Volume 49, Issue 6 pp. 863-870
Free Access

Proteomic Analysis of Rice Plasma Membrane-associated Proteins in Response to Chitooligosaccharide Elicitors

Fang Chen

Fang Chen

State Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200032, China

Search for more papers by this author
Qun Li

Qun Li

State Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200032, China

Search for more papers by this author
Zuhua He

Corresponding Author

Zuhua He

State Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200032, China

*Author for correspondence. Tel: +86 (0)21 5492 4121; Fax: +86 (0)21 5492 4015; E-mail: <[email protected]>.Search for more papers by this author
First published: 15 June 2007
Citations: 12

Supported by grants from the Chinese Academy of Sciences (KSCX2-YW-007).

Publication of this paper is supported by the National Natural Science Foundation of China (30624808).

Abstract

Chitooligomers or chitooligosaccharides (COS) are elicitors that bind to the plasma membrane (PM) and elicit various defense responses. However, the PM-bound proteins involved in elicitor-mediated plant defense responses still remain widely unknown. In order to get more information about PM proteins involved in rice defense responses, we conducted PM proteomic analysis of the rice suspension cells elicited by COS. A total of 14 up- or downregulated protein spots were observed on 2-D gels of PM fractions at 12 h and 24 h after COS incubation. Of them, eight protein spots were successfully identified by MS (mass spectrography) and predicted to be associated to the PM and function in plant defense, including a putative PKN/PRK1 protein kinase, a putative pyruvate kinase isozyme G, a putative zinc finger protein, a putative MAR-binding protein MFP1, and a putative calcium-dependent protein kinase. Interestingly, a COS-induced pM5-like protein was identified for the first time in plants, which is a transmembrane nodal modulator in transforming growth factor-β (TGFβ) signaling in vertebrates. We also identified two members of a rice polyprotein family, which were up-regulated by COS. Our study would provide a starting point for functionality of PM proteins in the rice basal defense.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.