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Publication Type J
Authors Tada, Y. and T. Kashimura
Title Proteomic Analysis of Salt-Responsive Proteins in the Mangrove Plant, Bruguiera gymnorhiza
Source Plant and Cell Physiology
Author Keywords Bruguiera gymnorhiza Mangrove Proteome Salt tolerance salinity stress burma mangrove rice leaf thellungiella-halophila transcription factor expression profiles osmotic-stress arabidopsis gene microarray
Abstract To identify key proteins in the regulation of salt tolerance in the mangrove plant Bruguiera gymnorhiza, proteome analysis of samples grown under conditions of salt stress was performed. Comparative two-dimensional electrophoresis revealed that two, three and one protein were differentially expressed in the main root, lateral root and leaf, respectively, in response to salt stress. Among these, three proteins were identified by internal peptide sequence analysis: fructose-1,6-bisphosphate (FBP) aldolase and a novel protein in the main root, and osmotin in the lateral root. These results suggest that FBP aldolase and osmotin play roles in salt tolerance mechanisms common to both glycophytes and mangrove plants. Osmotin was abundant at early time points following salt treatment and seems to play a role in initial osmotic adaptation in lateral roots of B. gymnorhiza under salt stress, but does not contribute towards adaptation to prolonged or continuous exposure to salt stress. The amounts of these proteins were not correlated with those of the respective mRNAs, as determined by microarray analysis. A novel salt-responsive protein, not previously detected by expressed sequence tag analysis or transcriptome analysis, was also identified in this proteomic approach, and may provide insight into the salt tolerance mechanism of the mangrove plant. This is the first report of proteome analysis with detailed analysis of main and lateral roots of mangrove plants under salt stress conditions.
Author Address [Tada, Y; Kashimura, T] Tokyo Univ Technol, Sch Biosci & Biotechnol, Tokyo 1920982, Japan. Tada, Y (reprint author), Tokyo Univ Technol, Sch Biosci & Biotechnol, 1404-1 Katakura, Tokyo 1920982, Japan tadayui@bs.teu.ac.jp
ISSN 0032-0781
ISBN 0032-0781
29-Character Source Abbreviation Plant Cell Physiol.
Publication Date Mar
Year Published 2009
Volume 50
Issue 3
Beginning Page 439-446
Digital Object Identifier (DOI) 10.1093/pcp/pcp002
Unique Article Identifier WOS:000264395800002
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