How do obligate parasites evolve? A multi-gene phylogenetic analysis of downy mildews

Göker, Markus; Voglmayr, Hermann; Riethmüller, Alexandra; Oberwinkler, Franz

doi:10.1016/j.fgb.2006.07.005

Cited by 129 publications

(125 citation statements)

References 75 publications

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“…However, recent molecular studies have shown that all the leaf-infecting genera of graminocolous downy mildews (e.g., Peronosclerospora, Sclerospora, etc.) are scattered among other downy mildew genera in the Peronosporales (Hudspeth et al, 2003;Go¨ker et al, 2007;Thines et al, 2008). These graminaceous pathogens do belong to the Peronosporales, but there is no molecular support for retaining the Sclerosporales as a separate order or family.…”

Section: A Place For the Water Molds -A Fishy Talementioning

confidence: 99%

The Evolutionary Phylogeny of Oomycetes—Insights Gained from Studies of Holocarpic Parasites of Algae and Invertebrates

Beakes

Sekimoto

2008

Oomycete Genetics and Genomics

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Section: A Place For the Water Molds -A Fishy Talementioning

confidence: 99%

The Evolutionary Phylogeny of Oomycetes—Insights Gained from Studies of Holocarpic Parasites of Algae and Invertebrates

Beakes

Sekimoto

2008

Oomycete Genetics and Genomics

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“…We retain the name Oomycetes because of its wider currency in the mycological and plant pathological communities. Oomycetes are an ancient group, but their evolutionary history is mostly inferred from molecular phylogenetic studies of living species [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Bhattacharya et al [17] suggested a mean age for the split between Oomycetes and Bacillariophyta of 936 Ma (range: 1150 -770 Ma).…”

Section: Introductionmentioning

confidence: 99%

Evidence of parasitic Oomycetes (Peronosporomycetes) infecting the stem cortex of the Carboniferous seed fernLyginopteris oldhamia

Strullu‐Derrien

Kenrick

Rioult³

et al. 2010

Proc. R. Soc. B.

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Thin sections of petrified fossils made during the latter part of the nineteenth and early twentieth centuries to investigate the internal tissue systems of plants now provide an important new source of information on associated micro-organisms. We report a new heterokont eukaryote (Combresomyces williamsonii sp. nov.) based on exquisitely preserved fossil oogonia, antheridia and hyphae from the Carboniferous (Pennsylvanian: Bashkirian stage) of UK. The structure of the oogonia and antheridia and features observed within the hyphae demonstrate a relationship with Oomycetes (Peronosporomycetes). The fossil microorganism was documented in situ in petrified stem cortex and rootlets of the extinct seed fern Lyginopteris oldhamia (Pteridospermales). The main observed features point towards a pythiaceous Oomycete but links to biotrophic Albuginales or Peronosporaceae cannot be ruled out owing to the observation of a possible haustorium. Our study provides the earliest evidence for parasitism in Oomycetes.

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“…However, it was not identified on live plants until 1903 in Moscow by Rostovzev (Lebeda and Cohen 2011). Although the taxonomy of this pathogen has varied, it is currently classified in Kingdom Straminipila, Phylum Oomycota, Class Oomycetes, Order Peronsporales, Family Peronosporaceae, Genus Pseudoperonospora, Species Pseudoperonospora cubensis (Göker et al 2007;Savory et al 2011). Like other oomycetes, Ps.…”

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confidence: 99%

“…Like other oomycetes, Ps. cubensis is thiamine-dependent, forms haustoria, and is an obligate, meaning that it requires a host for survival (Göker et al 2007). Similar to other species in Peronospora and Pseudoperonospora, it has colored conidia, which may aid in the longevity of sporangia, as they are greater protected from solar radiation during wind dispersal (Göker et al 2007).…”

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confidence: 99%

“…cubensis is thiamine-dependent, forms haustoria, and is an obligate, meaning that it requires a host for survival (Göker et al 2007). Similar to other species in Peronospora and Pseudoperonospora, it has colored conidia, which may aid in the longevity of sporangia, as they are greater protected from solar radiation during wind dispersal (Göker et al 2007). Pseudoperonospora is distinguished from Peronspora because it has porous spore walls, germinates to infective zoospores, and has sporangiophore branches that are at acute angles (Palti and Cohen 1980).…”

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confidence: 99%

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A genomics perspective on cucurbit-oomycete interactions

Burkhardt

Day

2013

Plant Biotechnology

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Pseudoperonospora cubensis and Phytophthora capsici are plant pathogenic oomycetes that are severe threats to cucurbit cultivation because of the their global distribution, their broad host range among the Cucurbitaceae family, and their ability to overcome susceptibilities to host, environment, and chemical management. Historically, these pathogens have been extensively studied in terms of their life cycles and infection strategies in order to determine appropriate methods to manage disease. In recent years, the genomes of both pathogens have been sequenced, which will lead to greater opportunities for pathogen detection and will help researchers to better understand the host-pathogen interaction. In Ps. cubensis, the transcriptomes of both Ps. cubensis and Cucumis sativus (cucumber) have been sequenced, and this data is being analyzed to determine the function of Ps. cubensis effectors and the role of alternative splicing in the regulation of pathogen gene expression. Previous and ongoing work is being done to determine cucumber genes involved in resistance. In P. capsici, effectors have been identified in the genome sequence, and the genome being used to identify variation in different P. capsici isolates. Future work is needed to give biological meaning to genomics data and to determine mechanisms of pathogenicity in oomycetes and resistance in cucurbits. Herein, we will present an overview of the current and future objectives of genome-based research in this area, describing the molecular mechanisms of pathogen virulence and host response to infection.

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How do obligate parasites evolve? A multi-gene phylogenetic analysis of downy mildews

Cited by 129 publications

References 75 publications

The Evolutionary Phylogeny of Oomycetes—Insights Gained from Studies of Holocarpic Parasites of Algae and Invertebrates

The Evolutionary Phylogeny of Oomycetes—Insights Gained from Studies of Holocarpic Parasites of Algae and Invertebrates

Evidence of parasitic Oomycetes (Peronosporomycetes) infecting the stem cortex of the Carboniferous seed fernLyginopteris oldhamia

A genomics perspective on cucurbit-oomycete interactions

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