76 research outputs found
FIGURE 5 in Pseudotomentella badjelanndana, Pseudotomentella sorjusensis and Tomentella viridibasidia-three new corticioid Thelephorales species from the Scandes Mountains
No full textFIGURE 5. Morphological features of T. viridibasidia, mounted in KOH and macroscopically. A, B basidiospores in frontal face; C, D in lateral face; E microscopic overview; F mature basidiome (holotype). The scale bar represents 10 µm.Published as part of Svantesson, Sten, Larsson, Karl-Henrik & Larsson, Ellen, 2021, Pseudotomentella badjelanndana, Pseudotomentella sorjusensis and Tomentella viridibasidia-three new corticioid Thelephorales species from the Scandes Mountains, pp. 61-78 in Phytotaxa 497 (2) on page 73, DOI: 10.11646/phytotaxa.497.2.1, http://zenodo.org/record/542383
FIGURE 4 in Pseudotomentella badjelanndana, Pseudotomentella sorjusensis and Tomentella viridibasidia-three new corticioid Thelephorales species from the Scandes Mountains
No full textFIGURE 4. Morphological features of P. sorjusensis, mounted in KOH and macroscopically. A, B basidiospores in frontal face; C, D in lateral face; E microscopic overview; F mature basidiome (holotype). The scale bar represents 10 µm.Published as part of Svantesson, Sten, Larsson, Karl-Henrik & Larsson, Ellen, 2021, Pseudotomentella badjelanndana, Pseudotomentella sorjusensis and Tomentella viridibasidia-three new corticioid Thelephorales species from the Scandes Mountains, pp. 61-78 in Phytotaxa 497 (2) on page 71, DOI: 10.11646/phytotaxa.497.2.1, http://zenodo.org/record/542383
Pseudotomentella sorjusensis Svantesson & Larsson & Larsson 2021, sp. nov.
No full textPseudotomentella sorjusensis Svantesson, sp. nov. (Fig. 4) MycoBank No.: MB 835163. UNITE SH: SH1185284.08 FU. Etymology: the name refers to Sorjus, an older spelling of the type locality. Type: SWEDEN. Lule Lappmark: Jokkmokk, Sårjås N, low alpine heath on ground with intermediate pH, on underside of stone, 17 August 2016, S . Svantesson 298 (holotype: GB!, GenBank Acc. No. ITS: MT 146448). Basidiome annual, resupinate, membranaceous; effused to approximately five centimetres in diameter. Mature parts continuous, with a firm, fibrous and compact yet soft and rather elastic texture. Hymenium smooth; greenish brown when fresh, brown with a reddish hue when dried. Immature parts discontinuous, byssoid with a cottony texture. Subhymenium and hymenium of immature parts blue grey when fresh, blue grey to grey brown when dried. Subiculum well-developed, loose, fibrous, brown; forms the outer edge of the basidiome, extending noticeably beyond the hymenium. Hyphal cords lacking, but loose bundles of subicular hyphae sometimes present. Hyphal system monomitic, clamp connections absent from all hyphae. Subicular hyphae noticeably long and straight, thick-walled; forming a loose tissue. Individual hyphae (3.0–) 3.1–4.3 μm wide, with a mean width of 3.6 μm; brown to orange brown in KOH, orange brown in water; inamyloid. Subhymenial hyphae often somewhat sinuous, thin to thick-walled; forming a rather dense tissue. Individual hyphae 3.3–5.2 (–5.5) μm wide, with a mean width of 4.3 μm; hyaline to brown in KOH, with a green or blue green reaction in the presence of air; pale green to pale orange green in water, with strongly granular contents; occasionally amyloid. Encrustation none observed. Basidia with four slightly curved sterigmata, occasionally two-sterigmate; clavate to narrowly clavate, sometimes clavopedunculate, thin-walled, with one–three slight constrictions. Dimensions: 41–56 (–59) × (10.1–) 10.3–12.1 (– 12.6) μm; mean dimensions: 48 × 11.5 μm. Sterigmata (7.0–) 7.2–8.9 (–9.2) μm long, with a mean length of 8.0 μm. Colours and reactions the same as for subhymenial hyphae; amyloid reaction most frequently found at the bases of basidia. Cystidial organs lacking. Basidiospores in frontal face generally with a subcircular or triangular basic shape and an angular, nodulose, triangular or sometimes cross-shaped outline, covered in bi-or trifurcate, sometimes singularly attached, echinuli. A majority of the spores with three-five distinct, rounded to square lobes; seven-lobed spores occasionally occurring; abnormally large spores originating from two-sterigmate basidia infrequently seen. Frontal dimensions: 7.4 – 8.6 (–9.1) × 7.7–8.8 (–9.1) μm; mean dimensions: 8.1 × 8.2 μm; Q-value: 0.9–1.1; mean Q-value: 1.0. Echinuli (0.5–) 0.6–0.8 μm long, with a mean length of 0.7 μm. Lateral face ellipsoid to ovoid, with evenly rounded edges or one–three lobes. Lateral dimensions: 7.4–8.5 × (5.0–) 5.2–6.3 (–6.5) μm; mean dimensions: 7.9 × 5.8 μm; Q-value: 1.2–1.5; mean Qvalue: 1.4. Colour in KOH pale brown to pale orange brown, in the presence of air sometimes with a green to blue green reaction; in water pale orange brown; occasionally amyloid. Chlamydospores lacking. Habitat The only specimen recorded to date of P. sorjusensis