Katalog - Lichenological literature

38016

Reed S.C., Delgado-Baquerizo M. & Ferrenberg S. (2019): Biocrust science and global change, New Phytologist, 223(3): 1047-1051

biocrusts, biological soil crusts, bryophytes, climate, cyanobacteria, global environmental change, lichens, Virtual Issue Read more...

38015

Sichaem J., Nguyen H.-. & Duong T.-. (2019): Hopane-6α,16α,22-triol: A new hopane triterpenoid from the lichen Parmotrema sancti-angelii, Natural Product Communications, 14(6): 1-4

A new compound, namely hopane-6α,16α,22-triol (1), along with 8 known compounds 2 to 9, leucotylin (2), 16β-acetoxy-hopane-6α,22-diol (3), 6α-acetoxyhopane-16β,22-diol (4), zeorin (5), 6α-acetoxyhopane-22-ol (6), ergosterol peroxide (7), brassicasterol (8), and atranorin (9), was isolated from the lichen Parmotrema sancti-angelii. The structures of all the isolated compounds 1 to 9 were fully characterized using spectroscopic data, as well as comparison with the previous literature data. Moreover, … Read more...

38014

Gauslaa Y., Bartemucci P. & Solhaug K.A. (2019): Forest edge-induced damage of cephalo- and cyanolichens in northern temperate rainforests of British Columbia, Canadian Journal of Forest Research, 49(5): 434-439

Retention of trees after logging is a method of preserving epiphytic lichens; however, epiphytes’ responses to logging disturbance are insufficiently known. We aimed to characterize four viability measures — effective PSII yield (Φ PSII ; a proxy for photosynthesis), maximal photosystem II efficiency (F V /F M ; a proxy for photoinhibition), chlorophyll a content, and chlorophyll a/b ratio — and the functional parameter specific thallus mass (STM; a proxy for water storage) in sympatric populations … Read more...

38013

Kushnevskaya E.V., Borovichev E.A. & Shorokhova E.V. (2019): Dependence of epixyiic species on substrate in old-growth spruce forest in Krvach Nature Reserve, Russian Journal of Forest Science, 2019(3): 228-240

Substrate specialization of species in epixyiic communities was studied in old-growth blueberry spruce forests of middle taiga in Kivach Nature Reserve in 2015-2016. The substrate specialization of the species and the systematic groups was analyzed with normalized index of specialization based on occurrence. Tree species, age of dieback, level of decomposition of timber, diameter and height of dead trunks above surface, amount of litter on trunk, bark coverage, moisture content and pH of bark were … Read more...

38012

Miyazawa K., Ohmura Y. & Yamaoka Y. (2020): Aulaxina microphana (Graphidaceae, Lichenized Ascomycota), new to Japan, Journal of Japanese Botany, 95(3): 154-157

Aulaxina microphana (Vain.) R. Sant., a foliicolous lichen, is reported as new to Japan. It was found on a leaf of Arenga engleriBecc., an evergreen palm, at an elevation of 70 m on Iriomote-jima Island in the southwestern end of Japan, which has a subtropical oceanic climate. Read more...

38011

Romero A.L.N., Moratta M.A.H., Carretero E.M., Rodriguez R.A. & Vento B. (2020): Spatial distribution of biological soil crusts along an aridity gradient in the central-west of Argentina, Journal of Arid Environments, 176: 104099

Biocrusts presented their highest expression in the inter-patches. However, an increase in the level of aridity along the landscape could lead to vascular plants to make a notable influence on the spatial distribution of biocrusts. Our objective was to determine the spatial variation of the vascular plant interactions with biocrusts, and the individual variations of biocrusts and each of its components along a gradient of aridity in Argentina. We worked on three sites following a semiarid-arid-hyperarid … Read more...

38010

Pyrczak-Felczykowska A., Narlawar R., Pawlik A., Guzow-Krzemińska B., Artymiuk D., Hać A., Ryś K., Rendina L.M., Reekie T.A., Herman-Antosiewicz A. & Kassiou M. (2019): Synthesis of usnic acid derivatives and evaluation of their antiproliferative activity against cancer cells, Journal of Natural Products, 82(7): 1768-1778

Usnic acid is a secondary metabolite abundantly found in lichens, for which promising cytotoxic and antitumor potential has been shown. However, knowledge concerning activities of its derivatives is limited. Herein, a series of usnic acid derivatives were synthesized and their antiproliferative potency against cancer cells of different origin was assessed. Some of the synthesized compounds were more active than usnic acid. Compounds 2a and 2b inhibited survival of all tested cancer cell lines in … Read more...

38009

Sidondi L., Odendaal J. P., Walker D. R. & Paulse A. N. (2019): The impact of urban pollution on metal contamination of selected forest pockets in Cape Town, South Africa, Environmental Science and Pollution Research, 26(12): 12537–12549

Urban forests are exposed to metals, such as manganese, copper, and zinc in the atmosphere that originate from anthropogenic activities, that include vehicle-related traffic, industries, construction sites, fossil fuel burning for heating and cooking purposes, and resuspension processes related to urban surfaces. Not only is the rich biodiversity of plant and animal species in forests under threat, but so are the biodiversity of soil, sustaining ecosystem functions, as well as human health. The objective … Read more...

38008

Diederich P., Millanes A.M., Coppins B.J. & Wedin M. (2020): Tremella imshaugiae and T. tubulosae (Tremellomycetes, Basidiomycota), two new lichenicolous fungi on Imshaugia aleurites and Hypogymnia tubulosa, Bulletin de la Société des naturalistes luxembourgeois, 122: 239-246

The new Tremella imshaugiae, lichenicolous on Imshaugia aleurites, is described from Scotland and Maine (USA); it is characterized by small, 0.1–1 mm diam., amber coloured basidiomata not inducing gall-formation, 2–4-celled, mainly longitudinally septate basidia, 15.5–21.5 × 13–16.5 μm, and relatively large, subspherical basidiospores, 6.5–9 × 6.5–8.5 μm; it is sister to T. diploschistina in a phylogeny using ITS and nLSU markers. The new Tremella tubulosae, lichenicolous on Hypogymnia … Read more...

38007

Kumar K., Mishra J.P.N. & Singh R.P. (2020): Usnic acid induces apoptosis in human gastric cancer cells through ROS generation and DNA damage and causes up-regulation of DNA-PKcs and γ-H2A.X phosphorylation, Chemico-Biological Interactions, 315: 108898

Usnic acid, a dibenzofuran derivative found in many lichen species, is reported to have anticancer activity against human gastric cancer. We investigated the molecular alterations associated with anticancer effects of usnic acid against human gastric adenocarcinoma AGS and gastric carcinoma SNU-1 cells. Usnic acid (10–25 μM) treatment to these cells caused a significant increase in mitochondrial membrane depolarization and apoptotic cells. Apoptosis induction was accompanied by an increase in … Read more...