Document Detail

Osmoregulatory role of alanine during salt stress in the nitrogen fixing cyanobacterium Anabaena sp. 287.
MedLine Citation:
PMID:  1677806     Owner:  NLM     Status:  MEDLINE    
The freshwater cyanobacterium, Anabaena sp. 287 exhibited enhanced tolerance to NaCl in the presence of ammonium, nitrate, and the amino acids, alanine, valine, proline, lysine, histidine, methionine and aspartic acid. Apart from providing permanent protection to the growth during stress, like NO3- and NH4+, alanine also relieved the initial salt mediated inhibition on enzymes involved in nitrogen fixation, photosynthesis and respiration. The accumulation of sugars was observed only during molecular nitrogen growth in the presence of salt. The cellular total nitrogen content was inversely proportional to the total sugar concentration. All nitrogenous substances which supported growth in the presence of salt curtailed the Na+ influx. Sodium chloride concentration-dependent [3H]D-alanine uptake in this cyanobacterium favours the conclusion that alanine acts as an osmoregulator along with sugars.
S P Thomas; S Shanmugasundaram
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochemistry international     Volume:  23     ISSN:  0158-5231     ISO Abbreviation:  Biochem. Int.     Publication Date:  1991 Jan 
Date Detail:
Created Date:  1991-08-30     Completed Date:  1991-08-30     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  8100311     Medline TA:  Biochem Int     Country:  AUSTRALIA    
Other Details:
Languages:  eng     Pagination:  93-102     Citation Subset:  IM    
Department of Microbiology and Microbial Technology, School of Biological Sciences, Madurai Kamaraj University, India.
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MeSH Terms
Alanine / pharmacology*
Amino Acids / pharmacology
Carbohydrates / pharmacology
Cyanobacteria / physiology*
Cytochrome c Group / metabolism
Enzyme Inhibitors
Glutamate-Ammonia Ligase / metabolism
Nitrates / pharmacology
Nitrogen Fixation
Nitrogenase / metabolism
Oxygen Consumption
Quaternary Ammonium Compounds / pharmacology
Sodium Chloride / pharmacology*
Water-Electrolyte Balance / physiology
Reg. No./Substance:
0/Amino Acids; 0/Carbohydrates; 0/Cytochrome c Group; 0/Enzyme Inhibitors; 0/Nitrates; 0/Quaternary Ammonium Compounds; 56-41-7/Alanine; 7647-14-5/Sodium Chloride; EC; EC Ligase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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