By David G. A. Walkey (auth.)
For the prior two decades i've got labored as an utilized plant virologist, trying to determine and keep watch over virus illnesses in box vegetation. over the past ten years it's been my privilege to offer brief classes in plant virology to final-year scholars learning plant pathology, micro biology and basic botany. in the course of the interval i've been lecturing, it's been attainable to suggest numerous very good 'library' books for additional studying in plant virology, yet there was no ebook overlaying utilized plant virology pupil may possibly reflect on paying for. With educating specifications in brain this e-book has been written to supply a concise creation to utilized plant virology according to the reports i've got received engaged on virus illnesses, either in an utilized laboratory and within the box. The textual content concentrates on introducing the reader to elements of plant virology that will be encountered each day by way of an utilized virologist attempting to establish viruses and strengthen keep watch over measures for virus illnesses of crop crops. even if a quick creation to virus constitution and its terminology is given within the commencing bankruptcy of the booklet, no test is made to hide intimately the extra basic features of virus constitution, biochemistry and replication. equally, the indicators brought on by person viruses usually are not defined, even supposing a few of the sorts of indicators that plant viruses reason and that can be encountered by way of a pupil or learn employee are described.
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Additional info for Applied Plant Virology
Group members have thin (3 nm wide) coiled, flexuous filamentous particles measuring 950-1350 nm. The filaments have secondary coils which give a total width of8 nm. The ss-RNA genome is multipartite, consisting of 4 or 5 parts. Natural transmission is by planthopper species belonging to the Delphacidae. Transmission is persistent, the virus is retained through moults and is also transmitted through the eggs. Group members are not generally sap-transmitted. ) RSV occurs in rice growing areas of Asia and the USSR.
Key references: Murant and Mayo (1982); Francki (1985). This group has not yet been approved by the ICTV. 40 Plant Virus Classification Sobemovirus Group Type member: southern bean mosaic virus (SBMV, 57; 274). R/1 : l. 5/21 : SIS: SIC1, Se. Name derived frotn southern bean mosaic. Group members have monopartite, ss-RNA genomes with isometric particles approximately 28 nm in diameter. They have a restricted host range and may be seed-transmitted. They are also transmitted by sap inocula tion and beetles (Sehgal, 1981).
They contain a single molecular species ofss-RNA. 2). 7). Other members of the group are cucumber green mottle mosaic (154), frangipani mosaic (196), odontoglossum ringspot (155), pepper mild mottle (330), ribgrass mosaic (152), sunn-hemp mosaic (153) and tomato mosaic virus (156). Possible members include chara australis, hypochoeris mosaic (273) and nicotiana velutina mosaic (189). Key riferences: Gibbs (1987); van Regenmortel (1981); van Regenmortel and Fraenkel-Conrat (1986). Tobravirus Group Type member: tobacco rattle virus (TRV, 12).