Katalog - Lichenological literature

34643

Ureña-Vacas I., González-Burgos E., Divakar P.K. & Gómez-Serranillos M.P. (2022): Lichen extracts from cetrarioid clade provide neuroprotection against hydrogen peroxide-induced oxidative stress, Molecules, 27(19): 6520 [16 p.]

Oxidative stress is involved in the pathophysiology of many neurodegenerative diseases. Lichens have antioxidant properties attributed to their own secondary metabolites with phenol groups. Very few studies delve into the protective capacity of lichens based on their antioxidant properties and their action mechanism. The present study evaluates the neuroprotective role of Dactylina arctica, Nephromopsis stracheyi, Tuckermannopsis americana and Vulpicida pinastri methanol extracts in a hydrogen peroxide … Read more...

34644

Valenzuela C., Leiva D., Carú M. & Orlando J. (2022): Prediction of the metabolic functions of nitrogen, phosphorus, and sulfur cycling bacteria associated with the lichen Peltigera frigida, Microbiology, 91(5): 604–610

Lichens are currently interpreted as complex self-sustaining ecosystems formed by the interaction of the primary symbionts and other microorganisms. These microorganisms, which colonize the surface of lichen thalli, could be crucial actors in nutrient cycling. Here, we used PICRUSt2 to predict and compare the potential functions of bacteria closely associated with Peltigera frigida thalli and their substrates. We found that these bacteria could potentially transform organic and inorganic molecules … Read more...

34645

Mikhailova I.N. (2022): Dynamics of distribution boundaries of epiphytic macrolichens after reduction of emissions from a copper smelter, Russian Journal of Ecology, 53(5): 335–346

[English translation of Russian Text published in Ekologiya, 2022, No. 5, pp. 321–333] Natural recovery of forest ecosystems after the termination of impacts caused by emissions from large industrial enterprises gives a clue to their sustainability mechanisms. However, the lack of data on dif- ferent ecosystem components, natural zones, and emission sources makes it impossible to identify general patterns of restorative successions. This paper examines the distribution and abundance dynamics … Read more...

34646

Yarzábal L.A., Buela L., de los Ríos A., Peláez D., Romero M., Espinoza F., Torres A.S., Medina G.M., Landi J.G. & Tapia M.V. (2022): Biological deterioration of an Inca monument at high altitude in the Andean range: A case study from Ingapirca’s Temple of the Sun (Ecuador), Heritage, 5(3): 2504–2518

Scientific studies concerning the causes and consequences of the biodeterioration of stone monuments located at high altitudes in permanently cold, mountainous regions are scarce. For that reason, this study aimed to detect and identify the bacteria involved in the deterioration of this type of monument. To achieve this goal, we focused on the most important archeological Inca site in the Ecuadorian Andes: Ingapirca’s Temple of the Sun, built approximately 500 years ago at 3.100 m.a.s.l. We first … Read more...

34647

Allen J.L. & McMullin R.T. (2022): Assessing identification accuracy of research grade iNaturalist observations in lichens and other taxonomically difficult organisms, Biodiversity Information Science and Standards, 6: e95689 [2 p.]

Conference abstract Read more...

34648

Lendemer J.C. (2022): Recent literature on lichens—266, Bryologist, 125(3): 501–504

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34649

Duong T.-H., Nguyen V.-K., Sichaem J., Tran T.-N., Do T.-H., Pham N.-K.-T., Nguyen T.-A.-T., Nguyen T.-H.-T., Mai D.-T., Nguyen N.-H. & Huynh B.-L.-C. (2022): Reticulatin, a novel C43-spiroterpenoid from the lichen Parmotrema reticulatum growing in Vietnam, Natural Product Research, 36(14): 3705–3712

A novel C43-spiroterpenoid, reticulatin (1), was isolated from the lichen Parmotrema reticulatum (Taylor) M. Choisy (Parmeliaceae). Five previously-reported compounds were also isolated: zeorin (2), leucotylin (3), lupeol (4), betulinic acid (5), and dihydroreynosin (6). The structures were elucidated by 1D, 2D NMR, and HRESIMS spectroscopy and comparison with the literature. We propose that reticulatin is a biosynthetic product of fusicoccadiene and vinapraesorediosic acid A via Diels-Alder addition. … Read more...

34650

Pham N.-K.-T., Nguyen H.T., Dao T.-B.-N., Vu-Huynh K.L., Nguyen T.-Q.-T., Huynh B.-L.-C., Le T.-D., Nguyen N.-H, Nguyen N.-H. & Duong T.-H. (2022): Two new phenolic compounds from the lichen Parmotrema cristiferum growing in Vietnam, Natural Product Research, 36(15): 3865–3871

Two new phenolic compounds, cristiferides A-B (1-2) together with six known compounds, 2,4-dihydroxyphthalide (3), lecanoric acid (4), orsellinic acid (5), 5-chloroorsellinic acid (6), methyl haematommate (7), and methyl β-orsellinate (8) were isolated from the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae). The structures of isolated compounds were identified from its spectroscopic data and by comparison with the literatures. Compounds 1-3 and 6-8 were evaluated for alpha-glucosidase … Read more...

34651

Bui V.M., Huynh B.L.C., Pham N.K.T., Nguyen T.A.T., Nguyen T.T.T., Nguyen K.P.P. & Nguyen T.P. (2022): Usneaceratins A and B, two new secondary metabolites from the lichen Usnea ceratina, Natural Product Research, 36(15): 3945–3950

Two new compounds, comprising one dibenzofuran, named usneaceratin A (1), and one phenolic acid, named usneaceratin B (2), together with one known dibenzofuran, isousnic acid (3), and two known phenolics, orsellinic acid (4) and methyl orsellinate (5) were clarified from the lichen Usnea ceratina using variously chromatographic methods. Their structures were testified by comprehensive HR-ESI-MS, and NMR spectroscopic analysis, and comparison with published data. Their α-glucosidase inhibitory activity … Read more...

34652

Mendili M., Seaward M.R.D. & Khadhri A. (2022): Does the lichenicolous fungus Heterocephalacria bachmannii affect the antimicrobial potential of its host Cladonia foliacea?, Natural Product Research, 36(12): 3095–3099

The effects of the lichenicolous fungus Heterocephalacria bachmannii on the antimicrobial potential of the lichen Cladonia foliacea demonstrated that the extracts investigated have antimicrobial potential against gram-positive and negative bacteria, and yeast, and inhibit the germination of fungal spores. Inhibition activity varied considerably depending on the extract, the bacterial species, and the absence or presence of H. bachmannii; unparasitised C. foliacea has a higher antimicrobial activity. … Read more...