Three new species in subsection supported by genealogical and phenotypic coherence.

is a subsection composed of species of ectomycorrhizal fungi belonging to the hyperdiverse and cosmopolitan genus (Russulales). Species of are recognized by their fishy or shrimp odor, browning context, and a green reaction to iron sulfate. However, species delimitation has traditionally relied on morphology and analysis of limited molecular data.

Population structure and diversity of the needle pathogen suggests human-mediated movement in Europe.

Dothistroma needle blight (DNB) is an important disease of species that can be caused by one of two distinct but closely related pathogens; and . has a wide geographic distribution and is relatively well-known. In contrast, is known only from the United States and Europe, and there is a distinct lack of knowledge regarding its population structure and genetic diversity.

Low sensitivity of Pinus mugo to surface ozone pollution in the subalpine zone of continental Europe.

High altitudes have been exposed to enhanced levels of surface ozone (O) concentrations over recent decades compared to the pre-industrial era. The responses of vegetation to this toxic pollutant are species-specific and depend on the climate conditions. In this paper, we explored the reaction of Pinus mugo (P.

Diversity, migration routes, and worldwide population genetic structure of Lecanosticta acicola, the causal agent of brown spot needle blight.

Lecanosticta acicola is a pine needle pathogen causing brown spot needle blight that results in premature needle shedding with considerable damage described in North America, Europe, and Asia. Microsatellite and mating type markers were used to study the population genetics, migration history, and reproduction mode of the pathogen, based on a collection of 650 isolates from 27 countries and 26 hosts across the range of L. acicola.

Phylogeny of Look-Alikes Reveals a Convergent Morphology Evolution and a New Species .

is known as a common wood inhabiting fungus widely distributed throughout the Northern Hemisphere. There have been contrasting opinions about the delimitation and taxonomic treatment of the similar species . Our phylogeny did not support the close relationship of these two morphologically similar species and the grouping of collections labelled by both names within each phylogenetic species reflects unreliable species delimitations in the traditional literatures.

Four new species of Russula subsection Roseinae from tropical montane forests in western Panama.

Species of the genus Russula are key components of ectomycorrhizal ecosystems worldwide. Nevertheless, their diversity in the tropics is still poorly known. This study aims to contribute to the knowledge of the diversity of Russula species classified in subsection Roseinae based on specimens recently collected in tropical montane rainforests in western Panama.

Enlightening the black and white: species delimitation and UNITE species hypothesis testing in the Russula albonigra species complex.

Russula albonigra is considered a well-known species, morphologically delimited by the context of the basidiomata blackening without intermediate reddening, and the menthol-cooling taste of the lamellae. It is supposed to have a broad ecological range and a large distribution area. A thorough molecular analysis based on four nuclear markers (ITS, LSU, RPB2 and TEF1-α) shows this traditional concept of R.

Morphological and genetic diversification of , sp. nov., along the Isthmus of Panama.

Species of are ubiquitous members of ectomycorrhizal fungal communities in tropical ecosystems. However, an important part of the total tropical diversity of this genus and its biogeographic patterns is unknown due to the lack of studies on in tropical ecosystems. We combined molecular, morphological, ecological, and biogeographic data to elaborate concepts for two new subspecies of (subsection ).

Worldwide Genetic Structure Elucidates the Eurasian Origin and Invasion Pathways of , Causal Agent of Dothistroma Needle Blight.

, the primary causal agent of Dothistroma needle blight, is one of the most significant foliar pathogens of pine worldwide. Its wide host and environmental ranges have led to its global success as a pathogen and severe economic damage to pine forests in many regions. This comprehensive global population study elucidated the historical migration pathways of the pathogen to reveal the Eurasian origin of the fungus.