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Effects of sulfur dioxide on net CO/sub 2/ assimilation in the lichen Evernia mesomorpha Nyl

Abstract

Physiologically active thalli of the lichen Evernia mesomorpha Nyl. were very sensitive to short-term fumigations with low concentrations of gaseous sulfur dioxide. Net CO/sub 2/ assimilation rate (NAR) was significantly reduced after exposure to 0.085 ..mu..l l/sup -1/ (250 ..mu..g m/sup -3/) SO/sub 2/ for 1 h or more, and the reduction increased with increasing concentration. Duration of exposure had no significant effect on NAR, indicating the importance of rate of SO/sub 2/ uptake rather than the total amount absorbed. Respiration was significantly reduced after 4 h or more of exposure to 0.265 ..mu..l l/sup -1/ (639 ..mu..g m/sup -3/) SO/sub 2/ or higher. Recovery of NAR after fumigation was dependent on both SO/sub 2/ concentration and duration of fumigation, and on the time allowed for recovery. Virtually complete recovery occurred within 24 h after episodes with up to 0.355 ..mu..l l/sup -1/ (856 ..mu..g m/sup -3/) SO/sub 2/ for 1 h and 0.085 ..mu..l l/sup -1/ SO/sub 2/ for 4 h. Above these levels, recovery was incomplete or nonexistent after 24 h in clean air. The level of sensitivity found can be attributed to the environmental conditions during fumigation, which prevented thallus desiccation and inactivity. Based on this study,  More>>
Publication Date:
Jan 01, 1985
Product Type:
Journal Article
Reference Number:
EDB-87-041262
Resource Relation:
Journal Name: New Phytol.; (United Kingdom); Journal Volume: 100
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; AIR POLLUTION; BIOLOGICAL INDICATORS; CARBON DIOXIDE; UPTAKE; LICHENS; CARBON DIOXIDE FIXATION; SENSITIVITY; SULFUR DIOXIDE; BIOLOGICAL EFFECTS; DOSE-RESPONSE RELATIONSHIPS; PHOTOSYNTHESIS; RESPIRATION; ALGAE; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; FUNGI; OXIDES; OXYGEN COMPOUNDS; PHOTOCHEMICAL REACTIONS; PLANTS; POLLUTION; SULFUR COMPOUNDS; SULFUR OXIDES; SYNTHESIS; 560300* - Chemicals Metabolism & Toxicology
OSTI ID:
7117827
Research Organizations:
Northern Forest Research Center, Edmonton, Alberta
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: NEPHA
Submitting Site:
CDIC
Size:
Pages: 643-651
Announcement Date:
Feb 01, 1987

Citation Formats

Huebert, D B, L'Hirondelle, S J, and Addison, P A. Effects of sulfur dioxide on net CO/sub 2/ assimilation in the lichen Evernia mesomorpha Nyl. United Kingdom: N. p., 1985. Web. doi:10.1111/j.1469-8137.1985.tb02809.x.
Huebert, D B, L'Hirondelle, S J, & Addison, P A. Effects of sulfur dioxide on net CO/sub 2/ assimilation in the lichen Evernia mesomorpha Nyl. United Kingdom. doi:10.1111/j.1469-8137.1985.tb02809.x.
Huebert, D B, L'Hirondelle, S J, and Addison, P A. 1985. "Effects of sulfur dioxide on net CO/sub 2/ assimilation in the lichen Evernia mesomorpha Nyl." United Kingdom. doi:10.1111/j.1469-8137.1985.tb02809.x. https://www.osti.gov/servlets/purl/10.1111/j.1469-8137.1985.tb02809.x.
@misc{etde_7117827,
title = {Effects of sulfur dioxide on net CO/sub 2/ assimilation in the lichen Evernia mesomorpha Nyl}
author = {Huebert, D B, L'Hirondelle, S J, and Addison, P A}
abstractNote = {Physiologically active thalli of the lichen Evernia mesomorpha Nyl. were very sensitive to short-term fumigations with low concentrations of gaseous sulfur dioxide. Net CO/sub 2/ assimilation rate (NAR) was significantly reduced after exposure to 0.085 ..mu..l l/sup -1/ (250 ..mu..g m/sup -3/) SO/sub 2/ for 1 h or more, and the reduction increased with increasing concentration. Duration of exposure had no significant effect on NAR, indicating the importance of rate of SO/sub 2/ uptake rather than the total amount absorbed. Respiration was significantly reduced after 4 h or more of exposure to 0.265 ..mu..l l/sup -1/ (639 ..mu..g m/sup -3/) SO/sub 2/ or higher. Recovery of NAR after fumigation was dependent on both SO/sub 2/ concentration and duration of fumigation, and on the time allowed for recovery. Virtually complete recovery occurred within 24 h after episodes with up to 0.355 ..mu..l l/sup -1/ (856 ..mu..g m/sup -3/) SO/sub 2/ for 1 h and 0.085 ..mu..l l/sup -1/ SO/sub 2/ for 4 h. Above these levels, recovery was incomplete or nonexistent after 24 h in clean air. The level of sensitivity found can be attributed to the environmental conditions during fumigation, which prevented thallus desiccation and inactivity. Based on this study, neither the concept of dose (concentration x time) nor that of threshold levels of SO/sub 2/ fumigations are supported. Peak exposures to SO/sub 2/ for short periods may be of primary importance in determining the survival of lichens in industrial areas.}
doi = {10.1111/j.1469-8137.1985.tb02809.x}
journal = {New Phytol.; (United Kingdom)}
volume = {100}
journal type = {AC}
place = {United Kingdom}
year = {1985}
month = {Jan}
}