ISSN:
1615-6110
Keywords:
Ascomycetes
;
Clavicipitaceae
;
Balansieae
;
Epichloë typhina
;
Acremonium spp
;
Grass endophytes
;
coevolution
;
ribosomal RNA gene
;
DNA sequence polymorphism
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Acremonium sect.Albo-lanosa (Fungi Imperfecti) includes beneficial, endophytic mycosymbionts of various grasses of the subfamilyPooideae, 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 ofE. typhina and anamorphs were obtained from eight grass species, sequences of their rRNA gene internal transcribed spacers were aligned with those from otherClavicipitaceae, 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 fromE. typhina on multiple occasions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00937980
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