Article

Anther smut fungi on monocots

Universität Tübingen, Botanisches Institut, Lehrstuhl Spezielle Botanik und Mykologie, Tübingen, Germany.
Mycological Research (Impact Factor: 2.81). 11/2008; 112(Pt 11):1297-306. DOI: 10.1016/j.mycres.2008.06.002
Source: PubMed

ABSTRACT

Teliospores, hyphal septa, cellular interactions, and nucleotide sequences from the ITS and LSU region of the rRNA gene of specimens of Ustilago vaillantii s. lat. on Muscari and Scilla species were examined and compared with findings in other Ustilaginomycotina. The data show that U. vaillantii s. lat. specimens belong to the Urocystales and represent the sister group of the Urocystaceae, standing well apart from Vankya heufleri and V. ornithogali. Within the Urocystales, U. vaillantii s. lat. is unique in sporulating in the anthers of the host plants. Accordingly, the new genus Antherospora is proposed for the anther smuts on Hyacinthaceae. In addition, our data show that there is a stringent phylogenetic correlation between the specimens of Antherospora and their respective hosts. Thus, the specimens on Scilla spp. as well as those on Muscari spp. form highly supported monophyla. Furthermore, on Scilla a phylogenetic dichotomy exists between the specimens infecting Scilla bifolia and those infecting S. vindobonensis, with the specimens of the two host species showing a difference of 17bp in the ITS nucleotide sequences. Therefore, A. vindobonensis is described as a new species, and A. scillae and A. vaillantii are proposed as new combinations. Consequently, because of their sporulation in anthers and their parasitism on species of other genera of the Hyacinthaceae, Ustilago albucae, U. peglerae, U. tourneuxii, and U. urgineae are also ascribed to Antherospora as new combinations. Descriptions are given for all species.

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    • "Thus, the combination of morphological, ecological and molecular characters are valuable for correct species identification. This polyphasic approach has often been used to differentiate fungal species including smuts (Lutz et al. 2008; Bauer et al. 2008; Piątek et al. 2012, 2013; Savchenko et al. 2013, 2014; Vasighzadeh et al. 2014), and it was recently named the Consolidated Species Concept (Quaedvlieg et al. 2014). Strictly defined species, with reference sequences deposited in public repositories (such as NCBI's GenBank), are essential for progress in plant pathology. "
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    • "In all analyses, the Antherospora species included in previous studies (Bauer et al. 2008, Piątek et al. 2011) were inferred with high support values, and phylogenetic relationships were as in Bauer et al. (2008), Piątek et al. (2011), and Vánky et al. (2008). All Antherospora specimens from Muscari spp. "
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