Acute foliar injury of eastern white pine induced by sulfur dioxide and ozone
Ramets of eastern white pine (Pinus strobus) were exposed to both SO/sub 2/ and O/sub 3/ in a controlled-environment chamber. Current needles between 4 and 5 weeks old were acutely injured by SO/sub 2/ at dosages ranging from 15 +- 5 parts/hundred million (ppHM) for 2 h to concentrations as low as 5 +- 1.5 ppHM for 1 h. These results demonstrated that certain strains of the eastern white pine trees are extremely sensitive to low levels of SO/sub 2/. New needles on different branchlets of the same tree could be independently injured by either O/sub 3/ or SO/sub 2/ at approximately 25 +- 5 ppHM for 2 h. Sulfur dioxide was considerably more phytotoxic than O/sub 3/. Macroscopic differences in development of injury on new needles induced by both gases are discussed. No histological differences of diagnostic significance were noted between the two kinds of injury.
- OSTI ID:
- 5595889
- Journal Information:
- Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 60:6; ISSN PHYTA
- Country of Publication:
- United States
- Language:
- English
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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.
ACID RAIN
ACIDIFICATION
ATMOSPHERIC PRECIPITATIONS
BIOLOGICAL EFFECTS
BIOLOGICAL STRESS
CHALCOGENIDES
CONIFERS
DEPOSITION
FOLIAR UPTAKE
LEAVES
OXIDES
OXYGEN COMPOUNDS
OZONE
PINES
PLANTS
RAIN
SENSITIVITY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TOXICITY
TREES
UPTAKE