3 Systematics of the Straminipila: Labyrinthulomycota, Hyphochytriomycota, and Oomycota

Beakes, Gordon W.; Honda, Daiske; Thines, Marco

doi:10.1007/978-3-642-55318-9_3

Cited by 92 publications

(95 citation statements)

References 275 publications

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“…While molecular phylogenetics and systematics have advanced the higher-level resolution of protists considerably over the last decade or so, including the Labyrinthulea (or Labyrinthulomycota) (Anderson and Cavalier-Smith 2012;Beakes et al 2014), revision at the lower levels has yet to be undertaken for the genus Labyrinthula. Species limits in the genus Labyrinthula have long been considered equivocal (Young 1943), and is reflected by three of 13 species considered doubtful, and another eight excluded as synonyms, or considered nomen nudum or of another family, in Dick's (2001) treatment of the group.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, at the time of this analysis, the only studies to couple broader assays (across-host-species and large geographic ranges) of isolate pathogenicity with molecular identification are from terrestrial systems, which suggest a hidden diversity of pathogenic and non-pathogenic Labyrinthula for Poaceae hosts (Craven et al 2005;Douhan et al 2009). Nevertheless, while the higher classification of Labyrinthulidae has seen progress (Adl et al 2005(Adl et al , 2007Tsui et al 2009;Anderson and CavalierSmith 2012;Beakes et al 2014), the elucidation of Labyrinthula species has been paltry. Regardless of distinction, outbreaks of seagrass wasting disease have had significant impacts on coastal ecosystems.…”

Section: Communicated By Kenneth Duntonmentioning

confidence: 99%

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Functional, Phylogenetic and Host-Geographic Signatures of Labyrinthula spp. Provide for Putative Species Delimitation and a Global-Scale View of Seagrass Wasting Disease

Martín

Chiari

Boone

et al. 2016

Estuaries and Coasts

102

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Seagrass meadows form ecologically and economically valuable coastal habitat on every continental margin except the Antarctic, but their areal extent is declining by approximately 2-5 % per year. Seagrass wasting disease is a contributing factor in these declines, with the protist Labyrinthula identified as the etiologic agent. To help elucidate the role of Labyrinthula spp. in global seagrass declines, we surveyed roughly one fourth of all seagrass species to identify Labyrinthula diversity at the strain and/or species level, combining results from culturing methods and two common nuclear DNA markers: the ITS and 18S regions of the ribosomal RNA gene complex. After assaying a subset of the resulting isolates (of which 170 were newly sequenced), we produced a cladogenic context for putative seagrasspathogenic versus non-pathogenic Labyrinthula while also defining host and geographic ranges. Assays also suggest that pathogenicity is consistently high (when present; and, even when comparing susceptibility of US East-versus West Coast Zostera marina hosts) while virulence is variable, that some isolate-host combinations have the potential for host cross-infection, and that several modes of transmission can be effective. Taken together, these data provide additional means for delimiting putative species of Labyrinthula, suggesting at least five seagrass-pathogenic and perhaps ten or more non-pathogenic marine Bspecies^, yielding a working definition for ecologists and epidemiologists attempting to reconcile the sundry data related to seagrass wasting disease.

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Section: Discussionmentioning

confidence: 99%

Section: Communicated By Kenneth Duntonmentioning

confidence: 99%

Functional, Phylogenetic and Host-Geographic Signatures of Labyrinthula spp. Provide for Putative Species Delimitation and a Global-Scale View of Seagrass Wasting Disease

Martín

Chiari

Boone

et al. 2016

Estuaries and Coasts

102

View full text Add to dashboard Cite

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“…To date, approximately 2000 species striving in different habitats ranging from the arctic to tropics have been described [1]. The discovery of new lineages that branch outside the major genera of Peronosporales [2][3][4][5][6][7] has fueled research into the evolution and diversity of cultivable oomycetes of the Peronosporales [8]. Of the recently-described oomycete lineages, the former K-clade Pythium species [5,9] have attracted intense research and were segregated taxon from Pythium in 2010 [2] as members of the new genus Phytopythium on the basis of phylogenetic position and morphology.…”

Section: Introductionmentioning

confidence: 99%

Phytopythium leanoi sp. nov. and Phytopythium dogmae sp. nov., Phytopythium species associated with mangrove leaf litter from the Philippines

et al. 2018

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The genus Phytopythium is a monophyletic taxon of the Peronosporaceae with characteristics intermediate between Phytophthora and Pythium. In the Philippines, reports of Phytopythium are scarce, with the mangrove-swamp-inhabiting species Phytopythium kandeliae being the only species recorded to date. It was the aim of the current study to investigate the diversity of Phytopythium in mangrove habitats in more detail. Based on culture characteristics, morphology, and molecular phylogenetic position, two new species of Phytopythium are described from Philippine mangroves, P. leanoi USTCMS 4102 and P. dogmae USTCMS 4101. Phytopythium leanoi is a species morphologically similar to P. kandeliae, but with the ability to develop gametangia in a homothallic fashion. The other new species, P. dogmae, is characterized by having a short discharge tube, semipapillate to papillate sporangia and frequently exhibiting a clustering of two sporangia per sporangiogenic hypha. With the addition of the two species described in this study, the genus Phytopythium has grown from around 10 to beyond 20 recognized species over the past decade, and it seems likely that several more species of this genus await discovery.

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“…Funguslike organisms are found in at least four large clades in addition to the opisthokonts: Straminopila, Rhizaria, Excavata, and Amoebozoa. Most importantly, socially, is the Straminopila (Beakes et al 2014), home to the Oomycota, Labyrinthulomycota, and Hyphochytriomycetes. The Oomycota harbors the plant destroyers, literally, Phytophthora and relatives.…”

Section: Convergent Evolution Of Funguslike Protistsmentioning

confidence: 99%

1 Fungi from PCR to Genomics: The Spreading Revolution in Evolutionary Biology

Taylor

Berbee

2014

Systematics and Evolution

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3 Systematics of the Straminipila: Labyrinthulomycota, Hyphochytriomycota, and Oomycota

Cited by 92 publications

References 275 publications

Functional, Phylogenetic and Host-Geographic Signatures of Labyrinthula spp. Provide for Putative Species Delimitation and a Global-Scale View of Seagrass Wasting Disease

Functional, Phylogenetic and Host-Geographic Signatures of Labyrinthula spp. Provide for Putative Species Delimitation and a Global-Scale View of Seagrass Wasting Disease

Phytopythium leanoi sp. nov. and Phytopythium dogmae sp. nov., Phytopythium species associated with mangrove leaf litter from the Philippines

1 Fungi from PCR to Genomics: The Spreading Revolution in Evolutionary Biology

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