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Aufnahme von markiertem Zink durch Chlorella unterschiedlichen Zinkgehalts
Author(s) -
Wihlidal H.,
Broda E.
Publication year - 1978
Publication title -
zeitschrift für allgemeine mikrobiologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0044-2208
DOI - 10.1002/jobm.19780180608
Subject(s) - algae , zinc , chlorella , nitrogen , nuclear chemistry , chemistry , membrane permeability , chlorella vulgaris , botany , environmental chemistry , membrane , zoology , biology , biochemistry , organic chemistry
Chlorella fusca was grown asynchronously for 2 weeks in media with different Zn concentrations up to 10 −3 m. Growth was optimal at 10 −5 m Zn. The Zn contents of the algae were followed by activation analysis. They increased with increasing Zn concentration in the media, and, except with the lowest Zn concentrations, with time. Further, the uptake of labelled Zn ( 65 Zn) from 5 · 10 −6 m solution by cells of known Zn content was measured at 30 °C during one day in minimum and optimum conditions (dark/nitrogen or light/air, respectively). The rate of uptake showed a maximum with algae grown in a medium with 10 −5 m Zn. However, algae exposed to a lethal Zn concentration (10 −3 m) also absorbed much Zn; this anomalous uptake is ascribed to a breakdown of the cell membrane as a permeability barrier.