Journal
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
Volume 87, Issue 1, Pages 47-53Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.pestbp.2006.06.003
Keywords
microalgae; atrazine; protein; carbon allocation; subcellular response
Categories
Ask authors/readers for more resources
Physiological effects of the commonly used herbicide atrazine were examined by quantifying changes in carbon allocation into macromolecular pools (low molecular weight (LMW) molecules, lipids, polysaccharides, and proteins) of five microalgal species. Despite decreased growth rate in all test populations, total carbon uptake per cell varied among species. Specifically, total carbon uptake per cell was unaffected in Pseudokirchneriella subcapitata and Isochrysis galbana; increased in Synechococcus sp.; and decreased in Dunaliella tertiolecta and Phaeodactylum tricornutum. In the chlorophytes, P. subcapitata and D. tertiolecta, carbon allocation into LMW molecules increased while carbon allocation into protein decreased. D. tertiolecta also increased carbon allocation into lipids and polysaccharides at the highest atrazine treatment. In the cyanobacterium, Synechococcus sp., carbon allocation into LMW molecules decreased and carbon allocation into protein increased. The diatom, P. tricornutum, had decreased carbon allocation into protein at the highest atrazine concentration tested. No significant macromolecular changes were found in the prymnesiophyte, I. galbana. Alterations in the macromolecular composition of microalgal species may negatively affect higher trophic levels, as nutritionally altered algal cells may have a reduced energy per mass uptake for consumers. (c) 2006 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available