Results 11 to 20 of about 2,507,759 (125)

The Antimicrobial Activity of Extracts of the Lichen Cladonia foliacea and Its (–)-Usnic Acid, Atranorin, and Fumarprotocetraric Acid Constituents [PDF]

Zeitschrift Fur Naturforschung - Section C Journal of Biosciences, 2004
The antimicrobial activity of the chloroform, diethyl ether, acetone, petroleum ether, and ethanol extracts of the lichen Cladonia foliacea and its (-)-usnic acid, atranorin, and fumarprotocetraric acid constituents against 9 bacteria and fungi has been investigated.
Turgay Tay
exaly   +7 more sources

High acidity tolerance in lichens with fumarprotocetraric, perlatolic or thamnolic acids is correlated with low pKa1 values of these lichen substances

Environmental Pollution, 2009
The depsidone fumarprotocetraric acid as well as the depsides perlatolic and thamnolic acids are lichen secondary metabolites. Their first dissociation constants (pK(a1)) in methanol were determined to be 2.7 for perlatolic acid and 2.8 for fumarprotocetraric and thamnolic acids by UV spectroscopy. Lower pK(a1) values are, so far, not known from lichen
Christoph Leuschner, Markus Hauck
exaly   +5 more sources

Efects of Usnic, Barbatic and Fumarprotocetraric acids on Survival of Nasutitermes corniger (Isoptera: Termitidae: Nasutitermitinae)

Sociobiology, 2018
Lichens (Algal-Fungal association) synthesize unique chemical substances with different biological activities. Three pure lichen compounds were assayed to evaluate their potential insecticidal activity against the termite Nasutitermes corniger on Petri dishes.
Monica C B Martins, Rosineide Silva Lopes, Patricia Silva Barbosa, Rocio Santiago, Bruno Rafael Rodrigues, Auristela Correia de Albuquerque, Emerson Peter S. Flacão, Vera Lucia de M. Lima, Nicácio H. da Silva, Eugênia C. Pereira   +9 more
openaire   +4 more sources

Deciphering the biosynthetic pathways of lichen acids. [PDF]

New Phytol
Summary Depsides and depsidones are polyketide‐derived lichen acids widely distributed in lichen thalli, yet the biosynthetic gene clusters (BGCs) responsible for their production remain poorly understood. To address this gap, we investigated the diversity and evolutionary relationships of polyketide BGCs in lichens.
Kim W, Shishido TK, Pham HT, Kang KB, Liu R, Wahlsten M, Collemare J, Park H, Oh SO, Ha HH, Kim H, Hur JS.   +11 more
europepmc   +2 more sources

Biosynthetic gene cluster synteny: Orthologous polyketide synthases in Hypogymnia physodes, Hypogymnia tubulosa, and Parmelia sulcata

MicrobiologyOpen, Volume 12, Issue 5, October 2023., 2023
The new Parmelia sulcata genome from the metagenomic sample was evaluated with Hypogymnia physodes and Hypogymnia tubulosa to identify orthologous polyketide synthase (PKS)‐related biosynthetic gene clusters (BGC). The phylogenetic tree highlights the relation of investigated sequences.
Nadim Ahmad, Manfred Ritz, Anjuli Calchera, Jürgen Otte, Imke Schmitt, Thomas Brueck, Norbert Mehlmer   +6 more
wiley   +1 more source

Three overlooked species of Bacidia from insular Laurimacaronesia

Nordic Journal of Botany, Volume 39, Issue 3, March 2021., 2021
We discuss the taxonomy of three species of Bacidia occurring in insular Laurimacaronesia. Two of them, B. amylothelia (Vain.) Vain. and B. endoleucoides (Nyl.) Zahlbr., which were previously described from Angola and Madeira, respectively, are found here to belong in Bacidia s. str. (Ramalinaceae).
Stefan Ekman, Tor Tønsberg, Pieter P. G. van den Boom   +2 more
wiley   +1 more source

Contrasting responses of plant and lichen carbon‐based secondary compounds across an elevational gradient

Functional Ecology, Volume 35, Issue 2, Page 330-341, February 2021., 2021
A free Plain Language Summary can be found within the Supporting Information of this article. Abstract Vascular plants and lichens often produce a diversity of carbon‐based secondary compounds (CBSCs) to protect them against biotic and abiotic stresses.
Johan Asplund, Kristel van Zuijlen, Ruben E. Roos, Tone Birkemoe, Kari Klanderud, Simone I. Lang, David A. Wardle, Line Nybakken, Jessamyn Manson   +8 more
wiley   +1 more source

The Role of Secondary Metabolites and Bark Chemistry in Shaping Diversity and Abundance of Epiphytic Lichens

Frontiers in Forests and Global Change, 2022
Diversity of secondary lichen metabolites was studied in epiphytic lichens on six phorophytes—spruce, pine, birch, alder, aspen and poplar in the Middle Urals of Russia. Atranorin, usnic, fumarprotocetraric acid, zeorin, and gyrophoric acid were found in
Alexander Paukov, Anzhelika Teptina, Alexander Ermoshin, Ekaterina Kruglova, Lada Shabardina   +4 more
doaj   +1 more source

Comparative analyses of antioxidant, cytotoxic, and anti-inflammatory activities of different Cladonia species and determination of fumarprotocetraric acid amounts

Kahramanmaraş Sütçü İmam Üniversitesi Tarım ve Doğa Dergisi, 2021
In traditional medicine, Cladonia lichens are used for several disorders like hypertension, headaches, dizziness, cough, and menstrual disorders. The study aimed to determine the biological activities of 70% methanol extracts of nine Cladonia species from Turkey.
Zekiye KOCAKAYA, Mustafa KOCAKAYA, Gökçe ŞEKER KARATOPRAK   +2 more
openaire   +4 more sources

Air pollution affects lichen species richness, species density, relative growth form abundance and their secondary metabolite production: a case study in Kandy district, Sri Lanka

Ruhuna Journal of Science, 2021
Lichens are symbiotic associations between fungi and algae and/or cyanobacteria, consisting of three forms, viz: fruticose, foliose and crustose. Air pollution affects lichen diversity, percent cover, and density.
W.G.D.I. Gunawardana, E.S.M. Edirisinghe, C.L. Abayasekara , A.D.S.N.P. Athukorala   +3 more
doaj   +1 more source