نتایج جستجو برای: beet yellows virus
تعداد نتایج: 402783 فیلتر نتایج به سال:
A cytochemical and electron microscope study has been made of leaves of sugar beet infected with beet yellows virus. Inclusions of particles, which agree in size with beet yellows virus particles isolated by other investigators, have been localized in the ground cytoplasm, in the chloroplasts, and in the nuclei. These particles are circa 100 A in diameter and have an electron-transparent core o...
Surveys of yellowing viruses in plastic tunnels and in open field crops of melon (Cucumis melo cultivar catalupo), oriental melon (C. melo cultivar oriental melon), and cucumber (C. sativus) were carried out in two melon-growing areas in 2014, Korea. Severe yellowing symptoms on older leaves of melon and chlorotic spots on younger leaves of melon were observed in the plastic tunnels. The sympto...
In Europe the most devastating phytoplasma associated with grapevine yellows (GY) diseases is a quarantine pest, flavescence dorée (FDp), from the 16SrV taxonomic group. The on-site detection of FDp with an affordable device would contribute to faster and more efficient decisions on the control measures for FDp. Therefore, a real-time isothermal LAMP assay for detection of FDp was validated acc...
Representative amino acid sequences of the RNA-dependent RNA polymerases of all groups of positive-strand RNA viruses were aligned hierarchiacally, starting with the most closely related ones. This resulted in delineation of three large supergroups. Within each of the supergroups, the sequences of segments of approximately 300 amino acid residues originating from the central and/or C-terminal p...
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