1. Plant is immune, no or limited viral replication occurs, no cell‐to‐cell
movement.
2. Virus replicates and moves through out the plant without obvious symptoms
evident – latent (tolerance)
3. Virus replicates and causes symptoms in new leaves but with time and further
plant growth symptoms disappear ‐ plant recovers
4. Virus replicates but the plant limits the virus movement by hypersensitive
response ‐ cell death (may not always be noticed; necrosis, local lesions)
5. Virus replicates and moves through out the plant with obvious symptoms