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Proteomic Analysis of Osmotic Stress-Responsive Proteins in Sugarcane Leaves

文献类型: 外文期刊

作者: Zhou, Gui 2 ; Yang, Li-Tao 1 ; Li, Yang-Rui 1 ; Zou, Cheng-Lin 2 ; Huang, Li-Ping 2 ; Qiu, Li-Hang 1 ; Huang, Xing 1 ; Sr 1 ;

作者机构: 1.Guangxi Univ, State Key Lab Subtrop Agribioresources Conservat, Coll Agr, Nanning 530004, Guangxi, Peoples R China

2.Guangxi Univ Nationalities, Nanning 530006, Guangxi, Peoples R China

3.Guangxi Acad Agr Sci, Sugarcane Res Ctr, Chinese Acad Agr Sci, Guangxi Key Lab Sugarcane Genet Improvement,Sugar, Nanning 530007, Peoples R China

关键词: Sugarcane;Osmotic stress;Proteomics;Two-dimensional polyacrylamide gel electrophoresis;MALDI-TOF-MS

期刊名称:PLANT MOLECULAR BIOLOGY REPORTER ( 影响因子:1.595; 五年影响因子:2.042 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Osmotic stress-related proteins in sugarcane were identified using proteomics approach based on two-dimensional polyacrylamide gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS). Sugarcane settlings were subjected to osmotic stress in the nutrient solution containing 10% (w/v) PEG 6000 for 14 h. Total proteins were extracted from leaves, and separated by 2-DE. Four typical spots exhibited significant changes in PEG treatment compared to control, which were identified using MALDI-TOF-MS successfully. The drought inducible 22 kDa protein and Rubisco small subunit were up-regulated while isoflavone reductase-like (IRLs, related to antioxidant defense system) protein and delta chain of ATP synthase were down-regulated by the osmotic stress. Analysis of the results showed that the most differential proteins under osmotic stress were acidic, unstable and transmembrane proteins, enriched with hydrophobic amino acids such as leucine and alanine which are extremely important for structural stabilization of proteins by hydrophobic interaction. However, the drought inducible 22 kDa protein was a hydrophile and non-transmembrane protein enriched with glutamic acid. These results provide new insight into the part of regulatory mechanism of adaptations to osmotic stress through differential expression of specific proteins and implicate several previously unrecognized proteins to osmotic stress.

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