Ultrastructure and Comparison of Phymatotrichum omnivorum and Sistotrema brinkmannii

Dong, Sophie; Bloss, H. E.; Alcorn, S. M.

doi:10.2307/3759652

Cited by 5 publications

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“…In contrast, hyphal walls of most Basidiomycota show multiple thin translucent and electron-dense layers ( Bartnicki-Garcia 1987 ). Woronin bodies, diagnostic of filamentous Ascomycota , were discovered by Dong et al (1981) in the hyphae of Phymatotrichopsis omnivora . Despite this strong evidence to indicate that P. omnivora is actually a member of the Ascomycota , the Dictionary of the Fungi ( Kirk et al 2001 ) lists Phymatotrichopsis as “?…”

Section: Introductionmentioning

confidence: 99%

Molecular systematics of the cotton root rot pathogen, <I>Phymatotrichopsis omnivora</I>

Marek¹,

Hansen²,

Romanish³

et al. 2009

Pers - Int Mycol J

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Cotton root rot is an important soilborne disease of cotton and numerous dicot plants in the south-western United States and Mexico. The causal organism, Phymatotrichopsis omnivora (= Phymatotrichum omnivorum), is known only as an asexual, holoanamorphic (mitosporic) fungus, and produces conidia resembling those of Botrytis. Although the corticoid basidiomycetes Phanerochaete omnivora (Polyporales) and Sistotrema brinkmannii (Cantharellales; both Agaricomycetes) have been suggested as teleomorphs of Phymatotrichopsis omnivora, phylogenetic analyses of nuclear small- and large-subunit ribosomal DNA and subunit 2 of RNA polymerase II from multiple isolates indicate that it is neither a basidiomycete nor closely related to other species of Botrytis (Sclerotiniaceae, Leotiomycetes). Phymatotrichopsis omnivora is a member of the family Rhizinaceae, Pezizales (Ascomycota: Pezizomycetes) allied to Psilopezia and Rhizina.

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Section: Introductionmentioning

confidence: 99%

Molecular systematics of the cotton root rot pathogen, <I>Phymatotrichopsis omnivora</I>

Marek¹,

Hansen²,

Romanish³

et al. 2009

Pers - Int Mycol J

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“…(Fig. 3a; Dong et al ., 1981; Hosford and Gries, 1966). Thin (∼5 µm) runner hyphae wrap around the large central hypha, interweaving into a multilayered mycelial strand (Fig.…”

Section: Taxonomy and Life Cyclementioning

confidence: 98%

“…J. Erikss. (Baniecki and Bloss, 1969), but these were subsequently refuted (Dong et al ., 1981; Weresub and Leclair, 1971). Finally, the fungus was renamed Phymatotrichopsis omnivora (Duggar) Hennebert (1973) to reassert its mitosporic affinity to Botrytis ‐like species.…”

Section: Taxonomy and Life Cyclementioning

confidence: 99%

Phymatotrichum (cotton) root rot caused by Phymatotrichopsis omnivora: retrospects and prospects

Uppalapati

Young

Marek

et al. 2010

Molecular Plant Pathology

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“…Trechispora brinkmannii has been reported by Baniecki and Bloss () to be the teleomorph of Phymatotrichopsis omnivora , but this has been considered incorrect by Hennebert () and Dong et al. (). According to the Index Fungorum database (http://www.indexfungorum.org), the current name of T. brinkmannii is Sistotrema brinkmannii , which, based on phylogenetic analyses (Marek et al., ), is a species distinct from P. omnivora .…”

Section: Introductionmentioning

confidence: 99%

“…The taxonomic connection between P. omnivorum and S. brinkmannii was further refuted by Dong et al. (). Hennebert () renamed the pest causing root rot of cotton P. omnivora (Duggar) Hennebert to reassert its mitosporic affinity to Botrytis ‐like species and attributed the species solely to Duggar because conidia were absent in the specimen originally described by Shear ().…”

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confidence: 97%

Pest categorisation of Phymatotrichopsis omnivora

Bragard¹,

Dehnen‐Schmutz²,

Serio³

et al. 2019

EFS2

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The Panel on Plant Health performed a pest categorisation of Phymatotrichopsis omnivora, the causal agent of Phymatotrichum root rot of more than 2,000 dicotyledonous plant species, for the EU. The pest is listed as Trechispora brinkmannii in Annex IAI of Directive 2000/29/EC. P. omnivora is a well‐defined fungal species and reliable methods exist for its detection and identification. It is present in south‐western USA, northern Mexico, Libya and Venezuela. The pest is not known to occur in the EU. P. omnivora has an extremely wide host range; quantitative impacts have been documented for Gossypium spp. (cotton), Medicago sativa (alfalfa), Malus domestica (apple), Prunus persica (peach) and Vitis vinifera (grapevine) as the major cultivated hosts. All major hosts and pathways of entry of the pest into the EU are currently regulated, except for soil and growing media attached or associated with plants originating in Libya. Host availability and climate and edaphic matching suggest that P. omnivora could establish in parts of the EU and further spread mainly by human‐assisted means. The pest infects the roots causing wilting and death of its host plants. The introduction of the pest in the EU territory would potentially cause direct and indirect impacts at least to cotton, alfalfa, apple, peach and grapevine production. The main uncertainties concern the host range, the extrapolation to the EU of the climatic and edaphic conditions favouring the disease in some of the infested areas, the role of conidia in the epidemiology of the disease and the magnitude of potential impacts to the EU. P. omnivora meets all the criteria assessed by EFSA for consideration as potential Union quarantine pest. The criteria for considering P. omnivora as a potential Union regulated non‐quarantine pest are not met, since the pest is not known to occur in the EU.

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Ultrastructure and Comparison of Phymatotrichum omnivorum and Sistotrema brinkmannii

Cited by 5 publications

References 0 publications

Molecular systematics of the cotton root rot pathogen, <I>Phymatotrichopsis omnivora</I>

Molecular systematics of the cotton root rot pathogen, <I>Phymatotrichopsis omnivora</I>

Phymatotrichum (cotton) root rot caused by Phymatotrichopsis omnivora: retrospects and prospects

Pest categorisation of Phymatotrichopsis omnivora

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