Vol. 6, Issue 4 (2018)
Rapid multiplication in chrysanthemum (Dendranthema grandiflora Ramat.) using plant growth regulators
Author(s): SM Soundarya, M Jawaharlal, SP Thamaraiselvi and D Malarvizhi
Abstract: The present investigation was carried out to standardize the planting material, growing media and growth regulators for rapid multiplication in chrysanthemum. The study was conducted at the Botanic garden, Department of Floriculture and Landscaping, Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore during 2017-2018. The first experiment standardization of cuttings, media and growth regulators for induction of rooting in chrysanthemum consists three factors viz., two types of planting material (leaf bud cutting and single bud cutting), three types of media viz., enriched cocopeat, cocopeat + sand, and dam silt and 12 different concentrations of the growth regulators (IBA @ 50, 100, 200, 300ppm, NAA @ 50, 100, 200, 300 ppm, BA @ 25, 50 ppm, Coconut water and Keradix-F @ 20 ppm and control. The results revealed that leaf bud cutting was found to be the best planting material when compared to the single bud cutting. The best rooting media identified for rooting of cuttings was enriched cocopeat. The growth regulator effective for most of the parameters was coconut water followed by keradix-F and BA 25 ppm. Among the treatment combinations, leaf bud cuttings grown in enriched cocopeat + BA 25 ppm exhibited earlier rooting (5.50 days). Maximum root induction (17.00) was observed in two treatment combinations viz., leaf bud + enriched cocopeat + keradix-F 20 ppm and leaf bud + enriched cocopeat + coconut water. The highest survival percentage (90%) was recorded in leaf bud + enriched cocopeat + coconut water and recorded maximum leaf numbers in rooted cuttings (4.5 and 10.5) and highest shoot length (4.25 cm and 8.70 cm) after 25 and 45 days respectively. As the treatment leaf bud + enriched cocopeat + keradix-F had positive effect on root induction after 25 days, the length of roots (14.40 cm) and total height of rooted leaf bud cuttings (18.80 cm) were also significantly influenced by the same treatment. From the present study it is confirmed that leaf buds had highest regeneration ability and can be used for rapid multiplication of chrysanthemum, when treated with coconut water or keradix-F 20 ppm in enriched cocopeat media.
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How to cite this article:
SM Soundarya, M Jawaharlal, SP Thamaraiselvi, D Malarvizhi. Rapid multiplication in chrysanthemum (Dendranthema grandiflora Ramat.) using plant growth regulators. Int J Chem Stud 2018;6(4):2675-2683.
