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Endophytic fungi from plants living on gypsum soils as a source of secondary metabolites with antimicrobial activity

Published online by Cambridge University Press:  01 June 1998

F. PELÁEZ
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
J. COLLADO
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
F. ARENAL
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
A. BASILIO
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
A. CABELLO
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
M. T. DÍEZ MATAS
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
J. B. GARCÍA
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
A. GONZÁLEZ DEL VAL
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
V. GONZÁLEZ
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
J. GORROCHATEGUI
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
P. HERNÁNDEZ
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
I. MARTÍN
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
G. PLATAS
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
F. VICENTE
Affiliation:
Centro de Investigación Básica. Merck, Sharp & Dohme de España SA. Josefa Valcárcel 38, E-28027 Madrid, Spain
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Abstract

Endophytic fungi were isolated from nine plant species growing on gypsum and saline soils in central Spain. The plants sampled were Arundo donax, Atriplex halimus, Diplotaxis erucoides, Ephedra nebrodensis, Phragmites australis, Rosmarinus officinalis, Scirpus holoschoenus, S. maritimus and Stipa tenacissima. A total of 152 fungal species were recovered from 2880 samples of leaves, stems or twigs, taken from 45 individual plants. Ephedra and Rosmarinus showed the highest diversity of endophytes, whereas both species of Scirpus showed the lowest. The most frequently isolated fungi were Alternaria alternata, Sporormiella intermedia, Rhizoctonia sp., Epicoccum purpurascens, Pleospora herbarum, Cladosporium herbarum, Sporormiella australis and a sterile fungus. A total of 187 strains belonging to 136 species were tested for the production of antimicrobial activities, using a panel of bacteria and yeasts, some of them of clinical relevance. Production of antimicrobial compounds was detected in 45 strains, belonging to 37 species. Large differences were observed among isolates from the same species, with respect to their ability to produce metabolites with antimicrobial activity.

Type
Research Article
Copyright
© The British Mycological Society 1998

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