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AMINO ACID AND UREA UPTAKE IN TEN SPECIES OF CHLOROPHYTA 1
Author(s) -
Kirk David L.,
Kirk Marilyn M.
Publication year - 1978
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1978.tb02449.x
Subject(s) - amino acid , biology , arginine , lysine , urea , biochemistry , leucine , chlorophyta , nitrate , algae , botany , ecology
The Uptake of radioartively‐labelled mixed amino acids, arginine, lysine, leucine, glutamic acid and urea was examined in six species of Volvocales and four species of Chlarococcales grown in nitrate‐containing medium. Nonradioactive amino acids in excess were used to estimate specificity of amino and carriers in selected cases. All ten species possess salurable (hence, carrier‐mediated) systems for uptake of both arginine and urea. In all Volvacales and one Chlorococcales, the arginine‐speciftc carrier (which also transported lysine with lower efficiency) was the only amino acid carrier detected. Three species of Chlororoccales appear to possess a separate carrier for lysine and two of these appear to possess at least one additional carrier that is involved in uptake of non‐basic amino acids .