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Specialised population of Claviceps purpurea from salt marsh Spartina species

Published online by Cambridge University Press:  22 May 2002

Sylvie PAŽOUTOVÁ ,
Alan F. RAYBOULD ,
Aleš HONZÁTKO  and
Rena´ta KOLÍNSKÁ
Sylvie PAŽOUTOVÁ
Affiliation:
Institute of Microbiology CAS, Vídeňská 1083, 142 20 Prague 4, Czech Republic.
Alan F. RAYBOULD
Affiliation:
Centre for Ecology and Hydrology, Winfrith Technology Centre, Dorchester, DT2 8ZD, UK.
Aleš HONZÁTKO
Affiliation:
Institute of Microbiology CAS, Vídeňská 1083, 142 20 Prague 4, Czech Republic.
Rena´ta KOLÍNSKÁ
Affiliation:
Institute of Microbiology CAS, Vídeňská 1083, 142 20 Prague 4, Czech Republic.
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Abstract

The Claviceps purpurea population colonising British Spartina salt marsh stands is characterised by unusually long cylindrical conidia (average 9·5–12 μm) and sclerotia floating on the water surface. RAPD, AFLP and rDNA comparison defined these isolates as the third genetically distinct homogenous population (G3) of C. purpurea. The same morphological and genetical markers were found also in S. alterniflora isolates from Spartina from the USA. All G3 isolates belonged to a chemotype producing ergocristine and ergocryptine. In phylogenetic trees based on rDNA and AFLP, a G1 population from fields and meadows appeared as the sister clade to the one formed by G3 (Spartina) and G2 (wet and shady habitats), both with floating sclerotia and elongated conidia. British stands of S. anglica were probably colonised by isolates introduced from America, rather than by isolates from species of neighbouring biotopes.

Type
Research Article
Information
Mycological Research , Volume 106 , Issue 2 , February 2002 , pp. 210 - 214
Copyright
© The British Mycological Society 2002

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