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oai:www.ideals.illinois.edu:2142/19029 2023-07-10 col_2142_5131 col_2142_14798 com_2142_5130 com_2142_686 com_2142_397

Crane, Jonathan Lake Huhndorf, Sabine Marita 2011-05-07T11:54:49Z 2011-05-07T11:54:49Z 10000-01-01 1990 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. Made available in DSpace on 2011-05-07T11:54:49Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114271.pdf: 5237675 bytes, checksum: c086c98919ca946dfed98734e4f9387a (MD5) Previous issue date: 1990 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:34:10Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:12:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9114271 (UMI)AAI9114271 http://hdl.handle.net/2142/19029 eng Copyright 1990 Huhndorf, Sabine Marita Biology Botany Plant Pathology The systematics of Leptosphaeria species found on the Rosaceae text Crop Sciences Plant Pathology University of Illinois at Urbana-Champaign Dissertation Ph.D.