Katalog - Lichenological literature

33489

Krajka‑Kuźniak V., Paluszczak J., Kleszcz R. & Baer‑Dubowska W. (2021): (+)‑Usnic acid modulates the Nrf2‑ARE pathway in FaDu hypopharyngeal carcinoma cells, Molecular and Cellular Biochemistry, 476: 2539–2549

Naturally occurring phytochemicals of different origin and structure, arctigenin, bergenin, usnic acid and xanthohumol, were shown to affect Nrf2 pathway in the context of various diseases, but their effect on this pathway in cancer cells was not extensively investigated. This study aimed to evaluate the effect of these compounds on Nrf2 expression and activation in hypopharyngeal FaDu squamous cell carcinoma cells. FaDu cells were treated with 2 or 10 μM arctigenin, bergenin, (+)- usnic acid … Read more...

33490

Sinyutkina A. (2021): Drainage consequences and self-restoration of drained raised bogs in the south-eastern part of Western Siberia: Peat accumulation and vegetation dynamics, Catena, 205: 105464 [17 p.]

This study analysed the drainage influence on vegetation and peat deposit and assessed the self-restoration of ecological functions of Western Siberia bogs. As a case study, we selected four raised bogs – two are the eastnorthern spurs of the Great Vasyugan Mire and two are small, raised bogs on the terrace of the Bakchar River and the Ob River. The consequences of drainage and the ability to self-restore are influenced by the moisture conditions before drainage, bog size, distance between … Read more...

33491

Nirhamo A., Pykälä J., Halme P. & Komonen A. (2021): Lichen communities on Populus tremula are affected by the density of Picea abies, Applied Vegetation Science, 24(2): e12584 [9 p.]

Questions: Aspen (Populus tremula) is declining in the old-growth forests of boreal Fennoscandia. This threatens the numerous taxa that are dependent on old aspens, including many epiphytic lichens. Potential methods to aid epiphytic lichens on aspen are centered around treatments which affect the density of Norway spruce (Picea abies). In this study, we investigated how epiphytic lichen communities on aspen are affected by the variation of spruce density in the immediate vicinity of the focal aspen. Location: … Read more...

33498

Frolov I.V., Vondrák J., Konoreva L.A., Chesnokov S.V., Himelbrant D.E., Arup U., Stepanchikova I.S., Prokopiev I.A., Yakovchenko L.S. & Davydov E.A. (2021): Three new species of crustose Teloschistaceae in Siberia and the Far East, Lichenologist, 53(3): 233–243

Three species of the family Teloschistaceae (lichenized Ascomycota) are described as new to science from Southern and Eastern Siberia and the Far East. Corticolous Caloplaca saviczii belongs to the genus Caloplaca s. str.; it has C. cerina-like apothecia and green to grey- green, crateriform soralia with a white rim. Lendemeriella aureopruinosa is a saxicolous taxon with a thin grey thallus and small apothecia 0.3–0.6 mm in diameter, with a dark orange disc usually bearing epipsamma and often with … Read more...

33497

Sinigla M., Szurdoki E., Lőkös L., Bartha D., Galambos I., Bidló A. & Farkas E. (2021): Distribution and habitat preference of protected reindeer lichen species (Cladonia arbuscula, C. mitis and C. rangiferina) in the Balaton Uplands (Hungary), Lichenologist, 53(3): 271-282

The maintenance of protected lichen species and their biodiversity in general depends on good management practices based on their dis- tribution and habitat preferences. To date, 10 of the 17 protected lichen species of Hungary have been recorded in the Bakony Mts including the Balaton Uplands region. Habitat preferences of three protected Cladonia species (C. arbuscula, C. mitis and C. rangiferina) growing on underlying rocks of red sandstone, basalt, Pannonian sandstone and gravel were investigated … Read more...

33496

Moyo C., Minibayeva F., Liers C. & Beckett R. (2021): Quinone reductase activity is widespread in lichens, Lichenologist, 53(3): 265-269

In our earlier work, we demonstrated that the oxidases tyrosinase (TYR), laccase (LAC), and a heme peroxidase (POX) occur widely in lichens. Here we report on the occurrence of another oxidoreductase enzyme, quinone reductase (QR) (EC 1.6.5.5). While QR has been reported to occur widely in other organisms, there is currently no information on QR activities in lichens. Here we present a survey of QR activity in 14 species of lichens. Results demonstrate that QR activity is readily detectable in all … Read more...

33495

Mead O.L. & Gueidan C. (2021): Testing carbon and nitrogen sources for the in vitro growth of the model lichenized fungus Endocarpon pusillum Hedw, Lichenologist, 53(3): 257−264

To improve the efficiency of isolating and culturing lichen mycobionts, we performed a growth assay on an Australian strain of the soil-crust lichenized fungus Endocarpon pusillum Hedw. This assay determined the preferred nitrogen and carbon sources of the fungus by limiting the available nitrogen or carbon sources to single compounds found in soils, plants and lichen thalli. We found that the non-proteinaceous amino acid, GABA, produced the most growth of all nutrients when provided as the sole … Read more...

33494

Søchting U., Søgaard M., Sancho L. & Arup U. (2021): The lichen genus Villophora (Teloschistaceae, Ascomycota), Lichenologist, 53(3): 245-255

The Southern Hemisphere lichen genus Villophora in subfamily Teloschistoideae is analyzed based on DNA sequence data. Six species are described, five of which are new to science: V. darwiniana and V. wallaceana grow on lignum and bark in southern Patagonia and Tierra del Fuego; V. onas and V. patagonica are lichenicolous or saxicolous on rocks in southern Patagonia; V. rimicola is saxicolous in Antarctica. Based on a three-gene DNA analysis, Tayloriellina is shown to be closely related to Villophora, … Read more...

33493

Randlane T. & Mark K. (2021): Response to Clerc & Naciri Usnea dasopoga (Ach.) Nyl. and U. barbata (L.) F. H. Wigg. (Ascomycetes, Parmeliaceae) are two different species: A plea for reliable identifications in molecular studies, Lichenologist, 53(3): 231-232

During the last thirty years phylogenetic analyses based on molecular characters have developed from simple single-locus studies into complicated surveys containing multi-locus phyloge- nies, species trees and possibilities to evaluate the evolutionary history of characters. This has been an exciting era for systema- tists, including fungal taxonomists. The majority of lichenized taxa have originally been described using morphological charac- ters s. lat. (i.e. traits related to morphology, anatomy … Read more...

33492

Clerc P. & Naciri Y. (2021): Usnea dasopoga (Ach.) Nyl. and U. barbata (L.) F. H. Wigg. (Ascomycetes, Parmeliaceae) are two different species: A plea for reliable identifications in molecular studies, Lichenologist, 53(3): 221-230

Using molecular data to delimit species or reconstruct their evolutionary history is now widely used across all organisms. However, such analyses can suffer from poor or false specimen identifications leading to incorrect conclusions. Here we show that the use of misidentified specimens in a phylogenetic framework resulted in questionable conclusions in a previously published study (Mark et al. 2016). Using mor- phological, chemical and statistical analyses on the specimens used in that study, we … Read more...