Effect of Paclobutrazol on Adventitious Root Formation of IBA-Treated Cuttings of ‘Zard’ and ‘Dakal’ Olive (Olea europaea L.) Cultivars

Hedayatullah Salari, Bahram Baninasab, Matiullah Akbari, M. Afzal Rohani


Olive cuttings are difficult to propagate. They root well using synthetic auxin, indole-3-butyric acid (IBA). To evaluate the rooting and viability of olive semi-hardwood cuttings of ‘Dakal’ and ‘Zard’ cultivars in response to application of growth retardant, paclobutrazol (PBZ), and interaction of IBA and PBZ, a greenhouse experiment was conducted in 2012.  Cuttings were dipped for 30 minutes in PBZ (0, 1000, 2000, and 4000 mg.L-1) and for 50 seconds inIBA (2000 mg.L-1) solutions, respectively and then planted in a sandy bed of propagation under automatic mist system with 95% humidity and 20±5 oC base temperature. Results showed that cutting viability, percentages of rooted, callused and rooted plus callused cuttings and root growth parameters were higher in ‘Dakal’ cultivar than ‘Zard’ cultivar.  The 2000 mg.L-1 PBZ  treated cuttings had a higher cutting viability, rooting percentage, number of branches per cutting, shoot length, number of roots per cutting, root length and root fresh and dry weights than the control. It appears that the rooting of ‘Dakal’ cultivar can be substantially improved by the treatment of PBZ (included IBA).


olive, auxin, paclobutrazol, semi-hardwood cuttings

Full Text:



• Abdi, G., Ascari-Raburi, N., “Enhancement of IBA, Urea-Phosphate, paclobutrzol and their combinations on rooting of Royal Poinciana (Delonix regia) stem cuttings”, Amer.-Eur. J. Agric. Envir. Sci., Vol. 6, pp. 132-136, 2009.

• Arteca, R., Plant Growth Substances: Principles and Applications. New York: Chapman and Hall, USA, 1996.

• Ayaz, M., Hussain, S.A., Ali, N., “Effect of Paclobutrazol concentrations and dipping period on rooting of soft wood cuttings of guava (Psidium guajava)”, Pakistan J. Biol. Sci., Vol. 7, pp. 28-31, 2004.

• Baninasab, B., Ghobadi, C., “Influence of paclobutrazol and application methods on high-temperature stress injury in cucumber seedlings”, J. Plant Growth Regul, Vol. 30, pp. 213-219, 2011.

• Barranco, D., Ercan, H., Munoz-Diez, C., Belja, A., Arquero, O., “Factors influencing the efficiency of foliar sprays of monopotassium phosphate in the olive”, Int. J. Plant Prod, Vol. 4, pp. 235-240, 2010.

• Basra, A.S., Plant Growth Regulators in Agriculture and Horticulture: Their Role and Commercial Uses. Haworth Press. Inc. Binghamton, 2000.

• Bora, K.K., Munot, J., Mathur, S., “Metabolic changes associated with paclobutrazol induced rootings in hypocotyls cuttings of mung bean”, Bot. Bul., Acad. Sin, Vol. 32, pp. 9-14, 1991.

• Botelho, R.V., Maia, A.J., Pires, E.J.P., Terra, M.M., Schuck, E., “Effect of Plant regulators on the vegetative propagation of vine rootstock '43-43' (Vitis vinifera x V. rotundifolia)”, Rev. Bras. Frutic, Jaboticabal-SP, Vol. 27, pp. 6-8, 2005.

• Davis, T.D., Haissig, N., Shankhla, N., “Adventitious Root Formation in Cuttings”, Advances in Plant Sciences Series Vol. .Dioscorides Press, Portland, OR, 1988.

• Davies, P.J., Plant Hormones, Biosynthesis, Signal Transduction, Action. Kluwer Academic Publishers. Dordrecht, The Netherlands, 2004.

• Eliasson, L., “Factors affecting the inhibitory effects of indolylacetic acid on root formation in pea cuttings”, Physiol. Plant, Vol. 51, pp. 23-26, 1981.

• Fabbri, A., Bartolini, G., Lambardi, M., Kailis, S., Olive Propagation Manual. CSIRO, Australia, 2004.

• Fuller, K.P., Zajicek, J., “Water relations and growth of Vinca following chemical growth regulation”, J. Envir. Hort., Vol. 13, pp. 19-21, 1995.

• Geneva, R.L., “Root formation in cuttings of English ivy treated with paclobutrazol or uniconazole”, Hort. Sci., Vol. 25, pp. 709, 1990.

• Gerakakis, A.C., Ozkaya, M.T., “Effects of cutting size, rooting media and planting time on rooting of 'Domat' and 'Ayvalik' olive (Olea europaea L.) cultivars in shaded polyethylene tunnel”, Tarim Bilimleri Dergisi, Vol. 11, pp. 334-338, 2005.

