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PHYSIOLOGICAL–ENVIRONMENTAL INTERACTIONS IN LICHENS
Author(s) -
BROWN D.,
MACFARLANE J. D.,
KERSHAW K. A.
Publication year - 1983
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 - 10.1111/j.1469-8137.1983.tb03428.x
Subject(s) - respiration , wetting , lichen , oxygen , botany , chemistry , biology , materials science , composite material , organic chemistry
SUMMARY The wetting burst, resaturation respiration and basal respiration in Peltigera polydactyla, P. praetextata and Nostoc commune has been examined using both infrared gas analysis and oxygen electrodes. The physical nature of the wetting burst is further confirmed by drying replicates in CO 2 ‐free air, after which the burst is eliminated. The data also shows that resaturation respiration is very dependent on prior events in the field. A prior fast drying rate produces higher resaturation respiration rates than does slow drying. However the length of time a lichen remains fully saturated is largely responsible for the amplitude of resaturation respiration and induces a very evident seasonal component in P. polydactyla. The extent of carbon loss and its potential ecological impact is questioned.