Ozone-induced alterations of K/sup +/ influx and efflux from Chlorella sorokiniana

Journal Article · Sat Jan 01 00:00:00 EST 1977 · Plant Physiol.; (United States)

OSTI ID:5321058

Heath, R L; Frederick, P E

The addition of ozone to a suspension of Chlorella sorokiniana causes a rapid loss of K/sup +/ (as measured by pre-labelling cells with /sup 86/RbCl as a tracer). While the medium and concentration of ozone has an effect on the kinetics, the loss always occurs and for 100 ppm ozone requires about 30 for 50% depletion of the cell's intracellular K/sup +/. The cessation of K/sup +/ loss after a 1 to 2 minute pulse of ozone requires from 10 to 15 minutes. On the other hand, the effect of ozone on the influx of K/sup +/ (as measured by /sup 86/RbCl) is greatly influenced by the medium and ozone concentration. The influx of K/sup +/ is inhibited by ozone only at high concentration for long periods of exposure (150 ppm for 5 minutes or 100 ppm for 20-25 minutes). At lower concentration or for short exposure times, the K/sup +/ influx is stimulated by 50-200%. It is thought that this stimulation is due to the loss of intracellular K/sup +/. Under conditions of high oxidant levels or long exposure periods, cells are unable to recover from this K/sup +/ loss.

• Research Organization: Univ. of California, Riverside
• OSTI ID: 5321058
• Journal Information: Plant Physiol.; (United States), Vol. 59:6
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
54 ENVIRONMENTAL SCIENCES
CHLORELLA
ION EXCHANGE
OZONE
BIOLOGICAL EFFECTS
CATIONS
DOSE-RESPONSE RELATIONSHIPS
LABELLED COMPOUNDS
POTASSIUM
RUBIDIUM 86
SORPTIVE PROPERTIES
TRACER TECHNIQUES
ALGAE
ALKALI METAL ISOTOPES
ALKALI METALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED PARTICLES
DAYS LIVING RADIOISOTOPES
ELEMENTS
INTERMEDIATE MASS NUCLEI
IONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
METALS
MICROORGANISMS
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
PLANTS
RADIOISOTOPES
RUBIDIUM ISOTOPES
SURFACE PROPERTIES
UNICELLULAR ALGAE
560302* - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)