Influence of certain herbicides and a forest fertilizer on the nitrogen fixation by the lichen Peltigera praetextata
Citation
Lars Hallbom, and Birgitta Bergman, Influence of certain herbicides and a forest fertilizer on the nitrogen fixation by the lichen Peltigera praetextata: .
Summary
Effects of herbicides (Garlone 3A, MCPA, 2,4-D and Krenite) and nitrogen fertilizer (NH4NO3), commonly used in Swedish forestry, on nitrogen fixation (C2H2-reduction) by Peltigera praetextata (Sommerf.) Zopf. (field and laboratory) and its phycobiont Nostoc sp. (laboratory) were studied. The alga was affected by the herbicides 2,4-D and Krenite and the fertilizer, with a decrease in nitrogenase activity. Nitrogen fixation by the lichen was not affected by herbicides but treatment with NH4NO3 led to depression of nitrogenase activity and serious disturbance of the symbiosis, the latter effect due to the fertilizer's lethal effects on the mycobiont (electron microscopy). Published in Oecologia, volume 40, issue 1, on pages 19 - 27, in [...]
Summary
Effects of herbicides (Garlone 3A, MCPA, 2,4-D and Krenite) and nitrogen
fertilizer (NH4NO3), commonly used in Swedish forestry, on nitrogen
fixation (C2H2-reduction) by Peltigera praetextata (Sommerf.) Zopf.
(field and laboratory) and its phycobiont Nostoc sp. (laboratory) were
studied. The alga was affected by the herbicides 2,4-D and Krenite and
the fertilizer, with a decrease in nitrogenase activity. Nitrogen
fixation by the lichen was not affected by herbicides but treatment with
NH4NO3 led to depression of nitrogenase activity and serious disturbance
of the symbiosis, the latter effect due to the fertilizer's lethal
effects on the mycobiont (electron microscopy). Published in Oecologia,
volume 40, issue 1, on pages 19 - 27, in 1979.