Effect of Plant Growth Regulators on Corm Production and Vase Life in Gladiolus

T. Padmalatha, G. Satyanarayana Reddy, R. Chandrasekhar

Abstract


Influence of plant growth regulator sprays on corm production and post-harvest life of two gladiolus cultivars, Darshan and Dhiraj, was investigated for two consecutive years, 2008-09 and 2009-10. Growth regulators, viz., gibberellic acid (100 and 150ppm), tri-iodo benzoic acid (TIBA) (50 and 100ppm), 2-chloro, 4-pyridyl phenyl urea (CPPU) (2.5 and 5ppm) and brassinosteroid (BR) (5 and 10ppm) were sprayed at the 3rd and 6th leaf stage. Cv. Darshan recorded maximum number of large cormels per plant and cormel weight, while, cv. Dhiraj recorded maximum number of small cormels per plant in treatments of pre-harvest foliar sprays with plant growth regulators. Foliar sprays of BR (10ppm) and GA3 (150ppm) significantly increased number of corms produced per plant, corm size, corm weight, and propagation coefficient. Number of large cormels and total number of cormels per plant were significantly higher in BR (10ppm), followed by TIBA (100ppm). BR (10ppm) and TIBA (100ppm) produced maximum number of small cormels per plant. Weight of cormels per plant was maximum in BR (10ppm) and GA3 (150ppm). Post-harvest studies revealed that cv. Darshan recorded maximum diameter of second fully-opened floret and higher vase-life than cv. Dhiraj with pre-harvest foliar spray of plant growth regulators. Pre-harvest foliar spray of GA3 (150ppm), BR (10ppm) and CPPU (5ppm) induced earliest first-floret opening and recorded maximum value for number-of-floretsopen- at-a-time per spike, diameter of second fully-opened floret, and vase-life. Foliar spray of BR (10ppm) and GA3 (150ppm) at 3rd and 6th leaf stage can be recommended for large-scale multiplication of quality planting material and longer vase-life of flower spikes, respectively, in gladiolus.

Keywords


Gladiolus, Corm, Vase-Life, GA3, Brassinosteroids, CPPU.

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References


Choudhury, M.L. and Prasad, K.V. 2004. Strategies for improving productivity, post harvest quality of floriculture crops. Souvenir, First Indian Horticulture Congress-2004, organized by Horticultural Society of India, New Delhi

Das, T.K. 1998. Corm and cormel production of gladiolus as affected by spike removal and K application. Indian J. Hort., 55:327-331

Devi, D.U., Sekhar, R.C. and Babu, J.D. 2007. Effect of growth regulators on flowering and corm production in gladiolus cv. Jacksonville Gold. J. Res., (ANGRAU), 35:6-14

Halevy, A.H. and Shild, R. 1970. Promotion of growth and flowering of plants with endogenous GA3 in gladiolus plants treated with CCC. Physiol. Plant., 23:820827

Hussain, S.C., Geetha, T.C.K., Rajeevan, P.K. and Valsala Kumari, C.K. 1997. Plant regeneration from root derived callus in gladiolus. J. Orn. Hort., 2:36-40

Kamble, B.S., Reddy, B.S., Patil, R.T. and Kulkarni, B.S. 2004. Performance of gladiolus cultivars on flowering and flower quality. J. Orn. Hort., 7:51-56

Kalasareddi, P.T., Reddy, B.S., Patil, P.R. and Kulkarni, B.S. 1997. Effect of time of planting on performance of two cultivars of gladiolus. II. Flowering, flower quality, vase and field life. Adv. Agril. Res. India, 8:45-51

Nagarjuna, B., Reddy, V.P., Rao, M.R. and Reddy, E.N. 1988. Effect of growth regulators and potassium nitrate on growth, flowering and yield of chrysanthemum. South Indian Hort., 36:136-140

Namita, Ramesh Kumar and Kushal Singh. 2006. Response of vase solution on keeping quality of cut spikes of gladiolus. J. Orn. Hort., 9:296-297

Nanjan, K. and Muthuswamy, S. 1975. Growth and flowering responses of Edward rose (Rosa bouboriana Desp.) to certain growth retardant sprays. South Indian Hort., 23:94-99

Nelofar and Paul, T.M. 2008. Post harvest management of gladiolus. J. Orn. Hort., 11:69-71

Nunez, M., Sosa, J.L., Alfonso, J.L. and Coll, F. 1998. Influence of two new Cuban bioregulators on plant yield of onion cv. Red Creole. Cultivos Tropicales, 19:21-24

Padmapriya, S. and Chezhiyan, N. 2002. Influence of gibberellic acid and certain other chemicals on flowering characters of chrysanthemum (Dendranthema grandiflora Tzeled.) cultivars. South Indian Hort., 50:437-443

Pal, P. and Choudhury, T. 1998. Effect of growth regulators and duration of soaking on sprouting growth, flowering and corm yield of gladiolus cv. Tropic Sea. Hort. J., 11:69-77

Raju, D.V.S., Misra, R.L. and Singh, V.P. 2008. Effect of pre-harvest spray of thiol compounds on post-harvest life of gladiolus spikes. J. Orn. Hort., 11:75-76

Ramraj, V.M., Vyas, B.N., Godrej, N.B., Mistry, K.B., Swami, B.N. and Singh, N. 1997. Effects of 28homobrassinolide on yields of wheat, rice, groundnut, mustard, potato and cotton. J. Agril. Sci., 128:405413

Ranvir Singh and Sashikala, B. 2002. Post-harvest life of gladiolus as influenced by floral preservatives. J. Orn. Hort., 8:115-118

Seenivasan, N. 2001. Effect of plant growth regulators on dormancy and growth of gladiolus. M.Sc. (Hort.) Thesis, Acharya N.G. Ranga Agricultural University, Hyderabad, A.P., India

Tawar, R.V., Sable, A.S., Kakad, G.J., Hage N.D. and Ingle, M.B. 2007. Effect of growth regulators on corms and cormels production of gladiolus cv. Jester. Ann. Pl. Physiol., 21:257-258

Umadevi, D. 2002. Effect of growth regulators application at three stages of crop growth on production of flowers, propagules and vase life of cut spikes in three cultivars of gladiolus (Gladiolus grandiflorus L.). M.Sc. (Hort.) Thesis, Acharya N.G. Ranga Agricultural University, Hyderabad, A.P., India

Vijai Kumar and Umrao, V. 2007. Effect of gibberellic acid on gladiolus. South Indian Hort., 55:303-305

Zieslin, N., Brian, I. and Halevy, A.H. 1974. The effect of growth regulators on growth and pigmentation of ‘Baccara’ rose flowers. Pl. Cell Physiol., 15:341349




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