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Effects of air pollutants on photosynthesis, vegetative growth, and development of grapevines in the San Joaquin Valley of California. Final report, February 1987-February 1989

Technical Report ·
OSTI ID:5414999
; ;
Mature Thompson Seedless grapevines were exposed to charcoal-filtered air or ambient ozone in open-top field chambers near Fresno, CA. Chronic exposure to ambient ozone reduced net carbon dioxide assimilation rates an average of 9% through the season when compared to the filtered-air treatment. The initial slope of a carboxylation efficiency curve was less for the ambient ozone treatment compared to the filtered-air treatment. Individual leaves were exposed to ozone concentrations of 200, 400, or 600 ppb for 5 to 10 hours. No visual ozone damage was found. Exposure of leaves to 200 ppb ozone for 5 hours had no effect on photosynthesis. Photosynthesis was reduced approximately 50 to 80% respectively after 5 hours of exposure to 400 and 600 ppb ozone compared to the controls. There were no significant differences in vine-growth parameters, bud fruitfulness or yield between vines exposed to either filtered or ambient air. Net carbon dioxide assimilation rates for five of six potted grape cultivars exposed to 1.5 times ambient ozone concentrations were substantially less than for those grown in the charcoal-filtered air. The cultivar 'Barbera' had greater rates of photosynthesis at the higher ozone concentration.
Research Organization:
California Univ., Davis, CA (USA)
OSTI ID:
5414999
Report Number(s):
PB-89-222665/XAB
Country of Publication:
United States
Language:
English

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Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
CALIFORNIA
CARBOHYDRATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DOCUMENT TYPES
ENVIRONMENTAL IMPACTS
EXPOSURE CHAMBERS
FEDERAL REGION IX
GROWTH
NORTH AMERICA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANT GROWTH
POLLUTION
PROGRESS REPORT
SYNTHESIS
USA