JJH Katalog - Lichenological literature

34533

Zorrilla J.G., D’Addabbo T., Roscetto E., Varriale C., Catania M.R., Zonno M.C., Altomare C., Surico G., Nimis P.L. & Evidente A. (2022): Antibiotic and nematocidal metabolites from two lichen species collected on the Island of Lampedusa (Sicily) - International Journal of Molecular Sciences, 23(15): 8471 [12 p.]

The antibiotic and nematocidal activities of extracts from two coastal lichen species collected on Lampedusa Island (Sicily), Ramalina implexa Nyl. and Roccella phycopsis Ach., were tested. Methyl orsellinate, orcinol, (+)-montagnetol, and for the first time 4-chlororcinol were isolated from Roccella phycopsis. (+)-Usnic acid was obtained from Ramalina implexa. The crude organic extract of both lichen species showed strong antibiotic activity against some bacterial species and nematocidal activity. … Read more...

28409

Zotz G. (2017): Growth of Rhizocarpon geographicum in the summit region of Volcan Barú, Panama - Lichenologist, 49(5): 535–538

The crustose lichens of the genus Rhizocarpon are among the most widely distributed species on rock surfaces worldwide (Armstrong 2011, 2016). Thalli of this species are characterized by yellow-green lichenized areolae on the surface of a non-lichenized fungal hypotha- llus, which forms a dark marginal ring. Rhizocarpon species typically grow very slowly and reach a considerable age, characteristics that have been exploited in numerous studies by earth scientists and archaeologists using these lichens … Read more...

11788

Zotz G. & Bader M.Y. (2008): Epiphytic Plants in a Changing World-Global: Change Effects on Vascular and Non-Vascular Epiphytes - Progress in Botany, 70: 147-170

Abstract: Epiphytes have been called particularly vulnerable to climate change because of their existence at the interface of vegetation and atmosphere. We review the available evidence for this notion and put our analysis into the larger context of human-induced changes in general. Besides climate change, land use changes adversely affect epiphytes, while other factors, e.g. biotic exchange, are of lesser importance in this life form. Both land use change and climate change primarily affect … Read more...

30940

Zotz G. & Winter K. (1994): Photosynthesis and carbon gain of the lichen, Leptogium azureum, in a lowland tropical forest - Flora, 189: 179–186

CO2 gas exchange and microclimatic conditions of Leptogium azureum (Sw. ex Ach.) Mont., a foliose lichen, were investigated in the lowland tropical forest of Barro Colorado Island, Panama. Thalli growing epiphytically in the forest canopy or epilithically on boulders in the understory were studied. Under the prevailing temperature and humidity conditions, thallus water contents were generally high during the night, resulting in high rates of respiration. Daytime net CO2 uptake was restricted by low … Read more...

10151

Zotz G., Schultz S. & Rottenberger S. (2003): Are tropical lowlands a marginal habitat for macrolichens? Evidence from a field study with Parmotrema endosulphureum in Panama - Flora, 198: 71-77

There is a striking increase in the abundance of non-vascular organisms (mosses, liverworts, and macrolichens) with altitude in the tropics. The proposed mechanism behind this altitudinal gradient still awaits experimental verification. This study addresses this question using diel (= 24-h) time courses of CO2 exchange, thallus water relations, and microclimate of the foliose lichen, Parmotrema endosulphureum, under natural tropical lowland conditions. In addition, we studied the responses of … Read more...

25349

Zouaoui S., Boudreault C., Drapeau P. & Bergeron Y. (2014): Influence of time since fire and micro-habitat availability on terricolous lichen communities in black spruce (Picea mariana) boreal forests - Forests, 5(11): 2793-2809

Terricolous lichens are an important component of boreal forest ecosystems, both in terms of function and diversity. In this study, we examined the relative contribution of microhabitat characteristics and time elapsed since the last fire in shaping terricolous lichen assemblages in boreal forests that are frequently affected by severe stand-replacing fires. We sampled 12 stands distributed across five age classes (from 43 to >200 years). In each stand, species cover (%) of all terricolous lichen … Read more...

16387

Zozaya C. & Etayo J. (1995): Líquenes saxícolas y hongos liquenícolas de la Sierra de Ujué (Navarra) - Studia Botanica, 13 [1994]: 263-266

27561

Zraik M., Booth J.T. & Piercey-Normore M.D. (2016): Reports of Cladonia magyarica and C. humilis in Manitoba - Evansia, 33(3): 136–144

The genus Cladonia is widely distributed around the world. Since the section Cladonia contains species complexes that are difficult to distinguish, the distributions of species within these complexes are even less well-known than others. The cup-forming species, Cladonia magyarica, is morphologically similar to C. pyxidata and C. pocillum; and C. humilis is morphologically similar to C. conista and C. chlorophaea. Both species, C. magyarica and C. humilis, have not been previously reported for … Read more...

30441

Zraik M., Booth T. & Piercey-Normore M.D. (2018): Relationship between lichen species composition, secondary metabolites and soil pH, organic matter, and grain characteristics in Manitoba - Botany, 96: 267–279

Many lichen secondary metabolites have functions related to the environmental conditions of lichen habitats but few studies have compared soil characteristics with lichen species composition or their secondary products. The goal of this study was to investigate the relationship between soil characteristics with lichen species composition and secondary metabolites. Five locations were chosen in Manitoba, each with five sites (transects), and each transect with five quadrats (1 m × 1 m). All species … Read more...

28381

Zrnzević I., Stanković M., Jovanović V.S., Mitić V., Đorđević A., Zlatanović I. & Stojanović G. (2017): Ramalina capitata (Ach.) Nyl. acetone extract: HPLC analysis, genotoxicity, cholinesterase, antioxidant and antibacterial activity - EXCLI Journal, 16: 679–687

In the present investigation, effects of Ramalina capitata acetone extract on micronucleus distribution on human lymphocytes, on cholinesterase activity and antioxidant activity (by the CUPRAC method) were examined, for the first time as well as its HPLC profile. Additionally, total phenolic compounds (TPC), antioxidant properties (estimated via DPPH, ABTS and TRP assays) and antibacterial activity were determined. The predominant phenolic compounds in this extract were evernic, everninic and obtusatic … Read more...