Mango malformation: II. Mangiferin changes associated with fusarium pathogens.
Haggag W. M., Hazza M., El-Wahab M. E. A.
Author Affiliation: Department of Plant Pathology, National Research Center, Dokki, Cairo, Egypt.
Agricultural Sciences 2 : 291-296
Abstract : Mangiferin (1,3,6,7-tetrahydroxy xanthone-C2-b-D-glucoside) promoted vegetative growth and exhibited inhibitory role on the occurrence of malformation. Mangiferin changes associated with mango malformation pathogens were followed after inoculated mango seedlings (three years) with malformation pathogens i.e. Fusa-rium subglutinans, F. sterilihyphosum, F. oxysporum and F. proliferatum. Mangiferin remained at lower level in leaves of malformed shoots as compared to healthy one. The floral malformation was observed to be associated with the reduction of mangiferin. Strong positive correlations between mangiferin activity and malformation incidence were observed. Mangiferin level at panicle initiation may give a possible estimate of malformation incidence in mango.