Abstract
A significant decrease in the amount of a protein, whose migration in two-dimensional gel electrophoresis corresponds to an apparent molecular mass of 23 kDa and pI=6.5, was observed in leaves of NaCl-treated Bruguiera parviflora (Roxb.) Wt. & Arn. ex Griff. seedlings. This particular salt-sensitive protein, designated as SSP-23, almost disappeared after 45 days of treatment in 400 mM NaCl as compared to untreated seedlings (0 mM NaCl) where the presence of the protein was significant. A polyclonal antibody raised against the 23-kDa protein was used to determine the subcellular localization of this protein in leaves by cross-reaction with proteins from isolated chloroplasts, mitochondria, peroxisomes and cytosol fractions on Western blots. SSP-23 was confirmed to be localized in the cytosol by immunoblotting. The disappearance of SSP-23 as a result of high NaCl treatment suggests that this protein is salt-sensitive and has a possible role in salt adaptation.
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Abbreviations
- 2-D :
-
Two dimensional
- PAGE :
-
Polyacrylamide gel electrophoresis
- SDS :
-
Sodium dodecyl sulfate
- SSP :
-
Salt-sensitive protein
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Acknowledgements
The authors are grateful to Prof. P. Das, Director, Regional Plant Resource Centre, Bhubaneswar for providing laboratory facilities. The financial assistance from CSIR (Grant No. 38(983)/EMR-II), New Delhi, is duly acknowledged.
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Parida, A.K., Mittra, B., Das, A.B. et al. High salinity reduces the content of a highly abundant 23-kDa protein of the mangrove Bruguiera parviflora. Planta 221, 135–140 (2005). https://doi.org/10.1007/s00425-004-1415-2
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DOI: https://doi.org/10.1007/s00425-004-1415-2