The genus Scleroderma (Sclerodermataceae) contains gasteroid ectomycorrhizal fungi and is distributed worldwide in temperate and tropical regions. Fresh specimens were collected in Thailand and report...

Health authorities race to contain fungus that survives routine disinfection.

RNA helicases are conserved enzymes found in both prokaryotes and eukaryotes. They function in all aspects of RNA metabolism and are known to influence various cellular and metabolic processes. In add...

Lichens are specialized complex ecosystems formed by algae/fungi living in interspecific symbiosis, which produce secondary metabolites that function as a defense against pathogens/competitors and/or external abiotic factors acting as antibiotics, antifeedants, UV protectants, etc., but also as a tool for taxonomy of lichen-forming fungi. However, the lichen substance content of crustose lichens of the genus Graphis from Colombian tropical dry forests has been poorly explored. In this work, the chemical composition of total extracts from three lichens belonging to the genus Graphis collected in the tropical dry forests of northern Colombia was determined by TLC/HPLC–DAD/MS (ESI); and from one of them, two depsidones were isolated/structurally characterized (LC-HRMS, 1H-13C (DEPT135, HSQC)-NMR). Consequently, the main findings were as follows: (i) stictic (1)/constictic (2), norstictic (5), and protocetraric (13) acids were the representative depsidones for G. dendrogramma (Tubará), G. dendrogramma (Piojó), and G. supracola, respectively; and (ii) the isolated depsidones from G. dendrogramma (Tubará) were stictic ( −)-(1) and constictic ( +)-(2) acids. These results provided key insights into the chemical diversity and taxonomic biomarkers of these species, and therefore, it could be concluded that (i) there was chemical variability between G. dendrogramma collected in different places, although all contained stictic acid–derived depsidones; (ii) for the first time, extrolites other than protocetraric acid (13) were identified for G. supracola, as well as norstictic acid (5) as major lichen substance for G. dendrogramma; (iii) the main chemical biomarker [stictic acid (1)] reported in the scientific literature for one of G. dendrogramma sample (Tubará) was confirmed (by LC–MS and NMR analysis); and (iv) for the first time, the specific optical rotation related to the chirality of the two isolated depsidones was determined [( −)-(1), ( +)-(2)].

Populus euphratica is a key deciduous and tall arbour capable of forming forests in arid and desert environments, exhibiting notable tolerance to drought, salinity and bacterial resistance. This study...

The Onygenales represent a versatile group of fungi that primarily inhabit soils, degrading cellulose and/or keratin. While some are known human pathogens, others are osmotolerant or colonize chitin s...

High planting density boosts crop yields but also heightens pest and pathogen risks. How plants adapt their defenses under these conditions remains unclear. In this study, we reveal that maize enhance...

Wie kommt es zu Resistenzen? Was genau passiert da in der Bakterienzelle? Und welche Alternativen gibt es zu klassischen Antibiotika? Darum geht es in der neuen Folge.

Covering: up to 2025Microbial interactions involve complex processes shaped by their ecological contexts. Herbivore animal dung denotes an interesting ecological niche for the study of interorganism c...

Abstract. The environmental niche and mode of transmission from the environment to humans of the emerging pathogenic yeast, Candidozyma (Candida) auris is

The cordyceps species in "The Last of Us," Ophiocordyceps unilateralis, is real and does exactly what the show purports —just not in humans, according to medical experts.