Premium
PHOTOSYNTHESIS AND EXCRETION IN VARIOUS PLANKTONIC ALGAE
Author(s) -
Nalewajko C.
Publication year - 1966
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.1966.11.1.0001
Subject(s) - chlorella pyrenoidosa , photosynthesis , excretion , algae , chlorophyceae , limiting , plankton , biology , population , botany , chlorella , environmental chemistry , chlorophyta , ecology , chemistry , biochemistry , mechanical engineering , demography , sociology , engineering
Twenty‐four species of planktonic algae, including 16 Chlorophyceae, seven Bacillariophyceae, and one Cyanophyceae, were found to liberate a part of their photosynthetic products into the medium. This excretion was less than 2% of the total carbon fixed during photosynthesis in short‐term experiments with dilute cell suspensions under conditions of abundant CO 2 supply and limiting or saturating light intensities. Excretion was increased at high population density, under conditions of limiting CO 2 levels and at light intensities sufficient to inhibit photosynthesis. Excretion values in Chlorella pyrenoidosa Chick. were usually lower than in other species under the same environmental conditions.