Uptake of free amino acids by the diatom, Melosira mediocris

Individual super(14)C-labelled amino acids are rapidly removed from dilute solution in artificial sea water (0.2 mu mol l super(-1)) by suspensions of Meliosira medocris . The rate of disappearance of radioactivity corresponds closely to removal of primary amines as determined by measurement of the...

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Bibliographic Details
Published in:Hydrobiologia 1985-09, Vol.128 (2), p.187-191
Main Authors: LU MING, STEPHENS, G. C
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Autoecology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Marine
Plants and fungi
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Summary:Individual super(14)C-labelled amino acids are rapidly removed from dilute solution in artificial sea water (0.2 mu mol l super(-1)) by suspensions of Meliosira medocris . The rate of disappearance of radioactivity corresponds closely to removal of primary amines as determined by measurement of the rate of decrease of fluorescamine-positive material. Net removal of naturally occurring free amino acids from the sea water habitat from which the alga was isolated is demonstrated using high performance liquid chromatography. Removal of amino acids from natural sources makes a significant contribution to the carbon requirements of the alga as well as supplying significant amounts of amino nitrogen.
ISSN:0018-8158
1573-5117
DOI:10.1007/BF00008738