Influence of Light on the Alkaline Phosphatase Activity ofSelenastrum capricornutum(Chlorophyceae) in Streams

1 February 1985

journal article
Published by Canadian Science Publishing in Canadian Journal of Fisheries and Aquatic Sciences

Vol. 42 (2) , 384-388
https://doi.org/10.1139/f85-051

Abstract

The alkaline phosphatase activity (APA) of Selenastrum capricomutum Printz incubated in situ in four streams in New York State was inversely related to total insolation. APA was not correlated with stream molybdate reactive phosphorus over the range of concentrations encountered. Selenastrum showed no diel cycle of APA. The phosphorus fraction made available by the activity of alkaline phosphatases, enzyme hydrolyzable phosphorus (measured for the first time in streams), increased the phosphorus supply to organisms with high APA.

Keywords

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