Isolation of cyclic adenosine 3':5'-monophosphate (cAMP) from lakes of differing trophic status: Correlation with planktonic metabolic variables

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Limnol. Oceanogr.; (United States)

DOI:https://doi.org/10.4319/lo.1982.27.1.0027· OSTI ID:6220032

Francko, D A; Wetzel, R G

The seasonal dynamics of particulate and dissolved cyclic adenosine 3':5'-monophosphate (cAMP) were examined in the epilimnia and littoral zones of two trophically dissimilar lakes. Each cAMP fraction was found in quantities comparable to those reported for cultured phytoplankton species. Both cAMP fractions varied greatly in concentration during the season and between the oligotrophic and hypereutrophic lakes. Increases in phytoplankton community densities were paralleled by weight-specific changes in particulate cAMP levels, depending on the phytoplankton species present. A linear relationship between cellular cAMP levels and in situ primary productivity rates was found in the oligotrophic lake. In both lakes, certain phytoplanktonic associations had particulate cAMP levels linearly related to chlorophyll a content and specific activity of alkaline phosphatase.

• Research Organization: Michigan State Univ., Hickory Corners
• OSTI ID: 6220032
• Journal Information: Limnol. Oceanogr.; (United States), Vol. 27:1
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AMP
WATER CHEMISTRY
LAKES
LIMNOLOGY
PHYTOPLANKTON
METABOLISM
ALKALINE PHOSPHATASE
BIOCHEMICAL REACTION KINETICS
CHLOROPHYLL
EXPERIMENTAL DATA
PARTICULATES
POPULATION DENSITY
SEASONAL VARIATIONS
AQUATIC ORGANISMS
CARBOXYLIC ACIDS
CHEMISTRY
DATA
ENZYMES
ESTERASES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROLASES
INFORMATION
KINETICS
NUCLEOTIDES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARTICLES
PHOSPHATASES
PHYTOCHROMES
PIGMENTS
PLANKTON
PORPHYRINS
REACTION KINETICS
SURFACE WATERS
VARIATIONS
520100* - Environment
Aquatic- Basic Studies- (-1989)