Author(s):

Minakshi Padhi, Anjana Sisodia, Sumit Pal, Mithilesh Kapri and Anil K Singh

Abstract: An experiment was carried out to find out effect of different growth regulators and different media on shoot and root growth in cormels of gladiolus cv. Tiger Flame in a Completely Randomized Design (CRD) with three replications in the Research Laboratory of Department of Horticulture, Institute of Agricultural Sciences, Banaras Hindu University, and Varanasi during November 2017. Treatment consisted of soil, sand and hydroponic media in combination with distilled water, GA3 (50 ppm) and thiourea (0.2%). Thus there were nine treatment combinations. A significant effect was observed on growth pattern due to use of various media and growth regulators for propagation of gladiolus cormels except length of sprout at 10, 15 days, leaf length at 30 days and width of leaf which possess non-significant effect with the use of various growth regulators. Pre-soaking treatment of cormels with GA3 (50 ppm) and thiourea (0.2%) for 24 hours was significantly more influencing over distilled water treatment in terms of growth, root and biomass characters of gladiolus cormels. From various growth regulators, thiourea (0.2%) retained maximum sprout length at 10 and 15 days after planting. No significant effect of growth regulators was observed on width of leaf. Use of hydroponic resulted maximum length of sprout at 10 and 15 days after planting and maximum leaf length at 20 days and maximum width of leaf which found statistically significant to sand and soil media. Thiourea (0.2%) resulted maximum number of roots and maximum fresh biomass of both shoots and roots, however GA3 (50 ppm) resulted maximum length of roots which found statistically significant to control (distilled water).

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