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中国植物生理学会第十次会员代表大会暨全国学术年会

作者： Song Yun, Sun Daye, Guo Yi* 1Institute of Molecular and Cell Biology, Hebei Normal University, Shijiazhuang, P. R. China, 050016

＜正＞Plants have evolved sophisticated systems to cope with the adverse environmental conditions such as cold, drought and salinity due to their sessile nature. It has been reported that stress conditions have great ... 详细信息

关键词： apoplastic proteins salt stress rice 2-D DIGE

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Proteomic analysis of pathogen-responsive proteins from maize stem apoplast triggered by Fusarium verticillioides

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Journal of Integrative Agriculture 2022年第2期21卷 446-459页

作者： Hafiz ABDUL HASEEB ZHANG Jun GUO Yu-shuang GAO Mei-xu GUO Wei Institute of Food Science and Technology Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport ProcessMinistry of Agriculture and Rural AffairsBeijing 100193P.R.China Key Laboratory of Molecular Genetics China National Tobacco CorporationGuizhou Institute of Tobacco ScienceGuiyang 550081P.R.China

During the attack of a pathogen, a variety of defense-associated proteins are released by the host plant in the apoplast to impede the perceived attack. This study utilized the mass spectrometry(LC-MS/MS) and label-free quantification method to analyze the apoplastic fluid(APF) from maize stalk and identified the proteins responsive to the Fusarium verticillioides infection. We have identified 742 proteins, and among these, 119 proteins were differentially accumulated(DAPs), i.e., 35 up-regulated, 18 down-regulated, and 66 proteins were only induced by the pathogen infection. The differentially accumulated proteins were analyzed for their Gene Ontology(GO) and Kyoto Encyclopedia of Gene and Genomes(KEGG) pathway enrichment. The highly enriched Biological Process(BP) term was the L-serine biosynthesis process, whereas the most enriched Molecular Function(MF) term was the cysteine-type endopeptidase inhibitor activity. It was also found that the pathways related to the biosynthesis of amino acid, biosynthesis of secondary metabolites, protein processing in the endoplasmic reticulum, and carbohydrate metabolic pathways were significantly enriched. Moreover, 61 out of 119 differentially accumulated proteins were predicted as secretory proteins. The secretory pathways analysis showed that a greater number of proteins were secreted through the conventional secretion system compared to the unconventional secretion system. The identified secreted proteins were related to a variety of pathways in defense responses including cell redox homeostasis, cell wall modification, signal transduction, carbohydrate metabolism, binding proteins(metal ion binding, RNA binding and heme-binding), maintenance and stabilization of other proteins, indicating a complex response from the plant to the fungal infection. Our data suggested that a number of host proteins belonging to various pathways have been modulated in the apoplastic region.

关键词： apoplastic proteins maize defense response proteome Fusarium verticillioides

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