@ARTICLE{TreeBASE2Ref26438,
author = {Duy Phu Le and Mike Kevin Smith and Elizabeth Aitken},
title = {Species delimitation in Pythium species complexes - the case of Pythium myriotylum Drechsler and Pythium zingiberis Takahashi},
year = {2016},
keywords = {Oomycota, morphology, molecular, taxonomy, pathogenicity },
doi = {},
url = {http://},
pmid = {},
journal = {Mycological Progress},
volume = {},
number = {},
pages = {},
abstract = {Pythium myriotylum and P. zingiberis have both been implicated in soft rot of ginger
(Zingiber spp.). The status of these two taxa as distinct species follows original
descriptions of physiology, morphology and pathogenicity. However, their status has
been questioned by phylogenetic analyses. In this study, putative P. zingiberis isolates
recovered from edible ginger (Zingiber officinale) rhizomes with Pythium soft rot (PSR)
disease sampled from Queensland, Australia, were compared with reference isolates
of P. myriotylum from peanut in Israel (CBS254.70) and P. zingiberis from ginger in
Japan (NBRC30817). All isolates differed slightly in temperature optima for growth and
produced similar sizes of oogonia and oospores. Sequence homology of 20 gene
fragments retrieved from nuclear and mitochondrial genomes ranges from over 99 to
100% to each other. In vitro pathogenicity assays were conducted on excised carrot,
ginger, potato, radish, and sweet potato tuber/root sections and on seeds and
seedlings of cucumber, cauliflower, millet, rye, sweet corn, tomato and wheat with each
of the isolate. The reference isolate P. zingiberis NBRC30817, which previously was
believed to have a narrow host range, was pathogenic on a number of tested plant
species. Analysis of this comprehensive set of data allowed us to assign all tested
isolates, including the isolate P. zingiberis NBRC30817, to the taxon P. myriotylum
thus confirming that the causal pathogen of PSR disease of ginger in Australia is P.
myriotylum.}
}
Trees for Study 20021
Citation title:
"Species delimitation in Pythium species complexes - the case of Pythium myriotylum Drechsler and Pythium zingiberis Takahashi".
Study name:
"Species delimitation in Pythium species complexes - the case of Pythium myriotylum Drechsler and Pythium zingiberis Takahashi".
This study is part of submission 20021
(Status: Published).
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