Transcriptional expression levels of eight OY-M genes in insect and plant hosts. Relative quantification of rrnB, rpsJ, gyrB, PAM289, mdlB, hflB, himA, and dammRNA expression in insect and plant hosts was performed by qRT-PCR and the results were normalized against tufB. The PAM289 data graph was redrawn based on previous data (Oshima et al. 2011). The rrnB, rpsJ, gyrB, and PAM289 gene expression levels in insect hosts and the mdlB, hflB, himA, and dam gene expression levels in plant hosts were adjusted as 100%. Error bars indicate SE. * and **Significant differences of P < 0.05 and P < 0.01, respectively (Student's t-test).