A papillate Phytophthora species with specificity to Rubus

Kennedy, D. M.; Duncan, James M.

doi:10.1016/s0953-7562(09)80317-1

Cited by 32 publications

(17 citation statements)

References 32 publications

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“…The dimensions of the sporangia and oogonia differed among the isolates, but were still within the relatively wide ranges reported in the literature (Waterhouse 1963;Stamps et al, 1990;Kennedy & Duncan, 1995). The growth rates also differed significantly among the isolates.…”

Section: Discussionsupporting

confidence: 74%

“…Slight morphological variation has also been found in the diameters of oogonia and oospores among the P. cactorum isolates from different hosts, or even from the same host (Kennedy & Duncan, 1995;Hantula et al, 2000). However, the differences in morphology among the isolates from Malus domestica Borkh., B. pendula, Fragaria vesca L. )ananassa and Rhododendron were insufficient for the identification of genetic groups or host specificity (Hantula et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Irrigation water and Phytophthora cactorum in a forest nursery

Rytkönen¹,

Lilja²,

Petäistö³

et al. 2008

Scandinavian Journal of Forest Research

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Phytophthora cactorum (Lebert and Cohn) J. Schrö t is known to cause stem lesions on Betula pendula Roth in Finnish nurseries. It has been suggested that irrigation water may be one source of infection. Therefore, P. cactorum was baited from pond water used for irrigation and direct isolations were made from necrotic stem lesions in a forest nursery during the years 2004Á2006. Morphological characteristics, as well as sequencing of the b-tubulin gene and ITS1 region, confirmed the isolates as P. cactorum. The pathogen was present in the pond every year, but no diseased seedlings were found in 2005. The cultural and morphological characteristics showed high variation among the isolates, but it was not possible to identify the origins of the isolates according to them. In random amplified microsatellite (RAMS) analysis and DNA sequencing, the isolates from the pond and from the stem lesions were genetically similar, and the tested isolates were pathogenic. The results indicate that irrigation water is one source of stem lesion disease, and the microbe can overwinter in the pond. Two separate forms of the b-tubulin gene were detected in all the studied isolates, suggesting that the P. cactorum here carries two b-tubulin gene loci in its genome.

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Section: Discussionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Irrigation water and Phytophthora cactorum in a forest nursery

Rytkönen¹,

Lilja²,

Petäistö³

et al. 2008

Scandinavian Journal of Forest Research

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“…bisheria (Abad et al 2008;Brasier et al 2003a ;Duncan and Kennedy 1987;Ellis et al 1991;Jung et al 2011;Kennedy and Duncan 1995;Washington 1988;Wilcox et al 1993;Wilcox and Latorre 2002). In contrast, many blackberry cultivars appeared to be highly tolerant to Phytophthora.…”

Section: Discussionmentioning

confidence: 99%

Phytophthora bilorbang sp. nov., a new species associated with the decline of Rubus anglocandicans (European blackberry) in Western Australia

et al. 2012

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“…Small (5 mm diam) agar discs bearing mycelium of each of the ten test isolates of each unknown species were placed on the surface of the amended agar and incubated at 20 °C in the dark for 5 d ( [Shepherd, 1976] and [Kennedy and Duncan, 1995]). Three replicate Petri dishes for each of the ten isolates were used and the sensitivity of the isolates to the test compounds was expressed as percentage growth rate versus that of isolates on control Petri dishes that were free of the test compounds.…”

Section: Morphological Cultural and Physiological Characteristicsmentioning

confidence: 99%

Two new Phytophthora species from South African Eucalyptus plantations

Maseko

Burgess

Coutinho

et al. 2007

Mycological Research

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A recent study to determine the cause of collar and root rot disease outbreaks of cold tolerant Eucalyptus species in South Africa resulted in the isolation of two putative new Phytophthora species. Based on phylogenetic comparisons using the ITS and β-tubulin gene regions, these species were shown to be distinct from known species. These differences were also supported by robust morphological characteristics. The names, Phytophthora frigida sp. nov. and Phytophthora alticola sp. nov. are thus provided for these taxa, which are phylogenetically closely related to species within the ITS clade 2 (P. citricola, P. tropicali and P.multivesiculata) and 4 (P. arecae and P. megakarya), respectively. Phytophthora frigida is heterothallic, and produces stellate to rosaceous growth patterns on growth medium, corraloid hyphae, sporangia with a variety of distorted shapes and has the ability to grow at low temperatures. Phytophthora alticola is homothallic and has a slower growth rate in culture. Both P. frigida and P. alticola are pathogenic to Eucalyptus dunnii. In pathogenicity tests, they were, however, less pathogenic than P. cinnamomi, which is a well-known pathogen of Eucalyptus in South Africa.

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A papillate Phytophthora species with specificity to Rubus

Cited by 32 publications

References 32 publications

Irrigation water and Phytophthora cactorum in a forest nursery

Irrigation water and Phytophthora cactorum in a forest nursery

Phytophthora bilorbang sp. nov., a new species associated with the decline of Rubus anglocandicans (European blackberry) in Western Australia

Two new Phytophthora species from South African Eucalyptus plantations

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