Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

A Phylogenetic Redefinition of Anamorph Genera in Mycosphaerella Based on ITS rDNA Sequence and Morphology

Pedro W. Crous, Ji-Chuan Kang and Uwe Braun
Mycologia
Vol. 93, No. 6 (Nov. - Dec., 2001), pp. 1081-1101
DOI: 10.2307/3761670
Stable URL: http://www.jstor.org/stable/3761670
Page Count: 21
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Phylogenetic Redefinition of Anamorph Genera in Mycosphaerella Based on ITS rDNA Sequence and Morphology
Preview not available

Abstract

Anamorph genera associated with Mycosphaerella are separated on a combination of characters such as conidiomatal structure, the nature and arrangement of conidiophores, conidiogenesis, dehiscence scars and pigmentation. To date 27 genera have been reported as anamorphs of Mycosphaerella, 19 of which were included in this study. Based on the phylogeny of the ITS1, 5.8S, and ITS2 rDNA sequence data, Mycosphaerella proved to be monophyletic. The major group consisted of several small clusters correlating to specific anamorph genera, as well as other clusters containing an assemblage of anamorph genera. Although Mycosphaerella is monophyletic, it appears that many of the morphological characters defining different anamorph genera evolved more than once and for the most part do not represent true groups within Mycosphaerella. Nevertheless, the anamorph generic concepts contain valuable information of practical use to plant pathologists and mycologists working with these organisms. Based on these results, as well as a re-evaluation of the criteria upon which anamorph genera are distinguished in this complex, a reduced set of informative criteria and genera are proposed. The degree of scar thickening, darkening and refraction, as well as the presence or absence of pigmentation in conidiophores and conidia still appear to be useful features delimiting anamorph genera of Mycosphaerella.

Page Thumbnails

  • Thumbnail: Page 
1081
    1081
  • Thumbnail: Page 
1082
    1082
  • Thumbnail: Page 
1083
    1083
  • Thumbnail: Page 
1084
    1084
  • Thumbnail: Page 
1085
    1085
  • Thumbnail: Page 
1086
    1086
  • Thumbnail: Page 
1087
    1087
  • Thumbnail: Page 
1088
    1088
  • Thumbnail: Page 
1089
    1089
  • Thumbnail: Page 
1090
    1090
  • Thumbnail: Page 
1091
    1091
  • Thumbnail: Page 
1092
    1092
  • Thumbnail: Page 
1093
    1093
  • Thumbnail: Page 
1094
    1094
  • Thumbnail: Page 
1095
    1095
  • Thumbnail: Page 
1096
    1096
  • Thumbnail: Page 
1097
    1097
  • Thumbnail: Page 
1098
    1098
  • Thumbnail: Page 
1099
    1099
  • Thumbnail: Page 
1100
    1100
  • Thumbnail: Page 
1101
    1101