Two Phytotoxins Isolated from the Pathogenic Fungus of the Invasive Weed Xanthium italicum.
Chem Biodivers
; 17(4): e2000043, 2020 Apr.
Article
en En
| MEDLINE
| ID: mdl-32112467
ABSTRACT
Alternariol and altenuisol were isolated as the major phytotoxins produced by an Alternaria sp. pathogenic fungus of the invasive weed Xanthium italicum. Altenuisol exhibited stronger phytotoxic effect compared with alternariol. At 10â
µg/mL, alternariol and altenuisol promoted root growth of the monocot plant Pennisetum alopecuroides by 11.1 % and 75.2 %, respectively, however, inhibitory activity was triggered by the increase of concentration, with root elongation being suppressed by 35.5 % and 52.0 % with alternariol and altenuisol at 1000â
µg/mL, respectively. Alternariol slightly inhibited root length of the dicot plant Medicago sativa at 10-1000â
µg/mL, whereas altenuisol stimulated root growth by 51.0 % at 10â
µg/mL and inhibited root length by 43.4 % at 200â
µg/mL. Alternariol and altenuisol did not exert strong regulatory activity on another dicot plant, Amaranthus retroflexus, when tested concentration was low, however, when the concentration reached 1000â
µg/mL, they reduced root length by 68.1 % and 51.0 %, respectively. Alternariol and altenuisol exerted similar effect on shoot growth of three tested plants but to a lesser extent. It is noteworthy to mention that this is the first report on the phytotoxicity of altenuisol.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Xanthium
/
Alternaria
/
Micotoxinas
Idioma:
En
Revista:
Chem Biodivers
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2020
Tipo del documento:
Article