Page 3534 of 3657 Results 35331 - 35340 of 36569
Id/Author/Year/TitleOrder by:  Year  Id  Author  Title
34686
Ndhlovu N.T., Minibayeva F. & Beckett R.P. (2022): Unpigmented lichen substances protect lichens against photoinhibition of photosystem II in both the hydrated and desiccated states - Acta Physiologiae Plantarum, 44: 123 [7 p.]

Lichen secondary metabolites have been suggested to play a great diversity of roles in lichen biology by acting as UV screens, antimicrobials, herbivore deterrents or allelopathic compounds. However, evidence is also beginning to accumulate that in addition to these roles, even faintly pigmented or unpigmented lichen substances can reduce photoinhibition caused by high levels of photosynthetically active radiation (PAR). Here we used an acetone rinsing technique to remove lichen substances … URL EndNote Read more... 

34687
Mkhize K.W.G., Minibayeva F. & Beckett R.P. (2022): Lichen photobionts can be hardened to photoinhibition by pretreatment with light - Acta Physiologiae Plantarum, 44: 122 [10 p.]

Lichens often grow in microhabitats where they receive more light than they are capable of using to fx carbon. Unless regulated, this excess energy can end up activating oxygen, thereby forming reactive oxygen species (ROS). These ROS can damage the photosynthetic apparatus and other cellular components, causing photoinhibition and photo-oxidative stress. Tolerance to high light theoretically can be achieved in a variety of ways, but for lichen photobionts, our knowledge of the precise mechanisms … URL EndNote Read more... 

34688
Gueidan C., Monnat J.-Y. & Roux C. (2022): Verrucariopsis Gueidan, Monnat et Cl. Roux gen. nov., genre nouveau de lichens (Ascomycota, Verrucariaceae) - Bulletin de la Société Linnéenne de Provence, 73: 61–77

[in French, additionally with Esperanto and English abstracts] Description of the new lichen genus Verrucariopsis Gueidan, Monnat & Cl. Roux gen. nov. whose type species, V. suaedae Gueidan, Monnat & Cl. Roux sp. nov., was discovered on the coast of Brittany and Loire – Atlantique, on the upper schorre of rias where it grows on stems of Suaeda vera, on the supralittoral zone. The morpho – anatomical and phylogenetic study showed that Verrucariopsis belongs to the Verrucariaceae family and that … EndNote Read more... 

34690
Vasco-Palacios A.M., Lücking R., Moncada B., Palacio M. & Motato-Vásque V. (2022): A critical assessment of biogeographic distribution patterns of Colombian fungi - In: de Almeida R.F., Lücking R., Vasco-Palacios A.M., Gaya E. & Diazgranados M. (eds), Catalogue of Fungi of Colombia, p. 121–137, Kew Publishing, Royal Botanic Gardens, Kew

Book chapter. This chapter attempts to assess the distribution patterns of three selected groups of fungi, namely polypores, ectomycorrhizal fungi (EcM), and lichenised fungi in Colombia. Assessing the biogeography of fungi is difficult because of two key issues: 1. information gaps on their distribution and biology in biodiversity-rich countries, such as Colombia, and 2. the traditional, phenotype-based species concepts, which make it difficult to recognise cryptic species or species complexes. … EndNote Read more... 

34691
Frisch A., Ohmura Y., Holien H. & Bendiksby M. (2022): A phylogenetic survey of the ascomycete genus Arthrorhaphis (Arthrorhaphidaceae, Lecanoromycetes) including new species in Arthrorhaphis citrinella sensu lato - Taxon, 71(5): 936–962

The genus Arthrorhaphis is a group of ascomycetes comprising lichenised and non-lichenised taxa from temperate to arctic-alpine regions in both hemispheres. Nine species and two infraspecific taxa are currently recognised. Their delimitation, inter-relationships, and phylogenetic placement remain poorly understood. We have used an integrative taxonomic approach to assess taxon limits, phylogenetic placement of the family, and to test the hypothesis that transition to lichenisation has happened … URL EndNote Read more... 

