Histological changes induced in scotch pine needles by sulfur dioxide
Journal Article
·
· Phytopathology; (United States)
Scotch pine cotyledons, primary needles, and secondary needles of various ages were exposed to 2620 ..mu..g/m/sup 3/ (1.0 ppm) SO/sub 2/ for 1, 3, or 5 hr. Needles from unexposed (control) and exposed plants were embedded in paraffin, sectioned, stained, and examined under a light microscope. Mesophyll collapse was the most common structural change induced by SO/sub 2/ in all three needle types. Resin canal occlusion also was observed in primary and secondary needles exposed to SO/sub 2/. Increased dosages of SO/sub 2/ did not induce additional symptoms but intensified those already present.
- Research Organization:
- Pennsylvania State Univ., University Park
- OSTI ID:
- 5862933
- Journal Information:
- Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 68:12; ISSN PHYTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
500200 -- Environment
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.
BIOLOGICAL EFFECTS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
CONIFERS
DOSE-RESPONSE RELATIONSHIPS
INJURIES
LEAVES
OXIDES
OXYGEN COMPOUNDS
PINES
PLANTS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TREES
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.
BIOLOGICAL EFFECTS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
CONIFERS
DOSE-RESPONSE RELATIONSHIPS
INJURIES
LEAVES
OXIDES
OXYGEN COMPOUNDS
PINES
PLANTS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TREES