CBS News June 2010

Studies in Mycology No. 66 Now available!!!

Systematics of Calonectria: a genus of root, shoot and foliar pathogens

Author(s): Lorenzo Lombard, Pedro W. Crous, Brenda D. Wingfield and Michael J. Wingfield
Details: 71 pp., fully illustrated with colour pictures (A4 format), paperback, 2010.

Species of the genus Calonectria (Hypocreales) are important plant pathogens, several of which have a worldwide distribution. Taxonomic studies on these fungi have chiefly relied on DNA sequence comparisons of the β-tubulin (BT) gene region, because the ITS gene has proven inordinately conserved to facilitate species discrimination. There are about 68 species of Calonectria associated with root, stem and leaf diseases of numerous plant hosts. Attempts to resolve species boundaries have resulted in a multigene database employing seven gene regions including actin (ACT), BT, calmodulin (CAL), histone H3 (HIS3), ITS, translation elongation 1-alpha (TEF-1α) and the 28S large subunit RNA gene, for all species. Although the BT gene region provided valuable insights into relationships among species of Calonectria, analyses of individual coding gene regions and single nucleotide polymorphisms showed that CAL sequence data provided the best resolution in distinguishing between them. Sequence data for the TEF-1α, HIS3, BT and ACT gene regions were less useful. This issue contains three papers, and describes 10 novel species. All names formerly accommodated in the genus Cylindrocladium are combined into the older generic name, Calonectria, representing a single name for this monophyletic genus. Dichotomous and synoptic keys to all Calonectria spp. currently recognised are also provided. …..More info

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The Fungal Biodiversity Centre (CBS) is an independent research institute of the Royal Netherlands Academy of Arts and Sciences, situated on the campus of the largest university in the Netherlands (Utrecht). It studies fungal biodiversity in the widest sense, focusing on three priority areas, agriculture, human health, and industry (indoor air and food). Presently there are 6 research groups with a total of about 80 employees. The institute maintains a large culture collection of fungi and yeasts, and research groups such as those of Pedro Crous (Evolutionary Phytopathology), Robert Samson (Applied and Industrial Mycology), Sybren de Hoog (Origins of Pathogenicity in Clinical Fungi), Teun Boekhout (Yeast and Basidiomycete Research), Ronald de Vries (Fungal Physiology) and Vincent Robert (Bioinformatics).

Phd- Student full time (38 hours/week)
to work on:
How mushrooms feed on sugars: Analysing the molecular mechanism behind gene expression and enzyme production related to utilisation of polysaccharides… read more

Researcher M/F full time (38 hours/week)
Description of the function: The scientist will perform research in the area of the phylogeny, genomics and taxonomy of Hypocrealean fungi, with accent on clinically relevant species. It is the aim that the candidate will become a world expert in medical mycology and be able to establish and lead an active research network. … read more

Analist A (m/v) voor 38 uur per week per 1 augustus 2010 … lees meer