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A new species of the lenticel fungal genus Claviradulomyces (Ostropales) from the Brazilian Atlantic forest tree Xylopia sericea (Annonaceae).

Barreto RW, Johnston PR, Crous PW, Evans HC - IMA Fungus (2012)

Bottom Line: Both species were consistently in association with abnormal lenticular development on their woody hosts.The finding of the second species in the genus Claviradulomyces on a plant from a distantly related family to that of the host of C. dabeicola (Erythroxylaceae) for the genus on a different continent suggests that fungi in this genus may be common on lenticels of other woody plants, and could even have a pantropical distribution.It is possible that fungi in the genus have remained unreported until now because lenticels have remained neglected as a habitat surveyed by mycologists.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Fitopatologia, Universidade Federal de Viçosa, 36750 Viçosa, Minas Gerais, Brazil;

ABSTRACT
Claviradulomyces xylopiae sp. nov. is introduced for a fungus occurring in association with abnormal (enlarged, spongy) lenticels of Xylopia sericea (Annonaceae), a common tree of the Atlantic forest and Cerrado ecosystems in Brazil. This is the second species described in the genus and, although it is morphologically distinct from the type species, C. dabeicola from West Africa, it possesses the same characteristics. Apothecial ascomata have periphysoids and paraphyses that are inflated apically (clavate), and ornamented with denticles (raduliform). Furthermore, similar to the type species, it also has long-cylindric or acerose, aseptate ascospores and conidia. An additional asexual morph was produced in culture and is described. Molecular studies of C. dabeicola and the new species confirmed a placement in Ostropales, although a relationship to Odontotremataceae was not supported. Both species were consistently in association with abnormal lenticular development on their woody hosts. It remains to be ascertained, however, if these are the causal agents of the bark disorders, or, simply, opportunistic colonisers. The finding of the second species in the genus Claviradulomyces on a plant from a distantly related family to that of the host of C. dabeicola (Erythroxylaceae) for the genus on a different continent suggests that fungi in this genus may be common on lenticels of other woody plants, and could even have a pantropical distribution. It is possible that fungi in the genus have remained unreported until now because lenticels have remained neglected as a habitat surveyed by mycologists.

No MeSH data available.


Related in: MedlinePlus

A. Collecting on Xylopia sericea at type locality of Claviradulomyces xylopiae – margin of Atlantic forest, Mata do Seu Nico, Fazenda Bonsucesso, Viçosa, state of Minas Gerais Brazil. B–D. Close-up of bark of X. sericea colonised by C. xylopiae showing hypertrophied lenticels bearing bearing apothecial ascomata, showing fully opened habit (C–D) after 24 h in a humid chamber. Bars: C = 0.5 cm; D = 1 cm.
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Figure 1: A. Collecting on Xylopia sericea at type locality of Claviradulomyces xylopiae – margin of Atlantic forest, Mata do Seu Nico, Fazenda Bonsucesso, Viçosa, state of Minas Gerais Brazil. B–D. Close-up of bark of X. sericea colonised by C. xylopiae showing hypertrophied lenticels bearing bearing apothecial ascomata, showing fully opened habit (C–D) after 24 h in a humid chamber. Bars: C = 0.5 cm; D = 1 cm.

Mentions: Xylopia sericea (Annonaceae) is a fast-growing native tree of the Brazilian Atlantic forest and Cerrado ecosystems (Lorenzi 1992), known locally as pimenteiro. During a collection of entomopathogenic fungi associated with armoured scale insects in the canopy of X. sericea (Fig. 1A), a high proportion of the pruned branches showed abnormal development of lenticels: the latter appearing as prominent eruptions along the branches (Fig. 1B–D). A discomycete fungus was observed consistently colonising the lenticular tissues, which was identified provisionally as similar to Claviradulomyces dabeicola (Evans et al. 2010). On closer inspection, morphological differences were found that distinguished the fungus on X. sericea from C. dabeicola. The fungus was isolated into pure culture, from the sexual morph and from the purported asexual morph, allowing for molecular data to be generated to confirm the sexual relationship. A detailed description of the new species and a discussion of Claviradulomyces phylogeny and its placement within Ostropales are presented.


