Katalog - Lichenological literature

37323

Chang W., Zhang M., Jin X., Zhang H., Zheng H., Zheng S., Qiao Y., Yu H., Sun B., Hou X. & Lou H. (2022): Inhibition of fungal pathogenicity by targeting the H2S-synthesizing enzyme cystathionine β-synthase, Science Advances, 8(50): eadd5366

The global emergence of antifungal resistance threatens the limited arsenal of available treatments and emphasizes the urgent need for alternative antifungal agents. Targeting fungal pathogenic functions is an appealing alternative therapeutic strategy. Here, we show that cystathionine β-synthase (CBS), compared with cystathionine γ-lyase, is the major enzyme that synthesizes hydrogen sulfide in the pathogenic fungus Candida albicans. Deletion of CBS leads to deficiencies in resistance to oxidative … Read more...

37324

Ferron S., Jéhan P., Guillory X. & Uriac P. (2022): Intramolecular transesterification of depsides yields fluorescent 1H-isochromen-1-ones: Application as a chemical probe for lichen determination, Phytochemistry, 198: 113139

The reactivity of eight purified depsides obtained from six european lichens and that display as 2-oxoalkyl chain in ortho-position of the ester bond was explored. These depsides were found to lead to 1H-Isochromen-1-ones, which exhibit a distinctive blue fluorescence at 365 nm, in the presence of a 10% aqueous solution of KOH. A mechanistic explanation, involving the formation of an enolate intermediate and intramolecular transesterification, was proposed and validated by DFT. By exploiting this … Read more...

37325

Graber A. & Santi P. (2022): Inferring rockfall frequency-magnitude relationships and talus accumulation times from lichenometric study of talus deposits, Glenwood Canyon, CO, USA, GEOMORPHOLOGY, 408: 108253

Rockfall is a frequent hazard in mountainous areas of the world. Rockfall hazard assessment and mitigation design typically require design volumes of blocks and design frequencies of events. However, constraining the frequency of rockfall is challenging due to limited data, limited timespans of data collection, and difficulty of estimating dates for past rockfalls. This paper presents a study of rockfall frequency from natural rock slopes in Glenwood Canyon, Colorado using lichenometry measurements … Read more...

37326

Munger I.A., Baugh M., Henrie J.R., Hollinger J., Crepeau R. & Leavitt S.D. (2022): Integrative Biodiversity Inventories: Characterizing Lichen-Forming Fungal Diversity in Glen Canyon National Recreation Area Using DNA Barcoding and Vouchered Specimens, Western North American Naturalist, 82: 213 - 233

The Colorado River and its tributaries on the Colorado Plateau are home to unique desert river ecosystems and changing environmental conditions. Within this region, the Glen Canyon National Recreation Area (GCNRA) is composed of rugged, high desert terrain and is managed by the United States National Park Service as both a recreational and conservation area. Despite the ecological and economic importance of GCNRA, significant components of the ecological communities therein remain poorly characterized, … Read more...

37327

Yu S. & Zhu C. (2022): Inverse modeling of lichen growth curves and implications for lichenometric dating, Quaternary Geochronology, 69: 101257

Lichenometric dating represents a quick and affordable surface exposure dating method that has been widely used to provide a minimum age constraint on tectonic and geomorphic landscape changes as well as buildings and anthropogenic landscape changes in various settings during the late Holocene. Despite its widespread usage, this method has several limitations. Major problems relate to the sampling of lichen population on any given rock surface and the modeling of growth curves. In order to overcome … Read more...

37328

Taghiyeva A. T., Tufan Dülger A. F., Yörük E., Aslan Engin T. (2022): Investigation of the antifungal activity of lichen (Usnea longissima) extracts against Fusarium graminearum, Anatolian Journal of Botany, 6(2): 104-108

The aim of this study was to investigate the antifungal effects and molecular changes caused by Usnea longissima Ach. extracts against Fusarium graminearum. In agar well diffusion assay, the zone of inhibition increased as the concentration increased in both methanol and acetone extracts (1, 10, 20, and 50 mg/ml). In terms of bioactivities, 1 mg/ml was active, while other concentrations were very active. At the molecular level, changes caused by 50 mg/ml methanol extract were analyzed by qPCR in … Read more...

37331

John V. & Villaumé A. (2022): La flore lichénologique des réserves naturelles nationales de Neuhof / Illkirch, de l’Ile du Rohrschollen et de la Forêt de la Robertsau (Strasbourg, Bas-Rhin), Les Nouvelles archives de la Flore jurassienne et du nord-est de la France, 19: 101-116

This article presents the results of a lichenological survey conducted in 2019 on the Neuhof/Illkirch, Rohrschollen, and Robertsau-Wantzenau National Nature Reserves. A total of 176 species were identified (167 lichens, seven lichenicolous fungi, and two fungi closely related to lichens). This study was carried out for the City of Strasbourg, which manages the three sites, as part of the update of data for the Natura 2000 site Rhin Ried Bruch de l'Andlau. The three reserves are very similar in terms … Read more...

37332

Palmer B. (2022): Learning about resilience from biological soil crusts, Bulletin of the California Lichen Society, 28(2): 64-68

research on soil crusts Read more...

37334

Koval Y.N. (2022): Lichen indication of surface air pollution in CATE Zheleznogorsk, IOP Conference Series: Earth and Environmental Science, 979(1): 012113

The article focuses on evaluation of the level of air pollution in the forest territories surrounding the cityborders, using lichen indication. The novelty of the study lies in the fact that earlier this territory was not described for the quality of the surface air. The author notes that this area is exposed to recreational impact. The population living near these forests visit green areas, but do not have up-to-date data on the level of air pollution. According to the results of the study, we discovered … Read more...

37335

Mežaka A., Salazar Allen N., Mendieta-Leiva G. & Bader M.Y. (2022): Life on a leaf: The development of spatial structure in epiphyll communities, Journal of Ecology, 110(3): 619-630

Abstract The spatial structure of biotic communities can be shaped by niche-based or stochastic processes, and the importance of both can change through time. Niche-based processes include neighbour interactions, which can change in intensity and quality as communities develop in dependence of environmental conditions. Epiphylls, miniature communities of liverworts, lichens, algae and fungi on leaves, develop only in relatively moist forests, but their leaf-surface habitat is still characterized … Read more...