Response of chronically ozonated soybean plants to an acute ozone exposure
The effects of chronic ozone (O/sub 3/) exposures on the sensitivity of soybean to a subsequent acute exposure to O/sub 3/ were measured. Plants were exposed to low concentrations (less than or equal to0.10 ppM O/sub 3/) or to charcoal-filtered air (0.0 ppM O/sub 3/) for 6 hr/day on 5, 10, or 15 consecutive days (chronic dose). One day after the last chronic exposure, plants were exposed for 3 hr to 0.20 ppM of O/sub 3/ (acute dose) or to filtered air. Plants exposed to chronic doses of O/sub 3/ below the visible injury threshold (less than or equal to0.06 ppM) were more sensitive to the acute O/sub 3/ dose than were plants exposed to filtered air. Plants exposed to chronic O/sub 3/ doses above the visible injury threshold (greater than or equal to0.06 ppM) were less susceptible to the acute O/sub 3/ dose than were plants exposed to filtered air. The predisposition toward greater sensitivity to the acute O/sub 3/ dose tended to be cumulative over time and was partially reversed by treatment with filtered air prior to the acute exposure. 10 references, 2 tables.
- Research Organization:
- Dept. of Agriculture, Raleigh, NC
- OSTI ID:
- 7132729
- Journal Information:
- Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 72:4; ISSN PHYTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Injury and yield responses of peanuts to chronic doses of ozone in open-top field chambers
Pulmonary function adaptation to ozone in subjects with chronic bronchitis
Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACUTE EXPOSURE
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
BIOLOGICAL EFFECTS
CHEMISTRY
CHRONIC EXPOSURE
ECOLOGICAL CONCENTRATION
GLYCINE HISPIDA
LEGUMINOSAE
OZONE
PLANTS
POLLUTION
SENSITIVITY