Katalog - Lichenological literature

2320

Braun U. (2003): Miscellaneous notes on some cercosporoid hyphomycetes, Bibl. Lichenol., 86: 79-98

The new species Passalora amazonica, Pseudocercospora euphorbiacearum, P. feigenana, P. graphioides, P. ficina and Stenella are described and the new combinations Cladosporium cheonis, Passalora P. Pseudocercospora amonifolii, P. ilicis and P.pulvinula are introduced. Cercospora cluytiae, C. mucunicola and C. panacis are re-described and their taxonomic positions are discussed Read more...

2319

Aptroot A., Lücking R. (2003): Phenotype-based phylogenetic analysis does not support generic separation of Gyalidea and Solorinella (Ostropales: Asterothyriaceae), Bibl. Lichenol., 86: 53-78

We performed a phylogenetic analysis of the lichen family Asterothyriaceae, using morphological, anatomical, and ontogenetic data. The results support generic status of Psoro- theciopsis and Asterothyrium in their current circumscription, while Gyalidea becomes para- or possibly polyphyletic when including G. epiphylla and G. phyllophila and excluding the monospecific Solorinella as a separate genus. Gyalidea epiphylla and G. phyllophila appear isolated from the remainder of the genus on a clade … Read more...

2318

Leuckert C. & Hertel H. (2003): On the Lecidea atrobrunnea complex (Lecanorales, Lecideaceae) in the Americas. I. Introduction and chemistry, Bibliotheca Lichenologica, 86: 13-31

The lichen chemistry of some 860 mainly North American specimens of Lecidea atrobrunnea (Lam. & DC.) Schaer. sensu lato (inch L. placodiiformis Hue, L. protabacina Nyl., L. subfumosa (Arnold) Zwackh, L. syncarpa Zahlbr.) was studied. Diagnostically significant lichen substances are p-depsides of the orcinol-type with long aliphatic side-chains, depsidones of the ß-orcinol type, and dibenzofurans. 15 different chemotypes are distinguished. Beside 8 single-syndrome chemotypes 6 complex chemotypes … Read more...

2317

Obermayer W. & Elix J.A. (2003): Notes on chemical races in Sulcaria sulcata from southeastern Tibet and adjacent regions, Bibliotheca Lichenologica, 86: 33–46

More than 200 thalli of Sulcaria sulcata (lichenized Ascomycotina) from southeastern Tibet and adjacent regions have been analyzed chemically. Six major chemical races were detected, characterized by the occurrence of the following major compounds: psoromic acid (chemical race 1a), 2-methoxypsoromic acid (2a), 2-hydroxyvirensic acid (3a; often in combination with 2-hydroxyconvirensic acid), virensic acid (3b), and vulpinic acid, the latter in combination with either psoromic acid (1b) or 2-methoxypsoromic … Read more...

2316

Huneck S. (2003): Die wasserabweisende Eigenschaft von Flechtenstoffen, Bibl. Lichenol., 86: 9-12

The hydrophobic property of 37 lichen substances (depsidones, depsides, pulvin lactones, depsones, triterpenes, dibenzofuranes, cycloaliphatics, aliphatic lactones, aliphatic acids, diterpenes, monocyclic aromatics, chromones, xanthones, and anthraquinones) has been compared by a simple test. Most hydrophobic metabolites are depsides and depsidones with n-pentyl side chains Read more...

2315

Elix J. A., Giralt M., Wardlaw J. H. (2003): New chloro-depsides from the lichen Dimelaena radiata, Bibl. Lichenol., 86: 1-7

The new depsides 3-chlorolecanoric acid (1), 3-chloronordivaricatic acid (2), 3- chlorosubdivaricatic acid (3).and 3-chloroisosubdivaricatic acid'(4) have been detected in the lichen Dimelaena radiata and the structure of these metabolites has been established by unambiguous synthesis. The chromatographic and spectroscopic properties of the new depsides are described Read more...

2314

Follmann G. (1997): Hubbsia langei, a new Roccellaceae from the Atacama Desert, north Chile, and the identity of two Reinkella species, Bibl. Lichenol., 67: 11-24

Reinkella lirellina from Peru and R. parishii from California (Roccellaceae) are revised, resulting in the new combinations Roccella lirellina and Hubbsia parishii, respectively. In addition, a new species, H. langei, is described from the loma formations of the Atacama Desert, North Chile, distinguished by secondarily lobate branches, highly variable, roundish to lirellate as- cocarps, and an unusual chemosyndrome with psoromic and conpsoromic acids as main secondary products. The chorological, … Read more...

2313

Seaward M.R.D. (1997): Urban deserts bloom: a lichen renaissance, Bibliotheca Lichenologica, 67: 297-309

The improvement in lichen floras in recent years as a consequence of clean air legislation has been demonstrated in many cities. It is apparent from such studies that re-establishing lichen floras differ from those formerly wiped out by air pollution. Work in the West Yorkshire conurbation, U.K. over the past 30 years has documented the distributional and ecological responses of lichens to qualitative and quantitative changes in air pollution. From these longterm data, it has been possible to model … Read more...

2312

Brown D. & Mahmood S. (1997): Does ion loss from lichens reliably measure membrane damage?, Bibl. Lichenol., 67: 255-264

Increases in metal element concentrations in the water washings from lichens previously subjected to stress are often used as a measure of membrane damage. Experiments involving the release of elements from discs of Pel tigern horizontalis, exposed to either desiccation or heavy metal stress, are used to test the validity of this approach. A sequential elution procedure can be used to assay the actual losses from the intracellular fraction. The importance of knowing the proportion of the elements … Read more...

2311

Jensen M., Feige G. B., Kuffer M. (1997): The effect of short-time heating on wet Lobaria pulmonaria: a chlorophyll fluorescence study, Bibl. Lichenol., 67: 247-254

Wet thalli of Lobaria pulmonaria collected in La Palma (Canary Islands) were exposed to high temperatures (22°- 44°C). They were heated in the dark either in a wet atmosphere (20 min) or in a water bath (submerged for 5 min). After cooling photosynthetic parameters were determined. The chlorophyll fluorescence parameters Fv/Fm (potential electron transfer in photosystem II), AF/Fm’ (- apparent electron transport rate). qP (photochemical quench) and photosynthetic CL-evolution rate strongly declined … Read more...