate (MTX) dose and route of administration on both its efficacy and adverse events in children with Juvenile Idiopathic Arthritis (JIA). We aimed to document our clinical practice based on the treat-to-target approach in order to support the concept that better therapeutic effect(More)
Lilium spp. with symptoms of severe fasciation were observed in Southern and central Bohemia during the period 1999-2003. Nucleic acids extracted from symptomatic and asymptomatic plants were used in nested-PCR assays with primers amplifying 16S-23S rRNA sequences specific for phytoplasmas. The subsequent nested-PCR with phytoplasma group-specific primers(More)
In several European countries apple trees are affected by apple proliferation disease, which is usually associated with the presence of ‘Candidatus Phytoplasma mali’. During 2010, samples from several apple trees displaying proliferation symptoms were collected throughout the Czech Republic to verify identity of phytoplasmas detected in association with the(More)
Echinacea purpurea plants showing yellowing/reddening and phyllody symptoms were observed in southern Bohemia. Transmission electron microscopy observations showed phytoplasmas in sieve cells of symptomatic plants, but not in healthy ones. Direct and nested polymerase chain reaction with phytoplasma specific primers and subsequent restriction fragment(More)
Strawberry virus diseases were monitored using a leaf graft bioassay in 17 cultivars of strawberry Fragaria ananassa Duchesne in the Czech Republic. Fragaria vesca indicator clones revealed after grafting several symptoms of strawberry mottle, crinkle, vein banding, and mild yellow edge as well as of mixed virus infections. Isometric virus-like particles(More)
Morphology of pollen grains collected from healthy and virus infected plants ofChenopodium quinoa L.,Chenopodium album L. andNicotiana tabacum L. cv. Samsun was investigated using scanning electron microscopy (SEM). Pollen grains from tobacco plans infected with tobacco mosaic virus (TMV) were smaller, with rounded shape and conspicuous deformation of(More)