Persoonia (2009) 22, 95-110

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T. Jung and T.I. Burgess (2009)
Re-evaluation of Phytophthora citricola isolates from multiple woody hosts in Europe and North America reveals a new species, Phytophthora plurivora sp. nov.
Persoonia 22, 95-110
Abstract: During large-scale surveys for soilborne Phytophthora species in forests and semi-natural stands and nurseries in Europe during the last decade, homothallic Phytophthora isolates with paragynous antheridia, semi-papillate persistent sporangia and a growth optimum around 25 °C which did not form catenulate hyphal swellings, were recovered from 39 host species in 16 families. Based on their morphological and physiological characters and the similarity of their ITS DNA sequences with P. citricola as designated on GenBank, these isolates were routinely identified as P. citricola. In this study DNA sequence data from the internal transcribed spacer regions (ITS1 and ITS2) and 5.8S gene of the rRNA operon, the mitochondrial cox1 and β-tubulin genes were used in combination with morphological and physiological characteristics to characterise these isolates and compare them to the ex-type and the authentic type isolates of P. citricola, and two other taxa of the P. citricola complex, P. citricola I and the recently described P. multivora. Due to their unique combination of morphological, physiological and molecular characters these semipapillate homothallic isolates are described here as a new species, P. plurivora sp. nov.
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Database assignments for author(s): Thomas Jung, Treena Burgess

Research topic(s) for pests/diseases/weeds:
molecular biology - genes

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Phytophthora plurivora Beech (Fagus) Austria
Phytophthora plurivora Beech (Fagus) Czech Republic
Phytophthora plurivora Beech (Fagus) Germany
Phytophthora plurivora Beech (Fagus) Slovenia
Phytophthora plurivora Beech (Fagus) Switzerland
Phytophthora plurivora Maple (Acer) Germany
Phytophthora plurivora Hemlock (Tsuga) Germany
Phytophthora plurivora Alder (Alnus) Germany
Phytophthora plurivora Horse-chestnut/buckeye (Aesculus) Germany
Phytophthora plurivora Japanese cypress and relatives (Chamaecyparis) Germany
Phytophthora plurivora Rhododendron (crop) Germany
Phytophthora plurivora Rhododendron (crop) Italy
Phytophthora citricola Citrus (genus) Japan
Phytophthora citricola Citrus (genus) Taiwan
Phytophthora citricola Raspberry/blackberry (Rubus) Ireland
Phytophthora citricola Oak (Quercus) U.S.A. (NE)
Phytophthora citricola Beech (Fagus) U.S.A. (NE)
Phytophthora citricola Pine (Pinus) U.S.A. (mid N)
Phytophthora citricola Maple (Acer) U.S.A. (mid N)
Phytophthora citricola Hemlock (Tsuga) Switzerland
Phytophthora citricola Rhododendron (crop) Germany
Phytophthora multivora Alfalfa/lucerne (Medicago sativa) South Africa
Phytophthora multivora Eucalypt (Eucalyptus) U.S.A. (NW)
Phytophthora multivora Banksia (crop) U.S.A. (NW)