Planta

, Volume 224, Issue 3, pp 533–544

Molecular characterization of a seed transmitted clavicipitaceous fungus occurring on dicotyledoneous plants (Convolvulaceae)

  • Ulrike Steiner
  • Mahalia A. Ahimsa-Müller
  • Anne Markert
  • Sabine Kucht
  • Julia Groß
  • Nicole Kauf
  • Monika Kuzma
  • Monika Zych
  • Marc Lamshöft
  • Miroslawa Furmanowa
  • Volker Knoop
  • Christel Drewke
  • Eckhard Leistner
Original Article

DOI: 10.1007/s00425-006-0241-0

Cite this article as:
Steiner, U., Ahimsa-Müller, M.A., Markert, A. et al. Planta (2006) 224: 533. doi:10.1007/s00425-006-0241-0

Abstract

Ergoline alkaloids (syn. ergot alkaloids) are constituents of clavicipitaceous fungi (Ascomycota) and of one particular dicotyledonous plant family, the Convolvulaceae. While the biology of fungal ergoline alkaloids is rather well understood, the evolutionary and biosynthetic origin of ergoline alkaloids within the family Convolvulaceae is unknown. To investigate the possible origin of ergoline alkaloids from a plant-associated fungus, 12 endophytic fungi and one epibiotic fungus were isolated from an ergoline alkaloid-containing Convolvulaceae plant, Ipomoeaasarifolia Roem. & Schult. Phylogenetic trees constructed from 18S rDNA genes as well as internal transcribed spacer (ITS) revealed that the epibiotic fungus belongs to the family Clavicipitaceae (Ascomycota) whereas none of the endophytic fungi does. In vitro and in vivo cultivation on intact plants gave no evidence that the endophytic fungi are responsible for the accumulation of ergoline alkaloids in I. asarifolia whereas the epibiotic clavicipitaceous fungus very likely is equipped with the genetic material to synthesize these compounds. This fungus resisted in vitro and in vivo cultivation and is seed transmitted. Several observations strongly indicate that this plant-associated fungus and its hitherto unidentified relatives occurring on different Convolvulaceae plants are responsible for the isolated occurrence of ergoline alkaloids in Convolvulaceae. This is the first report of an ergot alkaloid producing clavicipitaceous fungus associated with a dicotyledonous plant.

Keywords

Ergoline alkaloidsIpomoeaTurbinaPlant–fungus associationSeed transmittanceClavicipitaceae

Abbreviations

ITS

Internal transcribed spacer

18S rDNA

Small subunit ribosomal DNA

SSCP

Single strand conformation polymorphism

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Ulrike Steiner
    • 2
  • Mahalia A. Ahimsa-Müller
    • 1
  • Anne Markert
    • 1
  • Sabine Kucht
    • 1
  • Julia Groß
    • 1
  • Nicole Kauf
    • 1
  • Monika Kuzma
    • 3
  • Monika Zych
    • 3
  • Marc Lamshöft
    • 1
  • Miroslawa Furmanowa
    • 3
  • Volker Knoop
    • 4
  • Christel Drewke
    • 1
  • Eckhard Leistner
    • 1
  1. 1.Institut für Pharmazeutische Biologie der Universität BonnBonnGermany
  2. 2.Institut für Pflanzenkrankheiten der Universität BonnBonnGermany
  3. 3.Department of Biology and Pharmaceutical BotanyThe Medical University of WarsawWarsawPoland
  4. 4.Institut für Zelluläre und Molekulare Botanik der Universität Bonn BonnGermany