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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Quantitative phosphoproteomic analysis of chitin-triggered immune responses in the plasma membrane of Arabidopsis

Lijuan Chen A , Jiahui Xiao A , Zhanhao Huang A , Qi Zhou A * and Bing Liu https://orcid.org/0000-0003-2074-9126 A *
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- Author Affiliations

A Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China.


Handling Editor: Calum Wilson

Functional Plant Biology 50(3) 219-229 https://doi.org/10.1071/FP22045
Submitted: 4 March 2022  Accepted: 25 October 2022   Published: 18 November 2022

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Plant diseases seriously damage crop production, and most plant diseases are caused by fungi. Fungal cell walls contain chitin, a highly conserved component that is widely recognised by plants as a PAMP (pathogen-associated molecular pattern) to induce defence responses. The molecular mechanisms that function downstream of chitin-triggered intracellular phosphorylation remain largely unknown. In this study, we performed quantitative phosphoproteomics analysis to study protein phosphorylation changes in the plasma membrane after chitin treatment in Arabidopsis thaliana L. seedlings. Proteins with altered phosphorylation status after chitin treatment participated in biological processes ranging from signalling, localisation, and transport, to biogenesis, processing, and metabolism, suggesting that PAMP signalling targets multiple processes to coordinate the immune response. These results provide important insights into the molecular mechanism of chitin-induced plant immunity.

Keywords: chitin, iTRAQ, pattern-triggered immunity, phosphoproteomics, plant defense mechanisms, plant immune, plant-microbe interactions, quantitative proteomics.


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