Phytophthora species from declining Austrocedrus chilensis forests in Patagonia, Argentina

Greslebin, Alina Gabriela; Hansen, E. M.; Winton, L. M.; Rajchenberg, Mario

doi:10.3852/mycologia.97.1.218

Cited by 33 publications

(27 citation statements)

References 32 publications

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“…Using traditional isolation techniques, Phytophthora assemblages have been characterised in Europe and North America , Argentina (Greslebin et al 2005) and South Africa (Oh et al 2013) with many of the same taxa isolated from trees, soil or water samples. The few metabarcoding studies of Phytophthora communities reveal an ever-increasing diversity.…”

Section: Phytophthora Species Detected Within Australiamentioning

confidence: 99%

Distribution and diversity of Phytophthora across Australia

Burgess

White

McDougall

et al. 2017

Pac. Conserv. Biol.

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The introduction and subsequent impact of Phytophthora cinnamomi within native vegetation is one of the major conservation issues for biodiversity in Australia. Recently, many new Phytophthora species have been described from Australia's native ecosystems; however, their distribution, origin, and potential impact remain unknown. Historical bias in Phytophthora detection has been towards sites showing symptoms of disease, and traditional isolation methods show variable effectiveness of detecting different Phytophthora species. However, we now have at our disposal new techniques based on the sampling of environmental DNA and metabarcoding through the use of highthroughput sequencing. Here, we report on the diversity and distribution of Phytophthora in Australia using metabarcoding of 640 soil samples and we compare the diversity detected using this technique with that available in curated databases. Phytophthora was detected in 65% of sites, and phylogenetic analysis revealed 68 distinct Phytophthora phylotypes. Of these, 21 were identified as potentially unique taxa and 25 were new detections in natural areas and/or new introductions to Australia. There are 66 Phytophthora taxa listed in Australian databases, 43 of which were also detected in this metabarcoding study. This study revealed high Phytophthora richness within native vegetation and the additional records provide a valuable baseline resource for future studies. Many of the Phytophthora species now uncovered in Australia's native ecosystems are newly described and until more is known we need to be cautious with regard to the spread and conservation management of these new species in Australia's unique ecosystems.

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Section: Phytophthora Species Detected Within Australiamentioning

confidence: 99%

Distribution and diversity of Phytophthora across Australia

Burgess

White

McDougall

et al. 2017

Pac. Conserv. Biol.

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“…Studies of the diversity of Phytophthora species from streams retrieved between five (Greslebin et al 2005) and eighteen (Reeser et al 2011) species, but most isolate between seven and nine species (Hansen and Delatour 1999, Hwang et al 2011, Huai et al 2013, Hü berli et al 2013. Several Phytophthora species are ubiquitous in riparian ecosystems, including P. chlamydospora, which frequently was found in riparian ecosystems in North America (Reeser et al 2011), Argentina (Greslebin et al 2005) and China (Huai et al 2013). …”

Section: Figmentioning

confidence: 99%

“…parvispora and P. inundata) (Hü berli et al 2013). Likewise a survey of rivers in Argentinean Austrocedrus chilensis stands revealed the presence of five Phytophthora spp., namely P. syringae, P. gonapodyides, P. cambivora, P. chlamydospora and P. taxon raspberry (Greslebin et al 2005). Eight Phytophthora spp.…”

Section: Introductionmentioning

confidence: 99%

MultiplePhytophthoraspecies associated with a single riparian ecosystem in South Africa

Nagel¹,

Slippers²,

Wingfield

et al. 2015

Mycologia

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The diversity of Phytophthora spp. in rivers and riparian ecosystems has received considerable international attention, although little such research has been conducted in South Africa. This study determined the diversity of Phytophthora spp. within a single river in Gauteng province of South Africa. Samples were collected over 1 y including biweekly river baiting with Rhododendron indicum leaves. Phytophthora isolates were identified with phylogenetic analyses of sequences for the internal transcribed spacer (ITS) region of the ribosomal DNA and the mitochondrial cytochrome oxidase c subunit I (coxI) gene. Eight Phytophthora spp. were identified, including a new taxon, P. taxon Sisulu-river, and two hybrid species from Cooke's ITS clade 6. Of these, species from Clade 6 were the most abundant, including P. chlamydospora and P. lacustris. Species residing in Clade 2 also were encountered, including P. multivora, P. plurivora and P. citrophthora. The detection of eight species in this investigation of Phytophthora diversity in a single riparian river ecosystem in northern South Africa adds to the known diversity of this genus in South Africa and globally.

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“…Under favourable conditions some of these Clade 6 species, such as P. inundata, P. taxon PgChlamydo, P. gonapodyides and P. lacustris (e.g. Hansen and Delatour 1999;Greslebin et al 2005;Smith et al 2009;Randall 2011;Reeser et al 2011;Nechwatal et al 2012), can be aggressive tree pathogens (Brasier et al 2003b;Brown and Brasier 2007;Jung 2009). P. inundata has been isolated from dying native vegetation in Western Australia (WA) (Stukely et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Fishing for Phytophthora from Western Australia’s waterways: a distribution and diversity survey

Hüberli

Hardy

White

et al. 2013

Australasian Plant Pathol.

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During one spring season, 12 Phytophthora species, two Phytophthora hybrids, three Halophytophthora species and three Phytopythium species, were isolated from 48 waterways across Western Australia. The waterways were sampled using nylon mesh bags containing leaf baits of up to six different plant species and were isolated by plating necrotic lesions on these onto Phytophthora-selective agar media. Phytophthora species were isolated from all except one waterway. Of the Phytophthora species isolated, eight are known while the remaining four are undescribed taxa. Six of the Phytophthora species and the two hybrids are from clade 6. The two hybrids and P. inundata were the predominant species recovered.Recoveries from different plant leaf baits varied with the best two baits being Pittosporum undulatum and Banksia attentuata; and from these two combined all Phytophthora species were isolated. There was a marked difference in the Phytophthora diversity in the waterways from different regions. This is the first comprehensive study from Australia to examine the Phytophthora communities in waterways, and advances our understanding of the role of these oomycetes in natural and anthropized ecosystems.

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Phytophthora species from declining Austrocedrus chilensis forests in Patagonia, Argentina

Cited by 33 publications

References 32 publications

Distribution and diversity of Phytophthora across Australia

Distribution and diversity of Phytophthora across Australia

MultiplePhytophthoraspecies associated with a single riparian ecosystem in South Africa

Fishing for Phytophthora from Western Australia’s waterways: a distribution and diversity survey

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