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Novel Phaeoacremonium species associated with necrotic wood of Prunus trees.

Damm U, Mostert L, Crous PW, Fourie PH - Persoonia (2008)

Bottom Line: Almost all taxa isolated represent new records on Prunus.Five species are newly described, two of which produce a Togninia sexual state.Togninia africana, T. griseo-olivacea and Pm. pallidum are newly described from Prunus armeniaca, while Pm. prunicolum and Pm. fuscum are described from Prunus salicina.

View Article: PubMed Central - PubMed

Affiliation: Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Stellenbosch 7602, South Africa;

ABSTRACT
The genus Phaeoacremonium is associated with opportunistic human infections, as well as stunted growth and die-back of various woody hosts, especially grapevines. In this study, Phaeoacremonium species were isolated from necrotic woody tissue of Prunus spp. (plum, peach, nectarine and apricot) from different stone fruit growing areas in South Africa. Morphological and cultural characteristics as well as DNA sequence data (5.8S rDNA, ITS1, ITS2, beta-tubulin, actin and 18S rDNA) were used to identify known, and describe novel species. From the total number of wood samples collected (257), 42 Phaeoacremonium isolates were obtained, from which 14 species were identified. Phaeoacremonium scolyti was most frequently isolated, and present on all Prunus species sampled, followed by Togninia minima (anamorph: Pm. aleophilum) and Pm. australiense. Almost all taxa isolated represent new records on Prunus. Furthermore, Pm. australiense,Pm. iranianum, T. fraxinopennsylvanica and Pm. griseorubrum represent new records for South Africa, while Pm. griseorubrum, hitherto only known from humans, is newly reported from a plant host. Five species are newly described, two of which produce a Togninia sexual state. Togninia africana, T. griseo-olivacea and Pm. pallidum are newly described from Prunus armeniaca, while Pm. prunicolum and Pm. fuscum are described from Prunus salicina.

No MeSH data available.


Related in: MedlinePlus

Togninia griseo-olivacea teleomorph and anamorph states. a. Perithecium on PDA; b. longitudinal section through perithecium; c. peridium; d, e. asci attached to ascogenous hyphae; f. ascospores; g. asci; h. paraphyses; i. asci attached to ascogenous hyphae. — j–p. Aerial structures on MEA; j. ring-like growth of mycelium with conidiophore (indicated by arrow head); k. conidiophores; l. type III phialides; m. type II phialides; n, o. type I phialides; p. conidia. — q, r. Structures on the surface of and in MEA; q. adelophialides with conidia; r. conidia; all from CBS H-19941 (holotype). a: DM, b–r: DIC. — Scale bars: a = 100 μm; b = 50 μm; c–i = 5 μm; j = 10 μm; j applies to j–r.
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Figure 7: Togninia griseo-olivacea teleomorph and anamorph states. a. Perithecium on PDA; b. longitudinal section through perithecium; c. peridium; d, e. asci attached to ascogenous hyphae; f. ascospores; g. asci; h. paraphyses; i. asci attached to ascogenous hyphae. — j–p. Aerial structures on MEA; j. ring-like growth of mycelium with conidiophore (indicated by arrow head); k. conidiophores; l. type III phialides; m. type II phialides; n, o. type I phialides; p. conidia. — q, r. Structures on the surface of and in MEA; q. adelophialides with conidia; r. conidia; all from CBS H-19941 (holotype). a: DM, b–r: DIC. — Scale bars: a = 100 μm; b = 50 μm; c–i = 5 μm; j = 10 μm; j applies to j–r.

Mentions: Togninia griseo-olivacea Damm, L. Mostert & Crous, sp. nov. — MycoBank 505137; Fig. 7


Novel Phaeoacremonium species associated with necrotic wood of Prunus trees.

Damm U, Mostert L, Crous PW, Fourie PH - Persoonia (2008)

Togninia griseo-olivacea teleomorph and anamorph states. a. Perithecium on PDA; b. longitudinal section through perithecium; c. peridium; d, e. asci attached to ascogenous hyphae; f. ascospores; g. asci; h. paraphyses; i. asci attached to ascogenous hyphae. — j–p. Aerial structures on MEA; j. ring-like growth of mycelium with conidiophore (indicated by arrow head); k. conidiophores; l. type III phialides; m. type II phialides; n, o. type I phialides; p. conidia. — q, r. Structures on the surface of and in MEA; q. adelophialides with conidia; r. conidia; all from CBS H-19941 (holotype). a: DM, b–r: DIC. — Scale bars: a = 100 μm; b = 50 μm; c–i = 5 μm; j = 10 μm; j applies to j–r.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2865348&req=5

Figure 7: Togninia griseo-olivacea teleomorph and anamorph states. a. Perithecium on PDA; b. longitudinal section through perithecium; c. peridium; d, e. asci attached to ascogenous hyphae; f. ascospores; g. asci; h. paraphyses; i. asci attached to ascogenous hyphae. — j–p. Aerial structures on MEA; j. ring-like growth of mycelium with conidiophore (indicated by arrow head); k. conidiophores; l. type III phialides; m. type II phialides; n, o. type I phialides; p. conidia. — q, r. Structures on the surface of and in MEA; q. adelophialides with conidia; r. conidia; all from CBS H-19941 (holotype). a: DM, b–r: DIC. — Scale bars: a = 100 μm; b = 50 μm; c–i = 5 μm; j = 10 μm; j applies to j–r.
Mentions: Togninia griseo-olivacea Damm, L. Mostert & Crous, sp. nov. — MycoBank 505137; Fig. 7

Bottom Line: Almost all taxa isolated represent new records on Prunus.Five species are newly described, two of which produce a Togninia sexual state.Togninia africana, T. griseo-olivacea and Pm. pallidum are newly described from Prunus armeniaca, while Pm. prunicolum and Pm. fuscum are described from Prunus salicina.

View Article: PubMed Central - PubMed

Affiliation: Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Stellenbosch 7602, South Africa;

ABSTRACT
The genus Phaeoacremonium is associated with opportunistic human infections, as well as stunted growth and die-back of various woody hosts, especially grapevines. In this study, Phaeoacremonium species were isolated from necrotic woody tissue of Prunus spp. (plum, peach, nectarine and apricot) from different stone fruit growing areas in South Africa. Morphological and cultural characteristics as well as DNA sequence data (5.8S rDNA, ITS1, ITS2, beta-tubulin, actin and 18S rDNA) were used to identify known, and describe novel species. From the total number of wood samples collected (257), 42 Phaeoacremonium isolates were obtained, from which 14 species were identified. Phaeoacremonium scolyti was most frequently isolated, and present on all Prunus species sampled, followed by Togninia minima (anamorph: Pm. aleophilum) and Pm. australiense. Almost all taxa isolated represent new records on Prunus. Furthermore, Pm. australiense,Pm. iranianum, T. fraxinopennsylvanica and Pm. griseorubrum represent new records for South Africa, while Pm. griseorubrum, hitherto only known from humans, is newly reported from a plant host. Five species are newly described, two of which produce a Togninia sexual state. Togninia africana, T. griseo-olivacea and Pm. pallidum are newly described from Prunus armeniaca, while Pm. prunicolum and Pm. fuscum are described from Prunus salicina.

No MeSH data available.


Related in: MedlinePlus