ENPP1 and infection: The P. nicotianae necrosis-inducing Phytophthora protein 1 (NPP1) has been associated with the induction of necrosis in parsley and A. thaliana (Fellbrich et al., 2002), and a significant up-regulation of NPP1-encoding genes was reported for P. nicotianae during the infection of Citrus sunki and Poncirus trifoliata (Dalio et al., 2018).