Effect of polyamines on pollen germination, fruit set and retention of mango cv. Ewais.
Khattab M. M., Shaban A. E. A.
Author Affiliation: Pomology Department, Faculty of Agriculture, Cairo University, Cairo, Egypt.
Bulletin of Faculty of Agriculture, Cairo University 56 : 361-372
Abstract : Aqueous solutions of spermidine, spermine or putrescine, each at three concentrations (10-3, 10-4 and 10-5), were sprayed at full flowering onto panicles of mango cv. Ewais to study their effects on fruit set, retention and fruit characteristics at harvest during 2001-02 in Giza Governorate, Egypt. The effect of the polyamines on pollen grain germination in vitro was also tested. All the polyamines increased pollen germination percentage, fruit set, retention, fruit acidity and total soluble solids (TSS), meanwhile they decreased fruit weight and TSS/acid ratio. Spermidine was more effective than spermine or putrescine in this regard. A positive relationship was found between polyamine concentration and pollen germination, fruit set, retention, fruit acidity and TSS, while fruit weight decreased with increasing polyamine concentration.