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Worapong, Jeerapun, Gary Strobel, Bryn Daisy, Uvidelio F. Castillo, Gary Baird & W. M. Hess. Muscodor roseus anam. sp. nov., an endophyte from Grevillea pteridifolia. Mycotaxon 81: 463-475. 2002.

ABSTRACT: Muscodor roseus anam. sp. nov. is described as a deuteromycetous (mycelia sterilia) endophytic fungus bearing molecular relatedness to the ascomycetous genus Xylaria. The fungus is characterized by producing a pinkish, felt-like mycelium on PDA and other media. No fruiting structures or spores of any kind have been found when the fungus has been incubated on multiple synthetic and natural media containing sterilized pieces of the host plant (Grevillea pteridifolia) or other plant materials. The hyphae (0.8-3.6 µm dia.) grow in multiple rope-like strands and these can intertwine to make more complex structures. Frequently seen are tight perfect coils of hyphae (20 µm dia.) containing many loops of a single fungal hypha. The fungus is related to Xylariaceae by virtue of 96-98% similarities of its 18S rDNA (2055 bp) to representative members of this group. Phylogenetic analysis based on 18S sequences showed that M. roseus is taxonomically related to Muscodor albus. Musodor roseus, having two isolates recovered and deposited, also produces a mixture of volatile antibiotics having a musty odor as does M. albus.

KEYWORDS: Xylaria, endophyte, mycelia sterilia, 18S rDNA, volatile antibiotics

Muscodor roseus Worapong, Strobel & W.M. Hess, p. 467

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