title: Phylogeny and taxonomy of the Ophiostoma piceae complex and the Dutch elm disease fungi

authors: Harrington, Thomas C.

subjects: Bluestain

abstract: The Ophiostoma piceae complex forms a monophyletic group of insect-dispersed pyrenomycetes with synnemata (Pesotum) and micronematous (Sporothrix) synanamorphs. Other species of Ophios-toma outside of the O. piceae complex that form syn-nemata lack the Sporothrix state. The nine recognized species within the 0. piceae complex are delimited by synnema morphology, growth rate at 32 C, mating reactions and sequences of the internal transcribed spacer (ITS) region of the rDNA operon. Phyloge-netic analysis of the ITS region suggests two major clades in the complex, one that causes bluestain in primarily coniferous hosts and the other on primarily hardwood hosts. In the coniferous group are O. pi-ceae, O. canum, O. floccosum and the recently de-scribed O. setosum (anamorph Pesotum cupulatum sp. nov.). In the hardwood group are O. querci, O. caton-ianum, and the Dutch elm disease fungi: O. ulmi, O. novo-ulmi and O. himal-ulmi. Restriction fragment length polymorphisms of the ITS region are shown to be a convenient diagnostic tool for delimiting these species.

text: Phylogeny and taxonomy of the Ophiostoma piceae complex and the Dutch elm disease fungi The Ophiostoma piceae complex forms a monophyletic group of insect-dispersed pyrenomycetes with synnemata (Pesotum) and micronematous (Sporothrix) synanamorphs. Other species of Ophios-toma outside of the O. piceae complex that form syn-nemata lack the Sporothrix state. The nine recognized species within the 0. piceae complex are delimited by synnema morphology, growth rate at 32 C, mating reactions and sequences of the internal transcribed spacer (ITS) region of the rDNA operon. Phyloge-netic analysis of the ITS region suggests two major clades in the complex, one that causes bluestain in primarily coniferous hosts and the other on primarily hardwood hosts. In the coniferous group are O. pi-ceae, O. canum, O. floccosum and the recently de-scribed O. setosum (anamorph Pesotum cupulatum sp. nov.). In the hardwood group are O. querci, O. caton-ianum, and the Dutch elm disease fungi: O. ulmi, O. novo-ulmi and O. himal-ulmi. Restriction fragment length polymorphisms of the ITS region are shown to be a convenient diagnostic tool for delimiting these species.

year: 2001

title: Foreword: Crossing new frontiers

authors: Veres, Daniel

subjects: tephrochronology

abstract: The local organising committee (LOC), together with members of the executive committee of the International Focus Group on Tephrochronology and Volcanism (INTAV), warmly welcome you to this international field conference on tephrochronology, “Tephra Hunt in Transylvania”, set in the wonderful landscapes of the south Carpathian Mountains in Moieciu de Sus, Romania, from 24 June to 1 July, 2018.

text: Foreword: Crossing new frontiers The local organising committee (LOC), together with members of the executive committee of the International Focus Group on Tephrochronology and Volcanism (INTAV), warmly welcome you to this international field conference on tephrochronology, “Tephra Hunt in Transylvania”, set in the wonderful landscapes of the south Carpathian Mountains in Moieciu de Sus, Romania, from 24 June to 1 July, 2018.

year: 2018

title: Protecting the heartwood: How can tikanga Māori and mātauranga Māori inform the construction of digital identities and relational responsibilities to data in Aotearoa New Zealand?

authors: Lucas, Danielle

abstract: A report prepared by Danielle Lucas as part of the Tikanga in Technology research project

text: Protecting the heartwood: How can tikanga Māori and mātauranga Māori inform the construction of digital identities and relational responsibilities to data in Aotearoa New Zealand? A report prepared by Danielle Lucas as part of the Tikanga in Technology research project

year: 2025-02-11