Alk(en)ylresorcinol concentrations in 'Kensington Pride' mango peel and antifungal activity against Colletotrichum gloeosporioides.
Zainuri, Irving D. E., Dann E. K., Coates L. M., Wearing A. H.
Author Affiliation: Department of Agricultural Technology, Faculty of Agriculture, University of Mataram, Mataram 83115, Lombok, NTB, Indonesia.
: 217-222
Abstract : Two preformed alk(en)ylresorcinols, 5-n-heptadecenylresorcinol and 5-n-pentadecylresorcinol, were identified in 'Kensington Pride' mango fruit peel. The alk(en)ylresorcinols had antifungal activity against C. gloeosporioides, as determined from thin layer chromatography bioassays. Soil-applied activators of plant defence (Acibenzolar at 150 mg L-1, and soluble potassium silicate at 200 and 1000 mg L-1) did not influence concentrations of 5-n-heptadecenylresorcinol or 5-n-pentadecyl-resorcinol in mango peel when applied 2 months after fruit set and one month later. Concentrations of both alk(en)ylresorcinols were high 2 months after fruit set but levels declined by 50% within 1 month (2 months before commercial harvest) and did not change significantly from commercial harvest until eating-ripe.