Effects of sulfur dioxide on net photosynthesis, respiration, and chlorophyll content in lichen thalli and cultured lichen symbionts
Experiments were performed to study the sensitivity of lichens to the effects of sulfur dioxide with emphasis on the metabolic processes that are affected. Sulfur dioxide was found to alter the photosynthetic and respiratory rates of lichens and cultured lichen symbionts. Net photosynthesis and respiration were drastically reduced in cultured phyoobionts and respiration was markedly decreased in cultured mycobionts. Responses were measured in the mycobionts at lower concentrations of sulfur dioxide than in the phycobionts. The mycobiont of a pollution sensitive lichen appeared to be affected to a greater extent than mycobionts from pollution tolerant lichens. Chlorophyll degradation was not present in exposed phycobionts.
- OSTI ID:
- 6446958
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AIR POLLUTION
BIOLOGICAL INDICATORS
LICHENS
SENSITIVITY
PHOTOSYNTHESIS
INHIBITION
RESPIRATION
SULFUR DIOXIDE
BIOLOGICAL EFFECTS
CELL CULTURES
CHLOROPHYLL
ECOLOGICAL CONCENTRATION
METABOLISM
ALGAE
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
FUNGI
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHYTOCHROMES
PIGMENTS
PLANTS
POLLUTION
PORPHYRINS
SULFUR COMPOUNDS
SULFUR OXIDES
SYNTHESIS
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)