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Title:The systematics of Leptosphaeria species found on the Rosaceae
Author(s):Huhndorf, Sabine Marita
Doctoral Committee Chair(s):Crane, Jonathan Lake
Department / Program:Crop Sciences
Discipline:Plant Pathology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Plant Pathology
Abstract:This dissertation reassesses the taxonomic position of species of Leptosphaeria described from plants in the family Rosaceae. In doing so, a narrow concept of Leptosphaeria based on its type species is substantiated and strengthened. The characteristics of superficial ascocarps with scleroplectenchymatous wall cells and ascospores which are fusiform, 3-to-multiseptate remain important in delimiting the genus. Anamorphs were not considered because only type or herbarium specimens were studied.
A survey of twenty-eight species of Leptosphaeria described from Rosaceous hosts reveals that most of these species do not possess the diagnostic characteristics of the genus. Instead, they are distributed among twelve genera, twenty species and one variety in the Ascomycota. The species are described and illustrated. One new name is proposed for a species of Leptosphaeria. To accommodate the species excluded from Leptosphaeria, eight new combinations are proposed.
Six species on Rosaceous hosts are accepted in Leptosphaeria: L. doliolum, L. dryadophila, L. praetermissa, L. umbrosa, L. cercocarpi and L. coniothyrium.
Issue Date:1990
Rights Information:Copyright 1990 Huhndorf, Sabine Marita
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9114271
OCLC Identifier:(UMI)AAI9114271

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