This study provides further insight into the molecular events during compatible and incompatible interactions between viruses and host plants.
On the other hand, C/N shift towards nitrogen, during compatible interaction (Ref 7), favors maggot growth by promoting formation of nutritive tissue (Ref 8).
Up-regulation of genes involved in cell cycle and organization during compatible interaction (Ref 9) also promotes establishment of nutritive tissue at feeding sites (Ref 10).
In order to identify molecular signatures during compatible interactions, genome wide transcriptional profiling was performed using SSH library and microarray technology.
Similarly, genes involved in chromatin remodeling and maintenance were observed to be over-expressed at late stages of giant cell formation in plants during compatible interaction with root-knot nematodes (Portillo et al. 2013).
Several genes related to cell organization and DNA synthesis were also found to be up-regulated in the rice host during compatible interactions with gall midge (Rawat et al. 2012b).
The dramatic C/N ratio shift in plants during compatible interactions might be a necessity for the insect growth and development and, therefore, for host plant susceptibility (Harris et al. 2006).
The greater stress response during compatible interactions may be a reflection of greater stress, not threat, on the susceptible plant by the virulent larva (Anderson and Harris. 2006; Harris et al. 2006; O'Donnell et al. 2003; Woodward and Bartel. 2005).
This is in contrast to earlier observations made for the Hessian fly-wheat interaction by Zhu et al. (2008) where a more dramatic C/N shift towards nitrogen in the host was observed during compatible interaction as compared to incompatible interaction with the pest.
In this study, we have examined the molecular events occurring in both pollen and style during compatible and incompatible crosses.
However, our results identify changes in stylar gene expression that clearly precede these morphological changes during compatible pollinations.
