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Publication Type J
Authors Zhang, X., L. Q. Wei, Z. Z. Wang and T. Wang
Title Physiological and Molecular Features of Puccinellia tenuiflora Tolerating Salt and Alkaline-Salt Stress
Source Journal of Integrative Plant Biology
Author Keywords Puccinellia tenuiflora halophyte salt and alkaline-salt tolerance microarray assay gene expression profiles activated protein-kinase gene-expression profiles genome-scale analysis thellungiella-halophila arabidopsis-thaliana signal-transduction salinity tolerance cold stresses cog database oryza-sativa
Abstract Saline-alkali soil seriously threatens agriculture productivity; therefore, understanding the mechanism of plant tolerance to alkaline-salt stress has become a major challenge. Halophytic Puccinellia tenuiflora can tolerate salt and alkaline-salt stress, and is thus an ideal plant for studying this tolerance mechanism. In this study, we examined the salt and alkaline-salt stress tolerance of P. tenuiflora, and analyzed gene expression profiles under these stresses. Physiological experiments revealed that P. tenuiflora can grow normally with maximum stress under 600 mmol/L NaCl and 150 mmol/L Na2CO3 (pH 11.0) for 6 d. We identified 4,982 unigenes closely homologous to rice and barley. Furthermore, 1,105 genes showed differentially expressed profiles under salt and alkaline-salt treatments. Differentially expressed genes were overrepresented in functions of photosynthesis, oxidation reduction, signal transduction, and transcription regulation. Almost all genes downregulated under salt and alkaline-salt stress were related to cell structure, photosynthesis, and protein synthesis. Comparing with salt stress, alkaline-salt stress triggered more differentially expressed genes and significantly upregulated genes related to H+ transport and citric acid synthesis. These data indicate common and diverse features of salt and alkaline-salt stress tolerance, and give novel insights into the molecular and physiological mechanisms of plant salt and alkaline-salt tolerance.
Author Address Chinese Acad Sci, Inst Bot, Natl Ctr Plant Gene Res, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China. Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China. Wang, T (reprint author), Chinese Acad Sci, Inst Bot, Natl Ctr Plant Gene Res, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China. twang@ibcas.ac.cn
ISSN 1672-9072
ISBN 1672-9072
29-Character Source Abbreviation J. Integr. Plant Biol.
Publication Date Mar
Year Published 2013
Volume 55
Issue 3
Beginning Page 262-276
Digital Object Identifier (DOI) 10.1111/jipb.12013
Unique Article Identifier WOS:000318603000006
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