Plant Growth Regulators Impact on Vegetative and Reproductive Characteristics of Gladiolus Cut Flowers (Gladiolus hybridus Hort)

Document Type: Original Article


1 Persian Gulf University, Faculty of Agriculture and Natural Resources, Department of Horticultural Science, Bushehr, Iran

2 Ferdowsi University of Mashhad, Faculty of Agriculture, Department of Horticultural Science, Mashhad, Iran


Gladiolus is an important marketable cut flower, especially valued for use in floral arrangements. We assessed the effects of two different methods of application (foliar spray and drench) and various concentrations of gibberellic acid (GA3), salicylic acid (SA), mival (MI) and krizatcin (KR) on vegetative and reproductive features of Gladiolus hybridus. The experiment was planned in a factorial experiment based on a completely randomized design with four replicaties. The results showed that plant growth regulators (PGRs) had significant effect on florets number, leaf area and corm weight and volume. The best treatment to increase the floral stalk length was 50 mg L-1 GA3 spray. Our results indicated that higher GA3 doses significantly increased leaf area more than lower doses. Furthermore, maximum floret diameter was achieved at 100 mg L-1 MI applied as foliar spray. The maximum number of florets (15.87) was obtained in the plants treated with intermediate concentrations of MI in both application methods. Corms drenched with 25 mg L-1 MI effectively increased their corm weight and volume. Generally, MI was found to be more effective than other PGRs. Therefore, due to greater efficacy of mival, it is suggested to use this PGR in order to increase the growth of vegetative organs as well as reproductive attributes.


Al-khassawneh, N.M., Karam, N.S. and Shibli, R.A. 2006. Growth and flowering of black iris (Iris nigricans Dinsm.) flowering treatment with plant growth regulators. Scientia Horticulturae. 107:187-193.

Barzegar, T., Khalighi, A. and Naderi, R. 2004. Effect of nitrogen rate and planting time on vegetative traits and corm yield of gladiolous (Gladiolus grandiflora L. cv. Oscar). Seed and Plant Improvment Journal. 22 (1): 55-65.

Bhattacharjee, S.K. 1984. The effect of growth regulating chemicals on gladiolous. Gartenbauwiasenschaft. 49: 103-106.

Eid, R.A. and Abou-Leila, B.H. 2006. Response of croton plants to gibberellic acid, benzyl adenine and ascorbic acid application. World Journal of Agricultural Sciences. 2:174-179.

El-Tayeb, M.A. 2005. Response of barley grains to the interactive effect of salinity and salicylic acid. Plant Growth Regulation. 45:215–224.

Emongor, V. E. 2004. Effect of gibberellic acid on post-harvest quality and vase life of gerbera cut flowers. Journal of Agronomy, 3: 191-195.

Gul, H., Khattak, A.M. and Amin, N. 2006. Accelerating the growth of araucaria heterophylla seedlings through different gibberellic acid concentrations and nitrogen levels. Journal of Agricultural and Biological Science.1(2): 25-29.

Hartmann, H.T., Kester, D.E. and Davies, F.T. 1990. Plant propagation, principles and practices. 5th ed. Prentice-Hall, Englewood Cliffs, NJ.

 Hassanpour Asil, M., Roein, Z. and Abbasi, J. 2011. Response of tuberose (Polianthes tuberose L.) to gibberellic acid and benzyladenine. Horticulture, Environment and Biotechnology, 52(1):46-51.

Hashemabadi, D. and Zarchini, M. 2010 .Yield and quality management of rose (Rosa hybrida cv. Poison) with plant growth regulators. Plant Omics Journal. 3(6):167-171.

Hayat, S. and Ahmad, A. 2007. Salicylic acid - A Plant Hormone. Springer. 401 p.

Ji-gang, B., Pei-lei, X., Cheng-shun, Z. and Cai-yun, W. 2009. Effects of exogenous calcium on some postharvest characteristics of cut gladiolus. Agricultural Sciences in China. 8 (3): 293-303.

Kazimirovskaya, V.B., D'yakov, V.M. and Voronkov, M.G. 2001. 1-(Chloromethyl) silatrane: a regulator of the functional activity of connective tissues. Pharmaceutical Chemistry Journal. 35 (9): 465-467.

Muchopadhyay, A. and Banker, G.J. 1983. Regulation of growth and flowering in Polianthes tuberosa L. with gibberellic acid on ethrel spray. Horticulture Science.19: 149-152.

Popova, L., Pancheva, T. and Uzunova, A. 1997. Salicylic acid: properties, biosynthesis and physiological role. Bulgarian Journal of Plant Physiology. 23: 85–93.

Ram, R., Mukherjee, D. and Manuja, S.2002. Plant growth regulators affect the development of both corms and cormels in gladiolus. Hort Science, 37: 343-344.


Roychowdhury, N. 1989. Effect of plant spacing and growth regulators on growth and flower yield of gladiolus grown under polythene tunnel. Acta Horticulturae, 246: 259-263.

Singh, K.P. 1997. Improved agro-techniques for gladiolus. A review of work done in India. Agricultural Reviews. 18:212–238.

Thomas, S.G., Rieu, I. and Steber, C.M. 2005. Gibberellin metabolism and signaling. Vitamins and Hormones. 72:289–338.

Voronkov, M. G. and Baryshok, V. P. 2010. Atranes as a new generation of biologically active substances. Herald of the Russian Academy of Sciences. 80(6): 514-521.

Voronkov, M. G., Dolmaa G., Tserenpil, Sh., Ugtakhbayar, O. and Chimidtsogzol, A. 2005. Stimulation of barley seed germination by micromolar aqueous solutions of silatrane and cresacin. Doklady Biological Sciences .404 (4): 562.

Voronkov, M. G., Platonova, R. N., Svarinskaia, R., Karpova, N. I. and Diakov, V. 1978. Cytophysiological analysis of action of 1-(chloromethyl)-silatrane on meristem cells of higher-plants. Doklady Akademii Nauk SSSR, 242(6):1407-1410.