Effects of ozone or sulfur dioxide on pitch pine seedlings. [Pinus rigida Mill]

Journal Article · · Journal of Environmental Quality; (USA)

OSTI ID:7024582

Scherzer, A J ^[1]; McClenahen, J R ^[2]

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1. Ohio State Univ., Columbus (USA)
2. Ohio Agriculture Research and Development Center, Wooster (USA)

Pitch pine seedlings (Pinus rigida Mill.) were fumigated with O{sub 3} or SO{sub 2} to determine their effects on growth and symptom expression. Seedlings fumigated twice with 0.20 {mu}L O{sub 3} L{sup {minus}1} for 4 hr at age 14 and 22 wk had significantly greater shoot weight than those fumigated with 0.30 {mu}L O{sub 3}L{sup {minus}1}; 0, 0.08, 0.10, and 0.15 {mu}L L{sup {minus}1} were intermediate and not significantly different. Root starch content tended to decrease with increasing O{sub 3} with control seedlings being significantly higher than the 0.15, 0.20, and 0.30 {mu}L O{sub 3}L{sup {minus}1} treatments. Root starch of seedlings treated with 0.20, 0.50, 0.60, 0.70, and 0.90 {mu}L SO{sub 2} L{sup {minus}1} was significantly lower than the controls. Seedlings from six families fumigated for 5 wk starting at age 6 wk differed in direction and degree of growth response when exposed to 0.08 and 0.30 {mu}L O{sub 3} L{sup {minus}1}. Significant differences exited among families for needle weight, shoot weight, and total weight. No differences were found among O{sub 3} treatments within a family, but patterns suggest some pitch pine individuals may be sensitive to low O{sub 3} while others are stimulated. Visible injury consisted of light chlorotic mottle on oldest needles. Discriminant function analysis indicated that growth responses were indistinguishable among families receiving no treatment; however, treated seedlings could be classified based on various height measurements and/or shoot weight. Differences in visible injury were apparent among families of seedlings treated with 0.40 {mu}L O{sub 3} L{sup {minus}1}, indicating some pitch pine families are more sensitive to O{sub 3} than others.

• OSTI ID: 7024582
• Journal Information: Journal of Environmental Quality; (USA), Journal Name: Journal of Environmental Quality; (USA) Vol. 18:1; ISSN JEVQA; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CHALCOGENIDES
CHLOROSIS
CONIFERS
GROWTH
INJURIES
OXIDES
OXYGEN COMPOUNDS
OZONE
PATHOLOGICAL CHANGES
PINES
PINOPHYTA
PLANT GROWTH
PLANTS
SEEDLINGS
SENSITIVITY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TOXICITY
TREES