Influence of Growth Regulators on Germination of Jackfruit (Artocarpus heterophyllus Lam.) Seed

The experiment was carried out during the year 2013 at Regional Horticultural Research Station, ASPEE College of Horticulture & Forestry, Navsari Agricultural University, Navsari. The experiment was laid out in Completely Randomized Design with Factorial concept having fourteen treatment combinations, comprising of two levels of soaking hour viz., 12 and 24 hour and six levels of growth regulators viz., NAA10, 25 and 50 mg l⁻¹, GA₃ 50, 100 and 250 mg l⁻¹ and Distilled water. The results revealed that among the different soaking hour and growth regulators, 12 hour and GA₃100 mg l⁻¹ were individually found to be most beneficial for minimized days for germination and improving germination percentage. Similar trend was observed on growth parameters such as height of plant, girth of plant, number of leaves, leaf area, length of longest shoot, number of internodes, fresh weight and dry weight of plant, length of longest root, girth of longest root and survival percentage. The interaction between soaking hour and growth regulators for all parameters were found non significant.