Clustering of trichothecene-producing Fusarium strains determined from 28S ribosomal DNA sequences.
Appl Environ Microbiol
; 63(5): 1843-6, 1997 May.
Article
en En
| MEDLINE
| ID: mdl-9143116
ABSTRACT
The genus Fusarium includes several species that produce trichothecenes. We analyzed DNA sequences from a variable region at the 5' end of the large nuclear ribosomal DNA (rDNA) (28S) to determine the genetic relatedness of trichothecene-producing Fusarium species. All trichothecene-producing strains clustered together, and two monophyletic groups were resolved. The first clade included strains of F. acuminatum, F. sambucinum, F. tumidum, F. compactum, F. camptoceras (red pigment), F. sporotrichioides, and F. venenatum, which produced type A trichothecenes (T-2 toxin, HT-2 toxin, neosolaniol, and diacetoxyscirpenol). The second clade consisted of strains of F. crookwellense, F. culmorum, and F. graminearum, which produced type B trichothecenes (fusarenone-X, nivalenol, and deoxynivalenol). The phylogenetic placement of the species based on rDNA correlated better with toxic secondary metabolite data rather than with the current classification system based on morphology.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
ADN de Hongos
/
ARN Ribosómico 28S
/
Fusarium
Idioma:
En
Revista:
Appl Environ Microbiol
Año:
1997
Tipo del documento:
Article
País de afiliación:
Italia