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Proteomic Analysis of Rice Leaves Shows the Different Regulations to Osmotic Stress and Stress Signals
Author(s) -
Shu LieBo,
Ding Wei,
Wu JinHong,
Feng FangJun,
Luo LiJun,
Mei HanWei
Publication year - 2010
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/j.1744-7909.2010.00986.x
Subject(s) - osmotic shock , photosynthesis , downregulation and upregulation , stress (linguistics) , osmotic pressure , botany , biology , osmosis , osmotic concentration , microbiology and biotechnology , biochemistry , biophysics , chemistry , horticulture , membrane , gene , linguistics , philosophy
Following the idea of partial root‐zone drying (PRD) in crop cultivation, the morphological and physiological responses to partial root osmotic stress (PROS) and whole root osmotic stress (WROS) were investigated in rice. WROS caused stress symptoms like leaf rolling and membrane leakage. PROS stimulated stress signals, but did not cause severe leaf damage. By proteomic analysis, a total of 58 proteins showed differential expression after one or both treatments, and functional classification of these proteins suggests that stress signals regulate photosynthesis, carbohydrate and energy metabolism. Two other proteins (anthranilate synthase and submergence‐induced nickel‐binding protein) were upregulated only in the PROS plants, indicating their important roles in stress resistance. Additionally, more enzymes were involved in stress defense, redox homeostasis, lignin and ethylene synthesis in WROS leaves, suggesting a more comprehensive regulatory mechanism induced by osmotic stress. This study provides new insights into the complex molecular networks within plant leaves involved in the adaptation to osmotic stress and stress signals.