This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Web of Science (35) Citing Articles via Google Scholar Google Scholar Articles by Weger, H. G. Articles by Turpin, D. H. Search for Related Content PubMed PubMed Citation Articles by Weger, H. G. Articles by Turpin, D. H. Agricola Articles by Weger, H. G. Articles by Turpin, D. H.

Metabolism and Enzymology

Cytochrome and Alternative Pathway Respiration in Green Algae ¹

Measurements Using Inhibitors and ¹⁸O₂ Discrimination

Department of Biology, Queen's University, Kingston, ON, Canada K7L 3N6, Department of Forest Sciences, University of British Columbia, Vancouver, BC, Canada V6T 1W5

Inhibitor titration curves and discrimination against ¹⁸O₂ by mitochondrial respiration in three strains of green algae (Selenastrum minutum [Naeg.] Collins, and two strains of Chlamydomonas reinhardtii Dangeard) with differing respiratory capabilities were determined. Discrimination for cytochrome pathway respiration ranged from 19.89 to 20.43%. Discrimination for alternative pathway respiration by wild-type C. reinhardtii (measured in the presence of KCN) was 25.46%, while discrimination values for a cytochrome oxidase deficient mutant of C. reinhardtii ranged from 24.24 to 24.96%. In the absence of KCN, the alternative pathway was not engaged in wild-type C. reinhardtii, the only algal strain that possessed both cytochrome and alternative pathway capacities.

This article has been cited by other articles:

				P. B. Heifetz, B. Förster, C. B. Osmond, L. J. Giles, and J. E. Boynton Effects of Acetate on Facultative Autotrophy in Chlamydomonas reinhardtii Assessed by Photosynthetic Measurements and Stable Isotope Analyses Plant Physiology, April 1, 2000; 122(4): 1439 - 1446. [Abstract] [Full Text]