Fig. 7From: Long-term, sustained feeding by Asian citrus psyllid disrupts salicylic acid homeostasis in sweet orangeModels associated with Diaphorina citri feeding and plant immune response in leaves of Citrus sinensis. Hypothetical molecular mechanisms involved in transcriptional regulation of SA modification and activation of defense-associated responses via NPR1 in C. sinensis. a Model of plant immune response to short-term D. citri feeding. b Model of plant immune response to long-term D. citri feeding. Abbreviations are similar to Fig. 1; black line arrows indicate synthesis of SA metabolites. Dashed lines indicate transport to vacuole; thick, white arrows indicate the Isochorismate (IC) Phenylalanine ammonia-lyase pathways; thick, gray arrows indicate the reduction and monomerization of NPR1; thick, orange arrows indicate upregulation of genes and thick, blue arrows indicate the increase in SA and its metabolites in leaves. (=PR-1) represents no changes in transcriptional regulationBack to article page