Commelinaceomyces, gen. nov., for four clavicipitaceous species misplaced in Ustilago that infect Commelinaceae

Tanaka, Eiji and Shrestha, Bhushan and Shivas, Roger G. (2020) Commelinaceomyces, gen. nov., for four clavicipitaceous species misplaced in Ustilago that infect Commelinaceae. Mycologia, 112 (3). pp. 649-660. ISSN 0027-5514


Abstract

A fungus causing false smut in the flowers of Murdannia keisak (Commelinaceae, Commelinales, Monocots) in Japan was morphologically identical to Ustilago aneilematis. The fungus infected ovaries of most flowers of host plants. Infected flowers were filled with yellow to orange thickwalled conidia that became olivaceous green at maturity. However, multilocus phylogenetic analysis of DNA sequences (18S, 28S, translation elongation factor 1α [TEF], the largest [RPB1] and the second largest [RPB2] subunit of RNA polymerase II) showed that the fungus belonged to the tribe Ustilaginoideae (Clavicipitaceae, Hypocreales, Ascomycota). Microscopic examination showed that the fungus developed conidia at the apex of conidiogenous cells, in contrast to other species in the Ustilaginoideae that develop conidia pleurogenously. A new genus, Commelinaceomyces, is formally proposed in the Ustilaginoideae to accommodate this fungus. Four species previously misplaced in Ustilago (Ustilaginales, Basidiomycota) are transferred to Commelinaceomyces, including the type of the genus, C. aneilematis, onMurdannia keisak. This is the first report of a clavicipitaceous species infecting host plants in the Commelinaceae.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 16 Jul 2020 01:17
Last Modified: 27 Jul 2020 01:24
Uncontrolled Keywords: Clavicipitaceae; host jump; Metarhizium; Murdannia keisak; Ustilaginoidea usambarensis; Ustilago aneilematis; 5 new taxa
Fields of Research (2008): 06 Biological Sciences > 0605 Microbiology > 060505 Mycology
06 Biological Sciences > 0603 Evolutionary Biology > 060310 Plant Systematics and Taxonomy
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Identification Number or DOI: 10.1080/00275514.2020.1745524
URI: http://eprints.usq.edu.au/id/eprint/38666

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