The following points highlight the eight chief methods used for the transmission of plant viruses. The methods are: 1. Seed Transmission of Virus 2. Transmission by Vegetative Propagation 3. Transmission by Mechanical Means 4. Transmission by Cuscuta 5. Soil Transmission 6. Insect Transmission 7. Transmission by Fungi 8. Some Soil Inhabiting Viruses have Nematode Vectors. Method # 1. Seed Transmission [...]
The following points highlight the life cycle of a typical plant virus such as TMV (Tobacco Mosaic Virus) which comprises of four stages. The stages are: 1. Transmission of Virus Particles (Virions) 2. Infection 3. Virus Multiplication 4. Sites of Viral RNA and Viral Protein Synthesis. Stage # 1. Transmission of Virus Particles (Virions): The rod-shaped Tobacco Mosaic Virus (TMV) [...]
The following points highlight the eight modes of transmission of plant viruses. The modes are: 1. Mechanical Transmission 2. Vegetative and Graft Transmission 3. Pollen Transmission 4. Seed Transmission 5. Nematode Transmission 6. Fungal Transmission 7. Insect Vector Transmission 8. Dodder Transmission. Mode # 1. Mechanical Transmission: In nature plant viruses are mechanically transmitted from diseased to healthy plants by [...]