THE EFFECT OF ADDITION OF AUXIN GROWTH REGULATOR (IBA) AND GIBERELIN (GA3) AGAINST FLOWERING PROCESS OF RED ONION IN TSS PRODUCTION (TRUE SHALLOT SEED)

• Main Author: FADILLAH AL HAQ (NIM : 11413020), NISA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23509
• Institution: Institut Teknologi Bandung

True Shallot Seed (TSS) is a seed produced from the flower of shallot plant used as planting material. TSS has several advantages that is not carrying infectious diseases so that the productivity of the plant increases, there is no dormancy and has a longer shelf life of 2 years. The onion plant used is Allium ascalonicum var. Lokananta. The purpose of this research is to know the response of shallot plant on flowering process (generative phase) due to the administration of growth regulator auksin (IBA) and gibberellin (GA3), want to know the interaction between growth regulator auksin (IBA) and gibberellin (GA3) in flowering process (generative phase) and want to know the concentration of growth regulator of auxin (IBA) and gibberellin (GA3) that can increase the onion flowering process optimally. This research used Randomized Block Design (RAK) of 4x5 factorial pattern with first factor of ZPT IBA (I) concentration consists of 4 levels ie i0 = without IBA, i1 = IBA concentration 50 ppm, i2 = IBA concentration 100 ppm, i3 = IBA concentration 150 ppm and second factor was ZPT GA3 (G) consists of 5 levels ie g0 = without GA3, g1 = GA3 concentration of 100 ppm, g2 = GA3 concentration of 200 ppm, g3 = GA3 concentration of 300 ppm, and g4 = GA3 concentration of 400 ppm repeated 3 times. Parameters tested in this study were the number of umbel per plant, the diameter of the umbel, the number of flowers per umbel and the percentage of the pithy capsule. The results of this study resulted in the conclusion that the growth of growth regulator auksin (IBA) and giberelin (GA3) did not give a real effect on flowering process (generative phase) of onion plants; There is no interaction between growth regulator of auxin (IBA) and gibberellin (GA3) in the flowering process (generative phase); On the variable number of umbel concentration auksin and giberelin which tends to give higher effect is auksin 50 ppm that is 3 umbel, and giberelin 200 ppm that is 2,97 umbel. In variable diameter umbel concentration auksin and giberelin which tend to give higher effect is auksin 150 ppm that is 3,35 cm (week 8); 4.84 cm (week 10); 4.55 cm (week 12) and 3.83 cm (week 14) and 100 ppm giberelin concentration of 3.30 cm (week 8); 4.99 cm (week 10); 4.62 cm (week 12) and 4.40 cm (week 14). On the variable total number of flowers perumbel concentration auksin and giberelin which tend to give higher effect is auksin 50 ppm that is 159,6 flower per umbel and giberelin 400 ppm is 155,25 flower per umbel. In the variable percentage of concentrated interest rate auksin and gibberellin concentration which tends to give a higher effect is auksin 150 ppm is 35.64%. And giberelin 300 ppm is 39.11%.