Figure 1

Ornithine and polyamine biosynthesis pathway. The principle pathway of ornithine and polyamine biosynthesis is shown along with a summary of key findings from the current study. Change in abundance of transcripts in susceptible wheat plants is indicated by solid triangles and in virulent Hessian fly larvae as open triangles, compared to controls. Triangles pointing up or down indicate increase or decrease, respectively, in transcript abundance quantified by RT-qPCR. Solid circles indicate transcripts that are either transiently expressed in only one time-point or do not differ significantly from control levels in wheat tissue. Solid block-style arrows indicate polyamine levels in susceptible wheat plants and open block-style arrows indicate polyamine levels in virulent Hessian fly larvae. Arrows pointing up indicate increased levels of polyamines in infested tissue compared to uninfested controls or in virulent larvae compared to avirulent larvae.