The Role of Phytophthora cryptogea and Waterlogging in a Decline of Pinus radiata

Bumbieris, M

doi:10.1071/bt9760703

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…The presence of chlamydospore of P. cryptogea was not in accordance with the descriptions cited by Gallegly and Hong (). Also Erwin and Ribeiro () reported that chlamydospores are not usually known to occur; however, referring to Bumbieris (), they informed that they formed on pine roots in soil. No colony growth was observed on CJA and CMA at 35°C.…”

Section: Resultsmentioning

confidence: 99%

Occurrence of Phytophthora Root and Stem Rot of Kiwifruit in Turkey

Kurbetli¹,

Ozan²

2013

Journal of Phytopathology

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Vine decline of kiwifruit was observed in an orchard in Bartın province of Turkey. Affected vines exhibited poor terminal growth, leaf discoloration and various degrees of dieback, including complete vine death. Symptoms were observed in the field on roots, crowns and stems. Two Phytophthora species were isolated from decayed cortical roots and lower stems of kiwifruits. They were identified as Phytophthora cryptogea and Phytophthora megasperma by their morphological characteristics and the analysis of sequences of the internal transcribed spacer (ITS) region of the rDNA. Pathogenicity of the isolates was tested by stem inoculation on kiwifruit seedlings. After 4 weeks, cankers developed in the plants inoculated with P. cryptogea, while no cankers formed in those inoculated with P. megasperma and in control plants. This is the first report of P. cryptogea causing root and stem rot of kiwifruit in Turkey.

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Section: Resultsmentioning

confidence: 99%

Occurrence of Phytophthora Root and Stem Rot of Kiwifruit in Turkey

Kurbetli¹,

Ozan²

2013

Journal of Phytopathology

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“…have been isolated from Pinus spp. (Erwin & Ribeiro, 1996; Sánchez et al ., 2002; Chavarriaga et al ., 2007), only P. cinammomi (Ali et al ., 1999) , P. citricola (Sandlin et al ., 1992) , P. cryptogea (Bumbieris, 1976) and P. drechsleri (Heather & Pratt, 1975) have been reported to be associated with P. radiata . All are soil–borne pathogens and they do not infect pine shoots and needles.…”

Section: Discussionmentioning

confidence: 99%

Phytophthora pinifolia sp. nov. associated with a serious needle disease of Pinus radiata in Chile

Durán¹,

Gryzenhout²,

Slippers

et al. 2008

Plant Pathology

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During the course of the past three years, a new disease of Pinus radiata , referred to as 'Daño Foliar del Pino' (DFP) has appeared in the Arauco province of Chile and subsequently spread to other areas. The disease is typified by needle infections, exudation of resin at the bases of the needle brachyblasts and, in younger trees, necrotic lesions in the cambium, which eventually girdle the branches. The disease causes the death of young seedlings and mature trees can also succumb after a few years of successive infection, probably hastened by opportunistic fungi such as Diplodia pinea . Isolations on selective medium for Phytophthora spp. led to the consistent isolation of a Phytophthora sp. from needle tissue. DNA sequence comparisons for the ITS rDNA and cox II gene regions, and morphological observation showed that this oomycete represents a previously undescribed species for which the name Phytophthora pinifolia sp. nov. is provided. This new species is characterized by unbranched sporangiophores, and non-papillate, sub-globose to ovoid sporangia that are occasionally free from the sporangiophore with medium length pedicels. Despite using a number of oospore inducing techniques, oogonia/antheridia were not observed in isolates of P. pinifolia . Pathogenicity trials with P. pinifolia showed that it is pathogenic to P. radiata and causes rapid death of the succulent apical parts of young plants. Phytophthora pinifolia is the first Phytophthora known to be associated with needles and shoots of a Pinus sp. and its aerial habit is well matched with the occurrence and symptoms of DFP in Chile.

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“…have been recovered from plantations of non-native species, mainly located in KwaZulu-Natal, Eastern and Western Cape, and Mpumalanga. These include P. boehmeriae, P. cinnamomi , P. cryptogea , P. nicotianae , P. meadii, P. frigida , and P. alticola (Zeijlemaker 1971, Bumbieris 1976, Wingfield & Knox-Davies 1980, Linde et al 1994, Roux & Wingfield 1997, Maseko et al 2001, Maseko et al . 2007).…”

Section: Introductionmentioning

confidence: 99%

Surveys of soil and water reveal a goldmine of Phytophthora diversity in South African natural ecosystems

Gryzenhout

Wingfield

et al. 2013

IMA Fungus

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Phytophthora species are well-known as destructive plant pathogens, especially in natural ecosystems. It is ironic, therefore, how little is known regarding the Phytophthora diversity in South African natural woody ecosystems. In this study, Phytophthora species were isolated using standard baiting techniques from 182 soil and water samples and these were identified based on ITS and coxI sequence data. The 171 resulting Phytophthora isolates resided in 14 taxa including six known species (P. multivora, P. capensis, P. cryptogea, P. frigida, P. cinnamomi, P. cinnamomi var. parvispora), the known but as yet unnamed Phytophthora sp. PgChlamydo, P. sp. emzansi, and P. sp. Kununurra and five novel taxa referred to as P. sp. stellaris, P. sp. Umtamvuna P. sp. canthium, P. sp. xWS, P. sp. xHennops. Four of the new taxa were found exclusively in water and two of these are hybrids. The most commonly isolated species from soil was P. multivora, a species recently described from Western Australia. Phytophthora frigida was isolated for the first time from stream water. With the exception of P. cinnamomi, very little is known regarding the biology, epidemiology or origin of Phytophthora in South Africa.

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The Role of Phytophthora cryptogea and Waterlogging in a Decline of Pinus radiata

Cited by 15 publications

References 6 publications

Occurrence of Phytophthora Root and Stem Rot of Kiwifruit in Turkey

Occurrence of Phytophthora Root and Stem Rot of Kiwifruit in Turkey

Phytophthora pinifolia sp. nov. associated with a serious needle disease of Pinus radiata in Chile

Surveys of soil and water reveal a goldmine of Phytophthora diversity in South African natural ecosystems

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