Effects of sulfur dioxide on Pinus resinosa seedlings in the cotyledon stage

Journal Article · Thu Jan 01 04:00:00 EST 1976 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1976.00472425000500020006x· OSTI ID:7139521

Constantinidou, H ^[1]; Kozlowski, T T; Jensen, K

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1. Univ. of Wisconsin, Madison

Seedlings of red pine (Pinus resinosa Ait.) in the cotyledon stage of development were exposed to four concentrations of SO/sub 2/ (0.5, 1, 3, or 4 ppm) at four exposure times (15, 30, 60, or 120 minutes). Seedling development was inhibited by SO/sub 2/ at all concentrations for 120 minutes and at 1.0 ppm and above for 30 minutes or longer. The adverse effects were proportional to SO/sub 2/ concentration and duration of exposure. The fumigations induced chlorosis in both cotyledons and primary needles, slowed expansion of primary needles, inhibited dry weight increment of both cotyledons and primary needles, and induced necrosis of tips of cotyledons and primary needles. Growth of seedlings was inhibited more by increasing the duration of exposure to SO/sub 2/ than by increasing SO/sub 2/ concentration. The extreme sensitivity to SO/sub 2/ of pine seedlings in the cotyledon stage suggests that their exposure to continuous fumigation in the field, even at low dosages, may adversely influence seedling development and regeneration of pine communities.

• OSTI ID: 7139521
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 5:2; ISSN JEVQA
• 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.
AIR POLLUTION
BIOLOGICAL EFFECTS
BIOMASS
CHALCOGENIDES
CONIFERS
DISEASES
ENERGY SOURCES
GROWTH
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
PINES
PLANT GROWTH
PLANTS
POLLUTION
RENEWABLE ENERGY SOURCES
REVEGETATION
SEEDLINGS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TREES