Phytophthora niederhauserii sp. nov., a polyphagous species associated with ornamentals, fruit trees and native plants in 13 countries
Author(s)Abad, Gloria Z.
Abad, Jorge A.
Cacciola, Santa Olga
Pérez Sierra, Ana María
Abad Campos, Paloma
Alvarez-Bernaola, Luis A.
Herrero, Maria Luz
Burgess, Treena I.
Cunnington, James H.
Smith, Ian W.
Contributor(s)Universitat Politècnica de València. Departamento de Ecosistemas Agroforestales - Departament d'Ecosistemes Agroforestals
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Abstract[EN] A non-papillate, heterothallic Phytophthora
species first isolated in 2001 and subsequently from
symptomatic roots, crowns and stems of 33 plant
species in 25 unrelated botanical families from 13
countries is formally described here as a new species.
Symptoms on various hosts included crown and stem
rot, chlorosis, wilting, leaf blight, cankers and
gumming. This species was isolated from Australia,
Hungary, Israel, Italy, Japan, the Netherlands, Norway,
South Africa, Spain, Taiwan, Turkey, the United
Kingdom and United States in association with shrubs
and herbaceous ornamentals grown mainly in greenhouses.
The most prevalent hosts are English ivy
(Hedera helix) and Cistus (Cistus salvifolius). The
association of the species with acorn banksia (Banksia
prionotes) plants in natural ecosystems in Australia, in
affected vineyards (Vitis vinifera) in South Africa and
almond (Prunus dulcis) trees in Spain and Turkey in
addition to infection of shrubs and herbaceous
ornamentals in a broad range of unrelated families
are a sign of a wide ecological adaptation of the
species and its potential threat to agricultural and
natural ecosystems. The morphology of the persistent
non-papillate ellipsoid sporangia, unique toruloid
lobate hyphal swellings and amphigynous antheridia
does not match any of the described species.
Phylogenetic analysis based on sequences of the ITS
rDNA, EF-1a, and b-tub supported that this organism
is a hitherto unknown species. It is closely related to
species in ITS clade 7b with the most closely related
species being P. sojae. The name Phytophthora
niederhauserii has been used in previous studies
without the formal description of the holotype. This
name is validated in this manuscript with the formal
description of Phytophthora niederhauserii Z.G. Abad
et J.A. Abad, sp. nov. The name is coined to honor Dr
John S. Niederhauser, a notable plant pathologist and
the 1990 World Food Prize laureate.
Western Australian Department of Agriculture VPRI 32086
North Carolina Department of Agriculture and Consumer Services PH2424
Hungarian Scientific Research Fund (OTKA) K61107
Hungarian Scientific Research Fund (OTKA) K101914
Italian Ministry of University and Research (MIUR)
Swiss State Secretariat for Education and Research C09.0139
European Union FP7- KBBE-2009-3 ISEFOR 245268
COST action FP0801
Abad, GZ.; Abad, JA.; Cacciola, SO.; Pane, A.; Faedda, R.; Moralejo, E.; Pérez Sierra, AM.... (2014). Phytophthora niederhauserii sp. nov., a polyphagous species associated with ornamentals, fruit trees and native plants in 13 countries. Mycologia. 103(3):431-447. doi:10.3852/ 12.119.