• Hafeez, U.R., Khan, M.A., Khokhar, K.M., Laghari, M.H., Rahman, H., “Effect of season on rooting ability of tip cuttings of guava (Psidium guajava) treated with paclobutrazol”, Indian J. Agric. Sci., Vol. 61, pp. 404-406, 1991.

• Hartmann, H.T., Kester, D.E., Davies, F.T. Jr., Geneve, R.L., Plant Propagation: Principles and Practices. Prentice-Hall, Englewood Cliffs, NJ, USA, 2011.

• Henrique, A., Campinhos, E.N., Ono, E.O., Pinho, Z.D., “Effect of plant growth regulators in the rooting of Pinus cuttings”, Braz. Arch. Biol. and Technol., Vol. 49, pp. 189-196, 2006.

• Marshall, K.F., Waring, G., “Effect of roots on survival percentage and shoot development in cuttings”, Plant Cell Physiol. Cult., Vol. 16, pp. 563-569, 1985.

• Martinez, B.S., Fernandez, J.A., Ochoa, J., Gonzalez, A., “Effect of indolebutyric acid and paclobutrazol on the rooting of Rhamnus alaternus stem cuttings”, Acta Hort. (ISHS), Vol. 614, pp. 263-267, 2003.

• Medina, R., Burgos, A., Difranco, V., Mroginski, L., Cenoz, P., “Effects of chlorocholine chloride and paclobutrazol on cassava (Manihot esculenta Crantz cv. Rocha) plant growth and tuberous root quality”, Agriscientia, Vol. 24, pp. 51-58, 2012.

• Mukhtar, A., Iftikhar, A., Laghari, M.H., H., “Effect of growth regulators on rooting in softwood cuttings of guava under mist condition”, Sarhad J. Agric. Res., Vol. 14, pp. 423-425, 1998.

• Pan, R., Tian, X., “Comparative effect of IBA, BSAA and 5,6-Cl2-IAA-Me on the rooting of hypocotyls in mung bean”, Plant Growth Regul., Vol. 27, pp. 91-98, 1999.

• Pan, R., Zhao, Z., “Synergistic effects of plant growth retardants and IBA on the formation of adventitious roots in hypocotyls cuttings of mung bean”, Plant Growth Regul., Vol. 14, pp. 15-19, 1994.

• Pijut, P.M., Woeste, K.E., Michler, C.H., “Promotion of adventitious root formation of difficult-to-root hardwood tree species”, In: Janick, J. Horticultural Review, Vol. 38. Wiley-Blackwell, USA, 2011.

• Piotto, B., Noi, A.D., Seed Propagation of Mediterranean Trees and Shrubs. Agency for the Protection of the Environment and for Technical Services (APAT). Rome – Italy, 2001.

• Podwyszynska, M., Marasek, A., “Effects of thidiazuron and paclobutrazol on regeneration potential of tulip flower stalk explants in vitro and subsequent shoot multiplication”, Acta Soc. Bot. Polon., Vol. 72, pp.181-190, 2003.

• Rahman, N., Nabi, T.G., Jan, T., “Effect of different growth regulators and types of cuttings on rooting of guava (Psidium guajava L.)”, Quart. Sci. Vis., Vol. 9, pp. 1-5, 2004.

• Sadeghi, H., Planting, Cultivation and Harvesting of Olive. Agricultural Education Publication, Karaj, Iran, 2002.

• Sebastiani, L., Tognetti, R., Dipaolo, P., Vitagiano, C., “Hydrogen peroxide and indole-3-butyric acid effects on root induction and development in cuttings of Olea europaea L. (cv. Frantoio and Gentile di Larino)”, Adv. Hort. Sci., Vol. 16, pp. 7-12, 2002.

• Tagliavini, M., Looney, N.E., “Response of peach seedlings to root zone temperature and root applied growth regulators”, Hort. Sci., Vol. 26, pp. 870-872, 1991.

• Westwood, M.N., Temperate-Zone Pomology: Physiology and Culture. 3rd Ed. Timber Press, Portland, Oregon, USA, 1993.

• Weisman, Z., Lavee, S., “Enhancement of IBA stimulatory effect on rooting of olive cultivar stem cuttings”, Sci. Hort., Vol. 62, pp. 189-198, 1995.

• Wiesman, Z., Lavee, S., “Vegetative growth retardation improve rooting and viability of olive in response to application of growth retardants”, Plant Growth Regul., Vol. 14, pp. 83-90, 1994.

• Wiesman, Z., Riov, J., “Interaction of paclobutrazol and indole-3-butyric acid in relation to rooting of mung bean (Vigna radiata) cuttings”, Physiol. Planta., Vol. 92, pp. 608-612, 1994.

• Wiesman, Z., Zilberstein, M., Avidan, B., “Promotive effect of paclobutrazol on avocado roots”, Abst. Alon Hanotea, Vol. 49, pp. 444, 1995.

DOI: https://doi.org/10.24203/ajas.v5i4.4809


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.