Effects of ammonium treatment on the protein and chlorophyll contents and the number of ribosomes in Chlamydomonas reinhardtii cells

Effects of ammonium treatment on the protein and chlorophyll contents and the number of ribosomes... The effects of exogenous ammonium on total protein and chlorophyll contents and the number of ribosomes in Chlamydomonas reinhardtii (Sager) green alga cells were studied. The absence of ammonium from nutrient medium resulted in a twofold drop in the number of ribosomes in the cytoplasm. The chlorophyll content of the cells grown on ammonium-free nitrate-containing medium insignificantly increased. The increase in the ribosome number in the presence of exogenous ammonium was not accompanied by the elevation of total cellular protein and did not depend on the levels of mRNA of rps6, a small ribosome subunit protein, and the 18S rRNA. Possible reasons for the effect of exogenous ammonium during ribosome biogenesis are discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Effects of ammonium treatment on the protein and chlorophyll contents and the number of ribosomes in Chlamydomonas reinhardtii cells

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2012 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Physiology; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443712050184
Publisher site
See Article on Publisher Site

Abstract

The effects of exogenous ammonium on total protein and chlorophyll contents and the number of ribosomes in Chlamydomonas reinhardtii (Sager) green alga cells were studied. The absence of ammonium from nutrient medium resulted in a twofold drop in the number of ribosomes in the cytoplasm. The chlorophyll content of the cells grown on ammonium-free nitrate-containing medium insignificantly increased. The increase in the ribosome number in the presence of exogenous ammonium was not accompanied by the elevation of total cellular protein and did not depend on the levels of mRNA of rps6, a small ribosome subunit protein, and the 18S rRNA. Possible reasons for the effect of exogenous ammonium during ribosome biogenesis are discussed.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 13, 2012

References

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