Katalog - Lichenological literature

33679

Goodenough U., Wagner R. & Roth R. (2021): Lichen 4. The Algal Layer, Algal Research, 58: 102355 [53 p.]

A lichen is a slow-growing niche-constructing organism that forms a thallus via scripted symbiotic/mutualist relationships between fungi, algae, and bacteria. Here we use quick-freeze deep-etch electron microscopy (QFDEEM) and light microscopy to probe a hallmark lichen construction wherein clusters of algae and hyphae, inter-connected by wall-to-wall junctions, form stable consortia that we call green modules. These assemble in the pseudo-meristem and then localize to the algal layer of the … Read more...

33680

Martins C.C., de Abreu-Mota M.A., do Nascimento M.G., Dauner A.L.L., Lourenço R.A., Bícego M.C. & Montone R.C. (2021): Sources and depositional changes of aliphatic hydrocarbons recorded in sedimentary cores from Admiralty Bay, South Shetland Archipelago, Antarctica during last decades, Science of the Total Environment, 795: 148881 [9 p.]

Organic biomarkers, as aliphatic hydrocarbons, are present in sedimentary organic matter and have been largely applied to the evaluation of recent environmental changes in the marine environment around the globe, including the Antarctic continent. Five sediment cores were taken in the Admiralty Bay, South Shetland Archipelago, Antarctica to evaluate changes in the signature of aliphatic hydrocarbons such as n-alkanes (n-C10 to n-C40) and isoprenoids as pristane and phytane, over the last decades. … Read more...

33681

Svensson M. & Owe-Larsson B. (2021): Synonymizations and lectotypifications of some lecideoid lichens (Ascomycota, Lecanoromycetes) described from Finland or Sweden, Nordic Journal of Botany, 39(7): e03236 [9 p.]

Between 1850 and 1950, hundreds of lecideoid lichen-forming fungi were described from Fennoscandia, mainly in the genus Lecidea. The status of many of these species is still uncertain and some have not been revised since their description. We examined types and nomenclature of nine such lecideoid taxa, and found that they represent synonyms of earlier described species: Bacidia dolera (= Lecidea albofuscescens), Lecidea aviaria (= Rhizocarpon richardii), L. cavernarum (= Porpidia soredizodes), L. … Read more...

33682

Jeong M.-H., Park C.-H., Kim J.A., Choi E.D., Kim S., Hur J.-S. & Park S.-Y. (2021): Production and activity of cristazarin in the lichen-forming fungus Cladonia metacorallifera, Journal of Fungi, 7(8): 601 [14 p.]

Lichens are a natural source of bioactive compounds. Cladonia metacorallifera var. reagens KoLRI002260 is a rare lichen known to produce phenolic compounds, such as rhodocladonic, thamnolic, and didymic acids. However, these metabolites have not been detected in isolated mycobionts. We investigated the effects of six carbon sources on metabolite biosynthesis in the C. metacorallifera mycobiont. Red pigments appeared only in Lilly and Barnett’s media with fructose at 15 °C after 3 weeks of culture … Read more...

33683

Wu H.-X., Ren W.-B., Li X.-H. & Yang Z.-X. (2021): A new species of foliicolous lichenized fungi from southwest China: Calopadia ruiliensis sp. nov., Turkish Journal of Botany, 45: 371–377

Calopadia ruiliensis, found on living leaves in southwest China, is described as a new species, based on morphology and phylogenetic analysis. It is characterized by a foliicolous thallus with yellow greenish to creamy yellow color, rounded apothecia with nonpruinose to thinly pruinose disc, a dark olive-green hypothecium and black-brown subhymenium, and 1-spored asci producing muriform ascospores. Phylogenetic analysis of LSU sequence data shows that the new species clusters in the genus Calopadia … Read more...

33684

Vaez M. & Davarpanah S.J. (2021): New insights into the biological activity of lichens: bioavailable secondary metabolites of Umbilicaria decussata as potential anticoagulants, Chemistry and Biodiversity, 18: e2100080 [12 p.]

This study reports the in vitro anticoagulation activity of acetonic extract (AE) of 42 lichen species and the identification of potential bioavailable anticoagulant compounds from Umbilicaria decussata as a competent anticoagulant lichen species. Lichens’ AEs were evaluated for their anticoagulant activity by monitoring activated partial thromboplastin time (APTT) and prothrombin time (PT) assays. A strong, positive correlation was observed between total phenolics concentration (TPC) of species … Read more...

33685

Dal Forno M., Lawrey J.D., Sikaroodi M., Gillevet P.M., Schuettpelz E. & Lücking R. (2021): Extensive photobiont sharing in a rapidly radiating cyanolichen clade, Molecular Ecology, 30: 1755–1776

Recent studies have uncovered remarkable diversity in Dictyonema s.lat. basidiolichens, here recognized as subtribe Dictyonemateae. This group includes five genera and 148 species, but hundreds more await description. The photobionts of these lichens belong to Rhizonema, a recently resurrected cyanobacterial genus known by a single species. To further investigate photobiont diversity within Dictyonemateae, we generated 765 new cyanobacterial sequences from 635 specimens collected from 18 countries. … Read more...

33686

Muhoro A.M. & Farkas E.É. (2021): Insecticidal and antiprotozoal properties of lichen secondary metabolites on insect vectors and their transmitted protozoal diseases to humans, Diversity, 13(8): 342 [15 p.]

Since the long-term application of synthetic chemicals as insecticides and the chemotherapy of protozoal diseases have had various negative effects (non-target effects, resistance), research on less harmful biological products is underway. This review is focused on lichens with potential insecticidal and antiprotozoal activity. Literature sources (27) were surveyed from five bibliographic databases and analyzed according to the taxonomic group of the insect, the protozoal disease and the lichen, … Read more...

33687

Habib K., Zulfiqar R. & Khalid A.N. (2021): Additions to the lichen genus Rhizocarpon in Pakistan and their comparative analysis, Webbia, 76(1): 123–134

As part of a comprehensive study of lichen diversity of northern areas of Pakistan using molecular and morphological approaches, we found four species of the genus Rhizocarpon. The analysis revealed two new species in the lichen biota of Pakistan namely, Rhizocarpon lavatum and Rhizocarpon petraeum, while the other two, Rhizocarpon disporum and Rhizocarpon geminatum are reported for the second time, from new localities. In comparison to literature information and GenBank sequences of the … Read more...

33688

Lendemer J.C. & Keepers K.G. (2021): Bacidia depriestiana (Ramalinaceae), a new species from the southern Appalachian Mountains of eastern North America, Bryologist, 124(3): 362–375

Bacidia depriestiana is described as new to science based on material from the southern Appalachian Mountains of eastern North America. The species has a granular to minutely areolate thallus, with minute, erumpent soralia, produces atranorin and zeorin, and is not known to produce apothecia. The combination of chemistry and thallus type appears to be unique within the genus. Originally identified as Lecanora nothocaesiella, the species was recognized as distinct in conjunction with study of … Read more...