“…Since then, many FPPS genes have been identified in other insects, including aphid species (Cusson et al ., 2006; Sen et al ., 2007; Lewis et al ., 2008; Taban et al ., 2009; Bomtorin et al ., 2014; Huang et al ., 2015). In our laboratory, we have worked on aphid FPPS genes for many years, including MpFPPS1 and MpFPPS2 in M. persicae (Zhang & Li, 2008, 2012), AgFPPS in the cotton aphid Aphis gossypii (Ma et al ., 2010; Zhang & Li, 2013, 2014; Sun & Li, 2017) and RpFPPS1 and RpFPPS2 in the bird cherry-oat aphid Rhopalosiphum padi (Sun & Li, 2012). In vitro analysis of enzymatic activity with recombinant proteins showed that aphid FPPSs displayed dual geranyl/FPPS activity, and a linked enzymatic assay using the aphid FPPS and peppermint sesquiterpene synthase produced EβF (Lewis et al ., 2008), indicating the potential involvement of aphid FPPS in the biosynthesis of alarm pheromone.…”