Molecular phylogenetic relationships of nonpathogenic grass mycosymbionts and clavicipitaceous plant pathogens

Christopher L. Schardl, Jih Shiou Liu, James F. White, Raphael A. Finkel, Zhiqiang An, Malcolm R. Siegel

Research output: Contribution to journalArticlepeer-review

91 Scopus citations

Abstract

Acremonium sect. Albo-lanosa (Fungi Imperfecti) includes beneficial, endophytic mycosymbionts of various grasses of the subfamily Pooideae, and also the anamorph of the grass choke pathogen, Epichloë typhina (Clavicipitaceae, Ascomycotina). These fungi are seed-disseminated, thus stably maintained for many host generations. To investigate the possibility of long-term coevolution, isolates of E. typhina and anamorphs were obtained from eight grass species, sequences of their rRNA gene internal transcribed spacers were aligned with those from other Clavicipitaceae, and cladograms were generated by maximum parsimony. The results indicated that the nonpathogenic endophytes have not necessarily coevolved with their host species and that they arose from E. typhina on multiple occasions.

Original languageEnglish (US)
Pages (from-to)27-41
Number of pages15
JournalPlant Systematics and Evolution
Volume178
Issue number1-2
DOIs
StatePublished - Mar 1991
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

Keywords

  • Acremonium spp
  • Ascomycetes
  • Balansieae
  • Clavicipitaceae
  • DNA sequence polymorphism
  • Epichloë typhina
  • Grass endophytes
  • coevolution
  • ribosomal RNA gene

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