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Lack of an effect of light on methylamine uptake by phytoplankton 1
Author(s) -
Balch William M.
Publication year - 1985
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1985.30.3.0665
Subject(s) - methylamine , dinoflagellate , ammonium , diatom , bicarbonate , phytoplankton , chemistry , ammonium bicarbonate , biophysics , environmental chemistry , botany , biology , biochemistry , organic chemistry , nutrient , raw material
Light‐dependent ammonium up take was studied with an analogue of ammonium, methylamine. This analogue is nonassimilable by phytoplankton so far examined; a low percentage is incorporated into macromolecules, so that the uptake or membrane transport process can be measured with little complication from assimilatory process. Single label incubations ([ 14 C] methylamine) and dual label incubations ([ 3 H] methylamine and [ 14 C]bicarbonate) were used to show that there is no light‐dependent MeA uptake in an oceanic diatom, dinoflagellate, coccolithophorid, or in natural populations (particles > 1‐ µ m diam).