title: Unraveling the protein network of tomato fruit in response to necrotrophic phytopathogenic Rhizopus nigricans.
abstract: Plants are endowed with a sophisticated defense mechanism that gives signals to plant cells about the immediate danger from surroundings and protects them from pathogen invasion. In the search for the particular proteins involved in fruit defense responses, we report here a comparative analysis of tomato fruit (Solanum lycopersicum cv. Ailsa Craig) infected by Rhizopus nigricans Ehrenb, which is a significant contributor to postharvest rot disease in fresh tomato fruits. In total, four hundred forty-five tomato proteins were detected in common between the non-infected group and infected tomato fruit of mature green. Forty-nine differentially expressed spots in 2-D gels were identified, and were sorted into fifteen functional groups. Most of these proteins participate directly in the stress response process, while others were found to be involved in several equally important biological processes: protein metabolic process, carbohydrate metabolic process, ethylene biosynthesis, and cell death and so on. These responses occur in different cellular components, both intra- and extracellular spaces. The differentially expressed proteins were integrated into several pathways to show the regulation style existing in tomato fruit host. The composition of the collected proteins populations and the putative functions of the identified proteins argue for their roles in pathogen-plant interactions. Collectively results provide evidence that several regulatory pathways contribute to the resistance of tomato fruit to pathogen.
authors.affiliation: The College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Pan
authors.forename: Benzhong
authors.initials: B
authors.lastname: Zhu
authors.forename: Yunbo
authors.initials: Y
authors.lastname: Luo
authors.forename: Daqi
authors.initials: D
authors.lastname: Fu
mesh_terms: D005638:Fruit / Q000378:metabolism*; D018551:Solanum lycopersicum / Q000382:microbiology*; D012233:Rhizopus / Q000378:metabolism*
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