A new species of the lenticel fungal genus Claviradulomyces (Ostropales) from the Brazilian Atlantic forest tree Xylopia sericea (Annonaceae).

Barreto RW, Johnston PR, Crous PW, Evans HC - IMA Fungus (2012)

A. Collecting on Xylopia sericea at type locality of Claviradulomyces xylopiae – margin of Atlantic forest, Mata do Seu Nico, Fazenda Bonsucesso, Viçosa, state of Minas Gerais Brazil. B–D. Close-up of bark of X. sericea colonised by C. xylopiae showing hypertrophied lenticels bearing bearing apothecial ascomata, showing fully opened habit (C–D) after 24 h in a humid chamber. Bars: C = 0.5 cm; D = 1 cm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3539316&req=5

Figure 1: A. Collecting on Xylopia sericea at type locality of Claviradulomyces xylopiae – margin of Atlantic forest, Mata do Seu Nico, Fazenda Bonsucesso, Viçosa, state of Minas Gerais Brazil. B–D. Close-up of bark of X. sericea colonised by C. xylopiae showing hypertrophied lenticels bearing bearing apothecial ascomata, showing fully opened habit (C–D) after 24 h in a humid chamber. Bars: C = 0.5 cm; D = 1 cm.
Mentions: Xylopia sericea (Annonaceae) is a fast-growing native tree of the Brazilian Atlantic forest and Cerrado ecosystems (Lorenzi 1992), known locally as pimenteiro. During a collection of entomopathogenic fungi associated with armoured scale insects in the canopy of X. sericea (Fig. 1A), a high proportion of the pruned branches showed abnormal development of lenticels: the latter appearing as prominent eruptions along the branches (Fig. 1B–D). A discomycete fungus was observed consistently colonising the lenticular tissues, which was identified provisionally as similar to Claviradulomyces dabeicola (Evans et al. 2010). On closer inspection, morphological differences were found that distinguished the fungus on X. sericea from C. dabeicola. The fungus was isolated into pure culture, from the sexual morph and from the purported asexual morph, allowing for molecular data to be generated to confirm the sexual relationship. A detailed description of the new species and a discussion of Claviradulomyces phylogeny and its placement within Ostropales are presented.

Bottom Line: Both species were consistently in association with abnormal lenticular development on their woody hosts.The finding of the second species in the genus Claviradulomyces on a plant from a distantly related family to that of the host of C. dabeicola (Erythroxylaceae) for the genus on a different continent suggests that fungi in this genus may be common on lenticels of other woody plants, and could even have a pantropical distribution.It is possible that fungi in the genus have remained unreported until now because lenticels have remained neglected as a habitat surveyed by mycologists.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Fitopatologia, Universidade Federal de Viçosa, 36750 Viçosa, Minas Gerais, Brazil;

ABSTRACT
Claviradulomyces xylopiae sp. nov. is introduced for a fungus occurring in association with abnormal (enlarged, spongy) lenticels of Xylopia sericea (Annonaceae), a common tree of the Atlantic forest and Cerrado ecosystems in Brazil. This is the second species described in the genus and, although it is morphologically distinct from the type species, C. dabeicola from West Africa, it possesses the same characteristics. Apothecial ascomata have periphysoids and paraphyses that are inflated apically (clavate), and ornamented with denticles (raduliform). Furthermore, similar to the type species, it also has long-cylindric or acerose, aseptate ascospores and conidia. An additional asexual morph was produced in culture and is described. Molecular studies of C. dabeicola and the new species confirmed a placement in Ostropales, although a relationship to Odontotremataceae was not supported. Both species were consistently in association with abnormal lenticular development on their woody hosts. It remains to be ascertained, however, if these are the causal agents of the bark disorders, or, simply, opportunistic colonisers. The finding of the second species in the genus Claviradulomyces on a plant from a distantly related family to that of the host of C. dabeicola (Erythroxylaceae) for the genus on a different continent suggests that fungi in this genus may be common on lenticels of other woody plants, and could even have a pantropical distribution. It is possible that fungi in the genus have remained unreported until now because lenticels have remained neglected as a habitat surveyed by mycologists.

No MeSH data available.


Related in: MedlinePlus