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- Title
ATRADIDYMELLA MUSCIVORA GEN. ET SP. NOV. (PLEOSPORALES) AND ITS ANAMORPH PHOMA MUSCIVORA SP. NOV.: A NEW PLEOMORPHIC PATHOGEN OF BOREAL BRYOPHYTES.
- Authors
Davey, Marie L.; Currah, Randolph S.
- Abstract
During a survey of bryophilous fungi from boreal and montane habitats, 12 isolates of a hitherto unknown plant pathogeiiic member of the Pleosporales were recovered from Aulaco,nnium palustre, Hylocomiurn splendens, and Polytrichuin juniperinuin, and described as Atradidymella inuscivora gen. et sp. nov. Atradidymella is characterized by minute, unilocular, setose pseudothecia having 2-3 wall layers; brown, fusiform, 1-septate ascospores; and a Phoma anamorph. The genus is distinguished from all other pleosporalean genera with brown, fusiform ascospores on the basis of ascospore and pseudothecium morphology and a highly reduced stroma that is localized within a single host cell. Atradidyrnella inuscivora is distinguished by its minute pseudothecia (<115 μm) and ascospores that are slightly allantoid and constricted at the septum with the upper cell often wider than the lower. Its anamorph, Phoma muscivora sp. nov., is morphologically distinguishable from P. herbaruin in having smaller conidia. Parsimony analysis of the ITS rDNA region indicates A. muscivora has affinities to the Phonw-Ascochyta-Didyinella dade that is sister to the Phaeosphaeriaceae within the Pleosporales.
- Subjects
NOCTUIDAE; PLEOSPORALES; FUNGI imperfecti; POLYMORPHISM (Crystallography); PARSIMONIOUS models; RECOMBINANT DNA
- Publication
American Journal of Botany, 2009, Vol 96, Issue 7, p1281
- ISSN
0002-9122
- Publication type
Article
- DOI
10.3732/ajb.0900010