ISSN:
1432-2048
Keywords:
Amino acids
;
Anabaena
;
Glutamine synthetase
;
Heterocysts
;
Methionine sulfoximine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Heterocyst development in ammonia-grown cultures of Anabaena variabilis and Anabaena 7120 was fully induced by the amino-acid analog methionine sulfoximine (MSO) at concentrations of 0.5–1.0 μM. Glutamine, glutamate, aspartate, and alanine at 0.5 mM blocked the induction of heterocysts by MSO in A. variabilis. With Anabaena 7120, glutamine and glutamate were fully effective and alanine partially effective in preventing MSO-induced heterocyst formation. In MSO-treated algae, glutamine synthetase activity was reduced to less than 15% of control values within 4–6 h. Inactivation of the enzyme was prevented by all four amino acids tested.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00385996
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