Mango malformation: I. Toxin production associated with fusarium pathogens.
Haggag M. W., Hazza M., Sehab A., El-Wahab M. A.
Author Affiliation: Department of Plant Pathology National Research Center, Dokki, Cairo, Egypt.
American Journal of Plant Sciences 2 : 276-281
Abstract : Eight Fusarium species i.e. F. subglutinans, F. solani, F. oxyspoum, F. sterilihyphosum, F. proliferatum, F. moniliforme, F. avena and F. chlamydspore isolated from mango malformed disease were tested for their ability to cause mango malformation disease and their production of moniliformin and total fumonisins (FB1+FB2) using HPLC. A evaluated for moniliformin production, seven isolates were toxin producers, the production levels ranging from 0.51 to 8.90 µg/ml. The higher levels were produced by Fusarium subglutinans (8.51 µg/ml). Moderate concentrations of moniliformin was produced by F. moniliforme (6.90 µg/ml), F. oxysporum (6.30 µg/ml), F. proliferatum (4.10 µg/ml) and F. sterilihyphosum (1.10 µg/ml). Separation and identification of Fumonisin that was isolated from the pathogen-causing disease are made by (HPLC). A evaluated for total fumonisin production (FB1+FB2), seven isolates were toxin producers, the production levels ranging from 0.10 to 8.30 µg/ml. The higher levels were produced by F. moniliforme (8.30 µg/ml). Moderate concentrations of fumonisin was produced by F. proliferatum (0.64 µg/ml) and F. subglutinans (0.50 µg/ml). Strong positive correlations between moniliformin and total fumonisins (FB1+FB2) activities and malformation disease incidence by F. subglutinans, F. solani, F. oxyspoum, F. sterilihyphosum, F. proliferatum was observed.