Phylogenetic relationships of Sphaerophoraceae (Ascomycetes) inferred from SSU rDNA sequences

被引：33

作者：

Wedin, M

Tehler, A

Gargas, A

机构：

[1] Karl Franzens Univ Graz, Inst Bot, A-8010 Graz, Austria

[2] Naturhistoriska Riksmuseet, Sekt Kryptogambot, S-10405 Stockholm, Sweden

[3] Univ Copenhagen, Dept Mycol, DK-1353 Copenhagen, Denmark

来源：

PLANT SYSTEMATICS AND EVOLUTION | 1998年 / 209卷 / 1-2期

关键词：

Fungi; Ascomycetes; Caliciales; Lecanorales; Sphaerophoraceae; Stereocaulaceae; lichens; molecular evolution; phylogeny; small subunit; ribosomal DNA; 18S rDNA;

D O I：

10.1007/BF00991525

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

SSU rDNA was sequenced from the lichenized fungi Bunodophoron scrobiculatum and Leifidium tenerum (Sphaerophoraceae), and Stereocaulon ramulosum and Pilophorus acicularis (Stereocaulaceae) and analysed by maximum parsimony with 44 homologous ascomycete sequences in a cladistic study. A small insertion (c. 60 nt.) was found in the sequence of Leifidium tenerum. Sphaerophoraceae constitutes a strongly supported monophyletic group which groups together with Lecanora dispersa and the Stereocaulaceae. Together with Porpidia crustulata, this larger group is a sistergroup to the Peltigerineae. This analysis thus supports the Lecanorales as monophyletic, including Sphaerophoraceae and the Peltigerineae, but does not provide strong support for this monophyly. The analysis also suggests that the prototunicate ascus in the Sphaerophoraceae is a reversion to the plesiomorphic state. Based on morphological, anatomical and chemical reasons, Sphaerophoraceae is proposed to belong to one of the groups presently included in the paraphyletic suborder Cladoniineae within the Lecanorales.

引用

页码：75 / 83

页数：9

共 33 条

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