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Identification of lichen substances by a standardized high-performance liquid chromatographic method
Abstract A method for the identification of secondary aromatic lichen substances using high-performance liquid chromatography (HPLC) with reversed-phase columns, gradient elution and benzoic andExpand
Measurements of bark pH with a modified flathead electrode
TLDR
The question arises as to the relevance of such pH-measurements in relation to ecological factors affecting lichen vegetation as the long duration of the measurement process remains a drawback. Expand
Osmotic and Atmospheric Dehydration Effects in the Lichens Hypogymnia Physodes, Lobaria Pulmonaria, and Peltigera Aphthosa: An in vivo Study of the Chlorophyll Fluorescence Induction
TLDR
Inactivation of photosynthesis during atmospheric and osmotic dehydration was monitored by measurement of chlorophyll fluorescence induction (OIP-phase, Kautsky-curves) in three lichen species, finding that at very low water potentials, the decrease in F0 probably monitors changes in the organization of the antenna apparatus of PS2. Expand
TRANSPORT OF PHOTOASSIMILATES IN YOUNG TREES OF FRAXINUS AND SORBUS : MEASUREMENT OF TRANSLOCATION IN VIVO
TLDR
Translocation of photoassimilates was studied on 2-year-old trees of Fraxinus excelsior and Sorbus aucuparia using the short-lived isotope 11C to find out how the two tree species translocate different carbohydrates and show remarkable differences in the ultrastructure of their vascular systems. Expand
Unusual carbohydrate pattern in Trentepohlia species
TLDR
Four Trentepohlia species and the related Cephaleuros virescens photosynthesize and accumulate mannitol, arabinitol, erythritol and glycerol, while Trentepohliales spp. Expand
THE EFFECT OF AGRONOMIC PHOTOSYSTEM-II HERBICIDES ON LICHENS
TLDR
There is no particular sensitivity of green algal lichen photobionts to photosytem II herbicides as compared to other algae, higher plant chloroplasts or protoplasts, and damage to lichens from the use of photosystem-II herbicides in agriculture is probably only of very local occurence. Expand
A Revision of the Usnic Acid Containing Taxa Belonging to Lecanora sensu stricto (Lecanorales: Lichenized Ascomycotina)
TLDR
It is concluded that the usnic acid containing species of Lecanora do not form a natural group and cannot be separated from the group. Expand
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