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Effects of Salt Stress on Chemical Composition and Protein Conformation Changes in Thellungiella and Arabidopsis Seedlings(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2008 No.03
Page:
371-377
Research Field:
Reviews
Publishing date:

Info

Title:
Effects of Salt Stress on Chemical Composition and Protein Conformation Changes in Thellungiella and Arabidopsis Seedlings
Author(s):
ZHAO Xin et al.
(1Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China) (2Instrumental Analysis & Research Center, Lanzhou University, Lanzhou 730000, China) (3Institue of Botany, Chinese Academy of Sciences, Beijing 10093, China) (4Shool of Life Sciences, Lanzhou University, Lanzhou 730000, China)
Keywords:
Keywords Thellungiella halophila Arabidopsis thaliana FTIR chemical composition protein structure
CLC:
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DOI:
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Abstract:
Abstract A technique based on Fourier transform infrared (FTIR) spectrometry was used to detect the corresponding changes in chemical composition which associated with the rapid changes in sodium with 200 mmol/L NaCl stressed halophyte Thellungiella halophila. The changes in glycophyte Arabidopsis thaliana stressed with 50 mmol/L NaCl were also examined for comparison. The results showed that within 48 h of mild salt stress, the absorption band intensities in the fingerprint region decreased continuously in both the plants, suggesting that the carbon assimilation was affected at the early stage of stress. The intensities of ester and amide I absorption bands decreased slightly in A. thaliana, but increased in T. halophila, suggesting that the cell expansion and protein synthesis ceased in A. thaliana but continued in T. halophila. In the two plants, the analysis of the ratio between 1 668 and 1 638 cm-1 in amide I absorption bands revealed that T. halophila was able to maintain a higherordered form of proteins under the stress. Furthermore, the changes in protein conformation showed a positive correlation with the sodium contents in T. halophila leaves. Fig 6, Tab 1, Ref 29

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Last Update: 2008-07-01