Virus-Host Interactions

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<strong>Virus</strong>es• Infectious pathogens• Non-cellular• Not active outside the cell• Obligate parasites– Small piece of nucleic acids surrounded by aprotein coat– Depend on host’s machinery to reproduce• Infect all types of living organisms, butmost infect only one type of host
History• 1882- Adolf Mayer:Transmission of tobacco mosaicdisease by plant extract– Infectious agent could not beisolated• 1892- Dimitri Ivanofsky:Causative agent of tobacco isnot retained by filters– Cannot be cultivated in vitro• 1898 Martinus Beijerinck:Causative agent can becultivated in live tissue
Page 1: Virus-Host InteractionsM. Elena Gar
Page 5 and 6: Plant viruses• Two protein shell
Page 7 and 8: Virus Types• Helical- the NA is h
Page 9 and 10: Genome Types• dsDNA- Pararetrovir
Page 11 and 12: Plant Viruses- General• Approxima
Page 14 and 15: Transmission of Plant Viruses• Se
Page 16 and 17: • Viron enters cytoplasm passivel
Page 18: The replication cycle of Tobacco mo
Page 22 and 23: Morphological Symptoms• Symptoms
Page 24: ChlorosisPeanut mottle virus in bea
Page 27 and 28: Necrosis• Hypersensitive response
Page 29 and 30: Plant ResistanceResistance differen
Page 31 and 32: Plant-Virus InteractionsPlants poss
Page 33 and 34: Chlorosis• Symptoms associated wi
Page 35 and 36: Hypersensitive Response• Synthesi
Page 37 and 38: Systemic AcquiredResistance (SAR)
Page 39 and 40: • Plant Immune Responses Against

Virus-Host Interactions

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