Problems in the Study of Plant Rusts

Arthur, J. C.

doi:10.2307/2478644

Cited by 7 publications

(21 citation statements)

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“…Otth. However, this general reliance on teliospore characters as the basis for major subdivisions of rusts was questioned, and other characters were later considered for systematic revisions, such as those related to the spermagonial (Arthur 1903;Hiratsuka and Sato 1982;Cummins and Hiratsuka 2003) or uredinial (Kenney 1970) spore stages, spore ontogeny (Hughes 1970), host association (Arthur 1903), complexity of life cycle (Savile 1976(Savile , 1978 and DNA sequences (Maier et al 2003;Aime 2006;Maier et al 2007). Recently, Cummins and Hiratsuka (2003) proposed a 13-family classification, with Melampsora as the only genus in the family Melampsoraceae.…”

Section: The Genus Melampsora Delineation Within the Rust Ordermentioning

confidence: 99%

“…the tendency of morphological characters to overlap between species and genera, the taxonomy of rusts is an ongoing challenge (Arthur 1903;Hiratsuka and Sato 1982). The genus Melampsora is no exception.…”

Section: The Genus Melampsora Delineation Within the Rust Ordermentioning

confidence: 99%

“…Host range variations, the complexity of life cycles and similarities among spore characteristics make differentiation and recognition at the species level difficult. Thus, to date, there is no consensus as to how many species should be recognized in the genus Melampsora, including those species on poplar (Arthur 1903;Bagyanarayana 1998;.…”

Section: The Genus Melampsora Delineation Within the Rust Ordermentioning

confidence: 99%

“…The reproductive structures produced during some stages of their life cycles can produce abundant orange-or brownish-colored spores, giving infected plants the appearance of being dusted with iron rust, which led to their common name (Arthur 1903). The rusts are traditionally classified in the order Uredinales (current name Pucciniales) of the phylum Basidiomycota.…”

Section: Introductionmentioning

confidence: 99%

“…Reliable identification is the critical first step in assessing potential impact and disease risk, and for determining management options for poplar and willow cultivation. However, the taxonomy of Melampsora has presented notorious difficulties for taxonomists and pathologists (Arthur 1903). Like the other rusts, species were established based mainly on their morphological characters, but overlapping criteria and unclear morphological distinctions between species have led to confusion.…”

Section: Introductionmentioning

confidence: 99%

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Poplar rust systematics and refinement of Melampsora species delineation

et al. 2011

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We present a review of previous taxonomic treatments of the Melampsora species occurring on poplar and describe the features associated with each spore stage in a typical poplar rust life cycle. The morphological, biological and ecological characters traditionally used for taxonomy are summarized for all Melampsora taxa, including 17 accepted species, 2 formae speciales and 2 hybrids, currently listed in the literature as pathogenic on Populus spp. We discuss the historical taxonomic decisions that led to nomenclatural and classification complications for this group of rusts, and highlight the lack of type material for three species known only from the original collections: M. cumminsii, M. multa, and M. osmaniensis. Even when all the traditional features are considered, the taxonomy of Melampsora poplar rust species remains uncertain and incomplete. An overview of recent molecular studies suggests the need for a comprehensive revision of species concepts, based on phylogenetic relationships. To that end, we propose a polyphasic approach, including the Genealogical Concordance Phylogenetic Species Recognition method, be used to build robust and meaningful systematic framework for the Melampsora poplar rusts.

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