is the type collection, which was found in a low alpine heath on ground with intermediate pH. UNITE sequence metadata show that the species forms ectomycorrhiza with at least Picea abies (L.) H. Karst., Picea glauca (Moench) Voss, Salix arctica Pall. and Salix caprea L. (Kõljalg et al. 2005, Nilsson et al. 2018). One of the root tip sequences originate from an arctic locality, while the remaining sequences in the UNITE SH come from temperate forests in lowland areas. Distribution Basidiomata encountered in: Sweden. Root tip samples confirm presence also in Estonia (3), Canada (2), and soil samples in Estonia (56) and Latvia (2). Remarks Within the P. tristis group, the basidiome of P. sorjusensis can be recognised by its lack of hyphal cords and skeletal hyphae, its dense, compact texture after drying, bluish colour of immature parts, narrow subicular hyphae and its short spores. Two species, P. badjelanndana and P. rotundispora are similar to P. sorjusensis. Pseudotomentella badjelanndana has thinner subhymenial hyphae, whose mean diameter is smaller than its subicular hyphae. Its spores are also generally longer than wide and have longer echinuli but a larger frontal face than in P. sorjusensis. Pseudotomentella rotundispora differs from P. sorjusensis by slightly thinner subhymenial hyphae, which are of more or less equal width to its subicular hyphae and by its spores, which are slightly shorter in frontal face. For further notes on the morphological separation of species within the P. rotundispora group see Remarks under the description of P. badjelanndana. Other described species within the group can appear similar, but have either wider hyphae, longer spores or both.Published as part of Svantesson, Sten, Larsson, Karl-Henrik & Larsson, Ellen, 2021, Pseudotomentella badjelanndana, Pseudotomentella sorjusensis and Tomentella viridibasidia-three new corticioid Thelephorales species from the Scandes Mountains, pp. 61-78 in Phytotaxa 497 (2) on pages 71-72, DOI: 10.11646/phytotaxa.497.2.1, http://zenodo.org/record/542383
Elastic pressure-volume curves of the respiratory system reveal a high tendency to lung collapse in young pigs”
No full textTaxonomy and Systematics of Thelephorales – Glimpses Into its Hidden Hyperdiversity
No full textThe order Thelephorales is a widespread group of many thousands of species of ecologically important, ectomycorrhizal fungi, of which only a fraction have been described to date. Most species are corticioid (skin-like) and form complexes of morphologically similar, closely related species. At the same time the names that do exist are often old, have unclear synonymy and their common presence within such complexes often hinders the description of new species. For the comparatively few stipitate (with cap and stipe) Thelephorales species taxonomic knowledge is more complete but the phylogenetic relationships between taxa is largely unknown; most existing genera have been circumscribed based on macromorphology. Many stipitate species occurring in the Nordic countries are dependent on old growth forest and are hence included in the national Red Lists, while the conservational situation for nearly all corticioid species is unknown, due to their unclear taxonomy. Pseudotomentella tristis s.l. is a seemingly common, widespread and ecologically very plastic, corticioid morphospecies with an old name and nine heterotypic synonyms. Through a combination of type studies, precise spore measurements, ecological data and a multi-gene phylogeny, three species are identified under already existing names and another ten are described as new. One species, P. umbrina, is found to indeed be a common and widespread species with a wide ecological amplitude, while the remaining 12 are less common, possibly less widespread, have narrower ecological niches and in a few
cases seem to be host-restricted. In similarity to stipitate species, a large proportion of the newly described species seem to only occur in old growth forest.
Three corticioid species from the Scandes mountains, two Pseudotomentella species and one Tomentella, are described as new, based on ITS-LSU phylogenies. The Pseudotomentella species belong to the P. tristis group, where they are more or less cryptic with another newly described species.
A new, stipitate species in the hitherto corticioid genus Amaurodon is described, the stipitate genera Hydnellum and Sarcodon are delimited against each other and the stipitate genus Polyozellus is delimited against the corticioid genus Pseudotomentella – the former two with phylogenies based on ITS and LSU
sequences and the latter based on a multi-gene dataset. Hydnellum is found to make Sarcodon paraphyletic, as does Polyozellus Pseudotomentella. To amend this, twelve species are recombined from Hydnellum to
Sarcodon, while all species, including the type, are moved from Pseudotomentella to Polyozellus.
