Influence of SO/sub 2/ on 10 forest tree species with reference to relative susceptibility, leaf sulfur content, and stomatal response

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Proc. Amer. Phytopathol. Soc.; (United States)

OSTI ID:6167675

Biggs, A R; Davis, D D; Coppolino, J B

Ten species of 2-3 year old tree seedlings were exposed biweekly to 2358 ..mu..g/m/sup 3/ SO/sub 2/ (0.9 ppm) for 2 hr from May to September 1977. Exposures were conducted in controlled environment chambers maintained at 22C, 75% RH, and 25 Klux light intensity, using a different set of 4 plants of each species each time. Percent foliar tissue injury was evaluated 3 days after each exposure. Betula nigra was the most susceptible species, followed by Pinus sylvestris. B lenta, B. papyrifera, B. pubescens, Prunus serotina, Fraxinus americana, Populus trichocarpa X P. maximowizii, Pinus strobus, and P. nigra were all more tolerant than B. nigra or P. sylvestris. Typical symptoms were interveinal necrosis on the broadleaved seedlings and needle tip necrosis on the conifers. Leaf sulfur content of the birch species increased after plants were exposed to SO/sub 2/. The relative amount of sulfur absorbed by the different birches does not appear correlated with visible injury. The response of the stomata to SO/sub 2/ does not appear related to pre-exposure leaf sulfur content, sulfur accumulation in the leaf, or visible injury.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 6167675
• Journal Information: Proc. Amer. Phytopathol. Soc.; (United States), Journal Name: Proc. Amer. Phytopathol. Soc.; (United States) Vol. 4; ISSN PAPSD
• 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
BIRCHES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHRONIC EXPOSURE
COMPARATIVE EVALUATIONS
CONIFERS
NECROSIS
OPENINGS
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
PINES
PLANTS
POPLARS
SEEDLINGS
SENSITIVITY
STOMATA
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SYMPTOMS
TREES