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Wheat Dwarf Virus
Wheat dwarf virus (WDV) is a plant pathogenic virus in the family ''Geminiviridae''. The two isolates of WDV affect wheat and barley. It is spread by the leafhopper ''Psammotettix alienus''. Hosts and symptoms There are two main types of strains of WDV, which can be distinguished by their host preference for either wheat (''Triticum aestivum'') or barley (''Hordeum vulgare''). WDV can cause a range of symptoms in their host plant that are both localized and systemic. For example, the growth of the plant can be stunted, appearing bush-like. The plant can have fewer tiller (botany), tillers (stems produced by grass) and leaves than normally observed. Small parts of the leaf may also be affected by chlorosis, which can eventually take over the entire leaf. The number of spikes on the plant may be reduced or existing ones may be stunted. WDV vector (epidemiology), is transmitted by leafhoppers, which suck phloem sap from the vegetative sections of wheat with their mouthparts, passin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Pathogenic Virus
Plant viruses are viruses that have the potential to affect plants. Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host. Plant viruses can be pathogenic to vascular plants ("higher plants"). Many plant viruses are rod-shaped, with protein discs forming a tube surrounding the viral genome; isometric particles are another common structure. They rarely have an envelope. The great majority have an RNA genome, which is usually small and single stranded (ss), but some viruses have double-stranded (ds) RNA, ssDNA or dsDNA genomes. Although plant viruses are not as well understood as their animal counterparts, one plant virus has become very recognizable: ''tobacco mosaic virus'' (TMV), the first virus to be discovered. This and other viruses cause an estimated US$60 billion loss in crop yields worldwide each year. Plant viruses are grouped into 73 genera and 49 families. However, these figures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
