Quantitative expression of putative defense and stress-related genes to PWN infestation. The quantitative expression of putative genes from the four pine samples under study was assessed by qPCR. Abundance of transcripts was normalized using the housekeeping gene 18S-rRNA. Milli-Q water was used as control and no amplification was obtained, therefore it is not represented in the figure.
Santos et al. BMC Genomics 2012 13:599 doi:10.1186/1471-2164-13-599