Proteomic analysis of TMV and TMV 24A+UPD infected N. benthamiana plants by iTRAQ reveal differences in stress signalling, cell death and response to intracellular iron

TMV was mutated by introducing different lengths of internal poly (A) tract in front of the upstream pseudo knotted domain .Twenty four nucleotides were inserted into the TMV genome, this mutant is designated TMV 24A +UPD TMV 24+UPD shows more severe leaf necrosis and stem collapse, leading to plant death within a few days. The difference in rate of virus replication and plant death may be because the poly (A) tract introduced into TMV may interact with UPD and affect its interaction with host factors. To understand TMV 24A+UPD interaction with the host and the events leading to the altered pathogenesis, we opted to evaluate its proteome profile and compare it to TMV using Isobaric tag for relative and absolute quantitation( iTRAQ).