title: Comparative proteomic analysis of hemolymph from uninfected and Candidatus Liberibacter asiaticus-infected Diaphorina citri.
abstract: Hemolymph was characterized from Diaphorina citri adults infected with the phytopathogen, Candidatus Liberibacter asiaticus (CLas), and compared with that from uninfected psyllids. This study identified 5531 and 3220 peptides within infected and uninfected hemolymph using nano-LC-MS/MS. A reduced number of proteins were detected for D. citri and all known endosymbionts within infected hemolymph as compared to uninfected hemolymph. A large number of immune defense proteins were absent from D. citri hemolymph; however, a single recognition protein (PGRP), two serine protease inhibitors, three prophenoloxidase (proPO) enzymes, and a single serine protease in an uninfected D. citri were detected. The hemolymph is nearly devoid of nutrient storage proteins. This is the first proteomic analysis of D. citri hemolymph that also analyses the components contributed by all the endosymbionts. By comparing the contribution of each endosymbiont (CCR, CPA, and WB) in the presence and absence of CLas infection, this study offers initial insights regarding the hemolymph response to microbial community shifts associated with D. citri infection status. Our data also present potential protein targets for analysis and disruption of CLas transmission that may facilitate management of huanglongbing (HLB) caused by CLas in citrus.
authors.affiliation: Department of Entomology and Nematology, Citrus Research and Education Center, University of Florida, Lake Alfred, USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Gill
authors.affiliation: Department of Entomology and Nematology, Citrus Research and Education Center, University of Florida, Lake Alfred, USA.
authors.forename: C
authors.initials: C
authors.lastname: Chu
authors.affiliation: Department of Entomology and Nematology, Citrus Research and Education Center, University of Florida, Lake Alfred, USA. pelzstelinski@ufl.edu.
authors.forename: K S
authors.initials: KS
authors.lastname: Pelz-Stelinski
mesh_terms: D000818:Animals; D006430:Hemiptera / Q000382:microbiology*; D006458:Hemolymph / Q000378:metabolism* / Q000382:microbiology; D054884:Host-Pathogen Interactions; D019476:Insect Proteins / Q000032:analysis* / Q000378:metabolism; D040901:Proteomics / Q000379:methods*; D012230:Rhizobiaceae / Q000472:pathogenicity*; D013559:Symbiosis; D020577:Wolbachia / Q000378:metabolism
chemical_list: D019476:Insect Proteins
keywords: Citrus greening; Liberibacter; Pathogen transmission; Symbiont