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J. Fungi 2016, 2(4), 28; doi:10.3390/jof2040028

Phylogenetic Analysis of the Synnema-Producing Genus Synnemapestaloides

1
Faculty of Agriculture, Tamagawa University, 6-1-1 Tamagawa-gakuen, Machida, Tokyo 194-8610, Japan
2
Graduate School of Agriculture, Tamagawa University, 6-1-1 Tamagawa-gakuen, Machida, Tokyo 194-8610, Japan
3
Mycology & Metabolic Diversity Research Center, Tamagawa University, 6-1-1 Tamagawa-gakuen, Machida, Tokyo 194-8610, Japan
4
Genetic Resources Center, National Agriculture and Food Research Organization, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
5
Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
6
Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
7
Green Doctors, 1-10-13-201 Sagamihara, Chuoku, Sagamihara, Kanagawa 252-0231, Japan
8
Laboratory of Plant Pathology, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: David S. Perlin
Received: 1 September 2016 / Revised: 1 November 2016 / Accepted: 1 November 2016 / Published: 7 November 2016
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Abstract

Synnemapestaloides rhododendri, the type species of the genus Synnemapestaloides, is a pathogen of Rhododendron brachycarpum. This fungus produces six-celled conidia with appendages at both end cells, and are generated by annellidic conidiogenous cells on the synnema. These conidial structures are similar to those of the genus Pestalotia. The monotypic genus Synnemapestaloides is currently classified in the family Amphisphaeriaceae solely based on conidial morphology. Here we demonstrate that Synnemapestaloides represents a distinct genus in the family Sporocadaceae (Amphisphaeriales) based on differences in the nucleotide sequences of the partial large subunit rDNA gene, the rDNA internal transcribed spacer, and the partial β-tubulin. The genus most closely related to Synnemapestaloides is Seimatosporium and the species most similar to Synnemapestaloides rhododendri is Seim. foliicola which produces short synnema-like conidiomata (sporodochia). These results demonstrate that Seim. foliicola should be transferred to Synnemapestaloides, and also demonstrate that Sporocadaceae can have synnematal in addition to pycnidial and acervular conidiomata. View Full-Text
Keywords: Amphisphaeriales; conidiomatal development; Sporocadaceae; Synnemapestaloides Amphisphaeriales; conidiomatal development; Sporocadaceae; Synnemapestaloides
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Watanabe, K.; Sekiguchi, M.; Sato, T.; Hsiang, T.; Kaneko, S.; Tanaka, K.; Kanda, M.; Fujita, N.; Nozawa, S. Phylogenetic Analysis of the Synnema-Producing Genus Synnemapestaloides. J. Fungi 2016, 2, 28.

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