Do growth regulators increase the seedling yield of polyembryonic ‘Zebda’ mango (Mangifera indicaL.) seeds?

This experiment was carried out during the 2012 and 2013 seasons on polyembryonic 'Zebda' mango seeds planted at the nursery of pomology department, Faculty of Agriculture, Cairo University, Egypt. This study aimed to investigate the effect of quick dipping in different plant growth regulators, namely, GA3, IBA (indole butyric acid) and BAP (benzyl amino burine) at 500, 1000, 2000 and 4000 ppm besides the control on seedling yield of mango seeds. The results indicated that GA3 at 500 and 4000 ppm as well as IBA at 500 ppm significantly increased the total seedling yield expressed as number of emerged seedling per seed and germination percent. Seedling length and vigor index were significantly increased by GA3 at 2000 and 4000 ppm compared to the control. Leaf number per seedling increased significantly by GA3 application at 2000 ppm. BAP treatments had a negative effect on most of the studied parameters.