Fusarium oxysporum f. sp. albedinis: EFFETS DU MILIEU DE CULTURE SUR LA CROISSANCE MYCELIENNE, LA SPORULATION ET LA PRODUCTION DE L’ACIDE FUSARIQUE

MECHTA Narimane; AZOUAOUI-AIT KETTOUT Tassadi; RAHMANIA Fatma

MECHTA Narimane Laboratoire de Recherche sur les Zones Arides, Faculté des Sciences Biologiques Université de Sciences et de la Technologie Houari Boumediene (USTHB), Alger, Algérie
AZOUAOUI-AIT KETTOUT Tassadi Laboratoire de Recherche sur les Zones Arides, Faculté des Sciences Biologiques Université de Sciences et de la Technologie Houari Boumediene (USTHB), Alger, Algérie
RAHMANIA Fatma Laboratoire de Recherche sur les Zones Arides, Faculté des Sciences Biologiques Université de Sciences et de la Technologie Houari Boumediene (USTHB), Alger, Algérie

Keywords: Fusarium oxysporum f, sp. albedinis, milieu de culture, croissance mycélienne, sporulation, acide fusarique

Abstract

- Bayoud disease or fusariose of date palm (Phoenix dactylifera. L), is caused by the soil fungi Fusarium oxysporum f. sp. albedinis (Killian and Maire) Gordon (F.o.a.). Fusaric acid (FA) produced by F.o.a. have been proposed to play an important role during the pathogenic process. So, the objective of the present work is to study the effects of culture media, on the mycelial growth, sporulation and fusaric acid production by this pathogen. Four culture media, namely: Potato Dextrose Agar (PDA), Czapeck-Dox Agar (CDA), Czapeck-Glucose Agar (CGA) and Richard’s Agar (RA) were evaluated. The results obtained show that F.o.a. grows better on CGA. Sporulation is more important on PDL medium, and thus, throughout the experimentation (28 days). A Fusaric acid level produced by F.o.a. is substantially identical 10 days after its development in media tested. However at the 20th day of the F.o.a. development, the CGL medium is more favorable to the production of FA, whereas PDL stimulates the production of this toxin from the 30th day.