Effects of small concentrations of chromium on growth and photosynthesis in algae

Journal Article · Mon Dec 31 23:00:00 EST 1973 · Mich. Acad.; (United States)

OSTI ID:5651187

Zarafonetis, J H; Hampton, R E

Chlorella pyrenoidosa and Chlamydomonas reinhardii were used as test organisms for growth rate experiments. To determine the effect of hexavalent Cr on net photosynthesis of a natural population, water samples were taken from the Chippewa River, Michigan. Hexavalent chromium at concentrations of 10 and 20 ppb had no apparent effect on the growth rate of C. pyrenoidosa but strongly inhibited the growth of C. reinhardii. This is similar to the selective toxicity exhibited by DDT and other toxicants. The effect of hexavalent Cr on net photosynthesis of the river samples was substantial at concentrations of 20 and 50 ppb. Microscopic examination indicated that the population consisted chiefly of diatoms and a smaller proportion of unicellular green algae. 4 references, 2 figures, 1 table.

• Research Organization: Central Michigan Univ., Mount Pleasant
• OSTI ID: 5651187
• Journal Information: Mich. Acad.; (United States), Journal Name: Mich. Acad.; (United States) Vol. 6:4; ISSN MACDA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALGAE
BIOLOGICAL EFFECTS
CHEMICAL REACTIONS
CHLAMYDOMONAS
CHLORELLA
CHROMIUM
DIATOMS
DOSE-RESPONSE RELATIONSHIPS
ELEMENTS
GROWTH
INHIBITION
METALS
MICROORGANISMS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANTS
SENSITIVITY
SYNTHESIS
TOXICITY
TRANSITION ELEMENTS
UNICELLULAR ALGAE
VARIATIONS