Uptake of methylamine (an ammonium analogue) by Macrocystis pyrifera (phaeophyta)

Journal Article · Thu Mar 01 04:00:00 EST 1979 · J. Phycol.; (United States)

DOI:https://doi.org/10.1111/j.0022-3646.1979.00012.x· OSTI ID:5538247

Wheeler, P A

The ammonium analogue, methylamine, is taken up rapidly from dilute solution by Macrocystis pyrifera (L.) C. A. Agardh. /sup 14/C-methylamine was used to characterize the transport system, with respect to dependence on external concentration, temperature, pH and substrate specificity. The results suggest that methylamine enters the algal tissue via a specific mediated transport system. Uptake of methylamine showed no consistent relation to the N content of the plant tissue, but was highly dependent on the portion of plant sampled and severely affected by cutting the tissue. The strong inhibition of methylamine uptake by ammonium and lesser inhibition by other alkylamines suggests that the uptake system functions as an ammonium permease. Uptake of /sup 14/C-methylamine can be used as a highly sensitive measure of NH/sub 4//sup +/ uptake activity and should be a useful tool for studying NH/sub 4//sup +/ uptake in the laboratory and field.

• Research Organization: California Inst. of Tech., Corona del Mar, CA
• OSTI ID: 5538247
• Journal Information: J. Phycol.; (United States), Journal Name: J. Phycol.; (United States) Vol. 15:1; ISSN JPYLA
• Country of Publication: United States
• Language: English

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59 BASIC BIOLOGICAL SCIENCES
ALGAE
AMINES
BIOLOGICAL EFFECTS
CARBON 14 COMPOUNDS
DATA
DATA FORMS
EXPERIMENTAL DATA
INFORMATION
ISOLATED VALUES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
METABOLISM
METHYLAMINE
NUMERICAL DATA
ORGANIC COMPOUNDS
PH VALUE
PLANTS
QUANTITY RATIO
SPECIFICITY
SUBSTRATES
TEMPERATURE EFFECTS
TIME DEPENDENCE
TRACER TECHNIQUES
UPTAKE