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Monosporascus ibericus sp. nov., an endophytic ascomycete from plants on saline soils, with observations on the position of the genus based on sequence analysis of the 18S rDNA

Published online by Cambridge University Press:  26 February 2002

Javier COLLADO ,
Antonio GONZÁLEZ ,
Gonzalo PLATAS ,
Alberto M. STCHIGEL ,
Josep GUARRO  and
Fernando PELÁEZ
Javier COLLADO
Affiliation:
Centro de Investigación Básica (CIBE) – Natural Products Drug Discovery, Merck Research Laboratories, Merck, Sharp and Dohme de España, C/Josefa Valcárcel 38, E-28027 Madrid, Spain.
Antonio GONZÁLEZ
Affiliation:
Centro de Investigación Básica (CIBE) – Natural Products Drug Discovery, Merck Research Laboratories, Merck, Sharp and Dohme de España, C/Josefa Valcárcel 38, E-28027 Madrid, Spain.
Gonzalo PLATAS
Affiliation:
Centro de Investigación Básica (CIBE) – Natural Products Drug Discovery, Merck Research Laboratories, Merck, Sharp and Dohme de España, C/Josefa Valcárcel 38, E-28027 Madrid, Spain.
Alberto M. STCHIGEL
Affiliation:
Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, C/Sant Llorenç 21, E-43201 Reus, Spain.
Josep GUARRO
Affiliation:
Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, C/Sant Llorenç 21, E-43201 Reus, Spain.
Fernando PELÁEZ
Affiliation:
Centro de Investigación Básica (CIBE) – Natural Products Drug Discovery, Merck Research Laboratories, Merck, Sharp and Dohme de España, C/Josefa Valcárcel 38, E-28027 Madrid, Spain.
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Abstract

A new pyrenomycete, Monosporascus ibericus sp. nov., isolated as an endophyte from roots and stems of three plant species growing on sand flats and salt marshes in the Ebro Delta (Spain), is described. The main characteristic of this fungus is the presence of a higher number of ascospores per ascus (up to six), compared to the other species of the genus: M. cannonballus, M. eutypoides, and M. monosporus. M. ibericus produces a cleistothecial ascomata with a tomentose peridium and lacks an anamorph. In addition to the morphological data, the comparative analysis of the ITS-region sequences of M. ibericus and the other Monosporascus spp., has supported the recognition of the new species. A phylogenetic study based on the sequences of the 18S rDNA did not allow us to assess clearly the taxonomic position of the genus Monosporascus, although the results indicated the genus might have affinities to the Xylariales rather than to the Sordariales.

Type
Research Article
Information
Mycological Research , Volume 106 , Issue 1 , January 2002 , pp. 118 - 127
Copyright
© The British Mycological Society 2002

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