Effects of SO/sub 2/ fumigation on net photosynthesis of Douglas fir
Book
·
OSTI ID:6546990
Sulfur dioxide affected net assimilation in three-year-old Douglas fir seedlings by causing an increase in assimilatory rate during the time of fumigation and a subsequent decline in rate. Thus, SO/sub 2/ may act as a limiting factor in primary production of Douglas fir where pollution levels are lower than 1 ppm SO/sub 2/. Single short term fumigations were shown to have deleterious effects that were measurable for up to one month. Respiration appeared to be unaffected by SO/sub 2/ fumigation. Increased net photosynthesis during fumigation is believed to be a function of decreased total leaf resistance due to increased stomatal aperture.
- OSTI ID:
- 6546990
- Country of Publication:
- United States
- Language:
- English
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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
CHALCOGENIDES
CHEMICAL REACTIONS
CONIFERS
GROWTH
INHIBITION
METABOLISM
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PINES
PLANTS
POLLUTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SYNTHESIS
TREES
VARIATIONS
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CONIFERS
GROWTH
INHIBITION
METABOLISM
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PINES
PLANTS
POLLUTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SYNTHESIS
TREES
VARIATIONS