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The relation of H 2 S release to SO 2 , fumigation of lichens
Author(s) -
GRIES CORINNA,
ROMAGNI JOANNE G.,
NASH THOMAS H.,
KUHN UWE,
KESSELMEIER JÜRGEN
Publication year - 1997
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1046/j.1469-8137.1997.00775.x
Subject(s) - fumigation , lichen , chemistry , botany , photosynthesis , environmental chemistry , horticulture , biology
SUMMARY Hydrogen sulphide emission in lichens as a response to low concentration SO 2 , fumigation was investigated. In an open flow‐through system several lichen species were fumigated with 36 ppb SO 2 , Two species were also fumigated with higher concentrations (72, 119, 122 and 198 ppb SO 2 ,). Hydrogen sulphide emission was monitored concurrently by cryogenic trapping and analysis with gas chromatography. All tested species increased H, S emission significantly in response to fumigation with 36 ppb SO 2 . Parmelina tiliacea (L.) Hale and Cladina rangiferina (L.) Wigg. released significantly more H 2 S (0.098±0.015 and 0.073±0.013 pmol H 2 S g −1 d. wt s −1 , respectively) than Parmelina quercina (Ach.) Hale, Ramalina menziesii Tayl. and Parmelia sulcata Tayl. (0.028 ± 0.01, 0.025±0.014 and 0.023±0.013 pmol H 2 S g −1 d. wt s −1 , respectively). Release of H 2 S in Hypogymnia physodes was enhanced by increasing SO 2 concentrations up to 72 ppb SO 2 . No significant difference in H 2 S emission in the dark vs. in the light was found. Generally, no correlation was found between photosynthetic activity and H 2 S emission for the tested species. Uptake of SO 2 was similar for all species, at 24.7 ± 5.6 pmol SO 2 g −1 d. wt s −1 in 36 ppb SO 2 and increasing at greater SO 2 concentrations. Therefore, H 2 S‐S release represents only 0.11–0.74% of SO 2 ‐S uptake.