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RECORD NUMBER: 33 OF 158

OLS Field Name OLS Field Data
Main Title Comparative Kinetic Studies of Nitrate-Limited Growth and Nitrate Uptake in Phytoplankton in Continuous Culture.
Author Gotham, Ivan J. ; Rhee, G-Yull ;
CORP Author New York State Dept. of Health, Albany. Div. of Labs. and Research.;Environmental Research Lab.-Duluth, MN.
Year Published 1981
Report Number EPA-804689; EPA-600/J-81-630;
Stock Number PB83-243303
Additional Subjects Phytoplankton ; Inorganic nitrates ; Growth ; Fresh water biology ; Cells(Biology) ; Nitrogen ; Concentration(Composition) ; Least squares method ; Culture media ; Plant physiology ; Kinetics ; Regression analysis ; Reprints ; Asterionella formosa ; Ankistrodesmus falcatus ; Fragilaria crotonensis
Holdings
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Status
NTIS  PB83-243303 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 9p
Abstract
A comparative kinetic study of nitrate-limited growth and nitrate uptake was carried out in chemostat cultures of Ankistrodesmus falcatus, Asterionella formosa, Fragilaria crotonensis. In each species growth rate (microgram) was related to total cell nitrogen or cell quota (q) by the empirical Droop growth functions. Nitrate uptake was a function of both external N concentration and q. The apparent maximum uptake rate (v sub m) at a given microgram was inversely related to q - q sub o, where q sub o is the minimum quota. The apparent half-saturation constant for uptake (k sub m) appears to show a slight inverse trend with microgram, although statistical analysis show that this trend is inconclusive.