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Premium TEMPERATURE DEPENDENCE OF GROWTH AND PHOSPHORUS UPTAKE IN TWO SPECIES OF VOLVOX (VOLVOCALES, CHLOROPHYTA) 1
Author(s)
Senft W. Herbert,
Hunchberger Robert A.,
Roberts Kenneth E.
Publication year1981
Publication title
journal of phycology
Resource typeJournals
PublisherBlackwell Publishing Ltd
ABSTRACT The growth of Volvox globator L. and Volvox aureus Ehr. was measured at five temperatures and nine phosphorus concentrations. Growth rates were hyperbolically related to phosphorus concentrations for all temperatures using a Monod growth model. Optimal growth rates of 1.17 and 1.00 doublings d −1 were obtained at 20°C for V. globator and V. aureus , respectively. Neither species grew at 5°C. The half‐saturation constants for growth, K s , were lower for V. aureus. Phosphorus uptake by both species was also dependent upon external phosphorus concentrations and temperature. At all temperatures, maximum phosphorus uptake (μmol P colony −1 min −1 ) was similar for both species; however, the half‐saturation constants for uptake showed significant differences between the species. Comparisons of the kinetic constants for growth and phosphorus uptake suggest that V. aureus will outcompete V. globator under phosphorus limited, conditions.
Subject(s)algae , biology , botany , chemistry , chlorophyta , combinatorics , ecology , mathematics , organic chemistry , phosphorus , saturation (graph theory)
Language(s)English
SCImago Journal Rank0.85
H-Index127
eISSN1529-8817
pISSN0022-3646
DOI10.1111/j.1529-8817.1981.tb00858.x

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