Effects of long-term ozone exposure on photosynthesis and dark respiration of eastern white pine

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es00112a013· OSTI ID:5651699

Yang, Y S; Skelly, J M; Chevone, B I; Birch, J B

Net photosynthetic (P/sub N/) and dark respiratory rates (R/sub D/) of three eastern white pine (Pinus strobus L.) clones differing in sensitivity to ozone were determined during long-term O/sub 3/ exposure. Fumigations occurred for 4 h daily with 0.00, 0.10, 0.20, 0.30 ..mu..L/L O/sub 3/ for 50 consecutive days. Every 10 days, P/sub N/ and R/sub D/ were measured. Ozone exposure adversely affected P/sub N/, and the magnitude of this effect was dependent upon the clone, O/sub 3/ concentration, and duration of O/sub 3/ exposure. Dark respiration of the O/sub 3/-treated sensitive clone was significantly decreased compared to controls, whereas R/sub D/ of the other clones was unaffected at all O/sub 3/ concentrations. The implications of P/sub N/ inhibition and decline of R/sub D/ due to O/sub 3/ fumigation in relation to plant biomass production and foliar symptom expression are discussed.

• Research Organization: Virginia Polytechnic Institute and State University, Blacksburg
• OSTI ID: 5651699
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 17:6; ISSN ESTHA
• 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.
BIOLOGICAL EFFECTS
CHEMICAL REACTIONS
CHRONIC EXPOSURE
CONIFERS
DOSE-RESPONSE RELATIONSHIPS
INHIBITION
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PINES
PLANTS
RESPIRATION
SENSITIVITY
SYNTHESIS
TREES