34692
Lendemer J.C. & McMullin R.T. (2022): Lectotypification of the threatened endemic Appalachian lichen Alectoria fallacina - Taxon, 71(5): 1077–1083

Alectoria fallacina, described by the prolific 20th century lichenologist Josef Motyka, is a threatened species narrowly endemic to the Appalachian Mountains of eastern North America. The production of a unique unidentified fatty acid as the main secondary metabolite chemically separates A. fallacina from its congeners, especially the morphologically similar A. sarmentosa. Here we show that while A. fallacina and A. sarmentosa are entirely allopatric, the type collection of A. fallacina is a mixture … URL EndNote Read more... 

34693
Rocha B., Matos P., Giordani P., Lõhmus P., Branquinho C., Casanelles-Abella J., Aleixo C., Deguines N., Hallikma T., Laanisto L., Moretti M., Alós Ortí M., Samson R., Tryjanowski P. & Pinho P. (2022): Modelling the response of urban lichens to broad-scale changes in air pollution and climate - Environmental Pollution, 315: 120330 [10 p.]

To create more resilient cities, it is important that we understand the effects of the global change drivers in cities. Biodiversity-based ecological indicators (EIs) can be used for this, as biodiversity is the basis of ecosystem structure, composition, and function. In previous studies, lichens have been used as EIs to monitor the effects of global change drivers in an urban context, but only in single-city studies. Thus, we currently do not understand how lichens are affected by drivers that … URL EndNote Read more... 

34694
Kalın Ş.N., Altay A. & Budak H. (2022): Inhibition of thioredoxin reductase 1 by vulpinic acid suppresses the proliferation and migration of human breast carcinoma - Life Sciences, 310: 121093 [11 p.]

Aims It was aimed to investigate the thioredoxin reductase 1 (TrxR1)-targeted anticancer effect of vulpinic (VA) and lecanoric (LA) acids, which are lichen secondary metabolites, on breast cancer MCF-7 and MDA-MB-453 cell lines, and to compare the effectiveness of this potential effect against commercial chemotherapeutic drugs carboplatin and docetaxel. Main methods The anticancer effects of both lichen metabolites were evaluated by XTT, flow cytometry analysis, cell scratch, and transwell … URL EndNote Read more... 

34695
da Silva B.F., da Silva K.E.M., de Farias E.E.G., de França E.J., Martins M.C.B., Santos M.L.O., Buril M.M.L., Alves G.G.S., Silva A.K.O., Júnior E.B.L., da Silva N.H. & Pereira E.C. (2022): Cladonia verticillaris (lichen) can exhibit defense mechanisms against Rn-222 under controlled conditions - Journal of Radioanalytical and Nuclear Chemistry, 331: 3671–3679

This study aimed to evaluate the efects of the Rn-222 progeny on the lichen Cladonia verticillaris under controlled conditions. The results showed resistance of the species, and few changes in the level of photosynthetic pigments. Blockage in the biosynthetic route of the major phenolic compound fumarprotocetraric acid was also identifed, and accumulation of protocetraric acid, as defense mechanism against external pollutants, to maintain thallus vitality. The accumulation of the 210Pb and … URL EndNote Read more... 

34696
Kuusisto I. & Mattanen S. (2022): Caloplaca tornoënsis new to Finland - Graphis Scripta, 34(6): 54–58

Caloplaca tornoënsis is reported from Finland for the first time. Specimens were collected from five locations of NW Finland and from one location of NE Finland. Collections were made from snowbeds on bryophytes using transect plot-based sampling method. C. tornoënsis has a circumpolar distribution and it is probably overlooked, although a rare species in Finland. The species should be looked for in late melting areas of mountains of northernmost Finland. URL EndNote Read more... 

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