In conclusion, this thesis demonstrates that corticioid species complexes in Thelephorales with many taxa and old names can be successfully disentangled and presents a method for doing so; it identifies molecular markers and sets a standard of measuring spores and collating ecological data that will facilitate further taxonomic work within the order. In addition, it shows that basidiomata shape is a poor predictor of generic affinity, even when derived from such striking differences as the separation of stipitate and
corticioid forms. Consequently, the extinction threat previously documented for stipitate species is likely not restricted to such, and this is also tentatively shown for corticioid Polyozellus species
Elastic pressure-volume curves of the respiratory system reveal a high tendency to lung collapse in young pigs”
No full textElastic pressure-volume curves of the respiratory system reveal a high tendency to lung collapse in young pigs”
No full textExkursionsrapport till Närke våren 2017
No full textSLF’s vårexkursion gick till trakterna av Kumla och Örebro med Mikael Hagström som arrangör. En god skara människor hade slutit upp och trotsade de initialt urusla vädret, men som tur var bättrade det sig. Med på exkursionen var Martin Westberg, Samantha Fernandez Brime, Ulf Arup, Emil Persson, Sten Svantesson, Stefan Ekman, Linnea Eide-Ekman, Måns Svensson, Lovisa Fogelberg, Ola Hammarström, Jesper Wadstein, Björn Owe-Larsson, Toni Berglund, Anders Carlberg och Per Larsson
Data localisation trends and challenges: Considerations for the review of the privacy guidelines
No full textThis report aims to review research on data localisation as an emerging impediment to data flows and data privacy protection. The report serves to inform the review of the implementation of the OECD Privacy Guidelines [OECD/LEGAL/0188] and guide further discussions amongst members of the OECD Working Party on Data Governance and Privacy in the Digital Economy (DGP), the OECD Secretariat and the Privacy Guidelines Expert Group that was formed to support the review.This paper was drafted by Professor Dan Jerker B. Svantesson, Professor of Law, Bond University with feedback from Professor Christopher Kuner, Founder and Co-Director, Brussels Privacy Research Hub, Vrije, Universiteit Brussel , Elettra Ronchi and Lauren Bourke of the OECD Secretariat. It benefitted from the input of the expert group established to support the review of the OECD Privacy Guidelines and delegates of the Working Party on Data Governance and Privacy. The paper was further discussed at the virtual OECD Expert Roundtable on “Data localisation and Trusted Government Access to Data” held on 5-6 October 2020. The work was made possible by the generous contributions of Japan.This paper should not be reported as representing the official views of the OECD or of its membercountries. The opinions expressed and arguments employed are those of the author. It describespreliminary results or research in progress by the author and is published to stimulate discussion on a broad range of issues on which the OECD works. Comments on this paper are welcomed, and may be sent to the Directorate for Science, Technology and Innovation, OECD, 2 rue André-Pascal, 75775 ParisCedex 16, France.
Taxonomy and Systematics of Thelephorales – Glimpses Into its Hidden Hyperdiversity
No full textThe order Thelephorales is a widespread group of many thousands of species of ecologically important, ectomycorrhizal fungi, of which only a fraction have been described to date. Most species are corticioid (skin-like) and form complexes of morphologically similar, closely related species. At the same time the names that do exist are often old, have unclear synonymy and their common presence within such complexes often hinders the description of new species. For the comparatively few stipitate (with cap and stipe) Thelephorales species taxonomic knowledge is more complete but the phylogenetic relationships between taxa is largely unknown; most existing genera have been circumscribed based on macromorphology. Many stipitate species occurring in the Nordic countries are dependent on old growth forest and are hence included in the national Red Lists, while the conservational situation for nearly all corticioid species is unknown, due to their unclear taxonomy. Pseudotomentella tristis s.l. is a seemingly common, widespread and ecologically very plastic, corticioid morphospecies with an old name and nine heterotypic synonyms. Through a combination of type studies, precise spore measurements, ecological data and a multi-gene phylogeny, three species are identified under already existing names and another ten are described as new. One species, P. umbrina, is found to indeed be a common and widespread species with a wide ecological amplitude, while the remaining 12 are less common, possibly less widespread, have narrower ecological niches and in a few cases seem to be host-restricted. In similarity to stipitate species, a large proportion of the newly described species seem to only occur in old growth forest. Three corticioid species from the Scandes mountains, two Pseudotomentella species and one Tomentella, are described as new, based on ITS-LSU phylogenies. The Pseudotomentella species belong to the P. tristis group, where they are more or less cryptic with another newly described species. A new, stipitate species in the hitherto corticioid genus Amaurodon is described, the stipitate genera Hydnellum and Sarcodon are delimited against each other and the stipitate genus Polyozellus is delimited against the corticioid genus Pseudotomentella – the former two with phylogenies based on ITS and LSU sequences and the latter based on a multi-gene dataset. Hydnellum is found to make Sarcodon paraphyletic, as does Polyozellus Pseudotomentella. To amend this, twelve species are recombined from Hydnellum to Sarcodon, while all species, including the type, are moved from Pseudotomentella to Polyozellus. In conclusion, this thesis demonstrates that corticioid species complexes in Thelephorales with many taxa and old names can be successfully disentangled and presents a method for doing so; it identifies molecular markers and sets a standard of measuring spores and collating ecological data that will facilitate further taxonomic work within the order. In addition, it shows that basidiomata shape is a poor predictor of generic affinity, even when derived from such striking differences as the separation of stipitate and corticioid forms. Consequently, the extinction threat previously documented for stipitate species is likely not restricted to such, and this is also tentatively shown for corticioid Polyozellus species
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