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A PROCEDURE FOR THE SIMULTANEOUS MEASUREMENT OF NET CO 2 ‐EXCHANGE AND NITROGENASE ACTIVITY IN LICHENS
Author(s) -
CRITTENDEN P. D.,
KERSHAW K. A.
Publication year - 1978
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.1469-8137.1978.tb01573.x
Subject(s) - thallus , nitrogenase , lichen , acetylene , chemistry , ethylene , botany , environmental chemistry , biology , nitrogen fixation , nitrogen , biochemistry , organic chemistry , catalysis
SUMMARY A sensitive and rapid procedure is described for the simultaneous measurement of mean rates of net CO 2 ‐exchange and nitrogenase activity (acetylene reduction) in cyanophilic lichens. It involves a reaction gas chromatographic technique for the determination of CO 2 and ethylene. Data on concurrent rates of net CO 2 ‐exchange and nitrogenase activity in Peltigera canina (L.) Willd. var. praetextata (Florke em. Sommerf.) Hue and Stereocaulon paschale (L.) Hoffm. at different levels of thallus water content are presented in order to illustrate the application of the new method.