PEMBUNGAAN Eucalyptus occidentalis PADA PERPANJANGAN MASA PENYINARAN DAN PACLOBUTRAZOL

Rina Laksmi Hendrati

doi:10.20886/jpth.2008.2.3.277-286

PEMBUNGAAN Eucalyptus occidentalis PADA PERPANJANGAN MASA PENYINARAN DAN PACLOBUTRAZOL

Rina Laksmi Hendrati

Abstract

Flowering stimulation were investigated to accelerate deployment of E. occidentalis. It was found that extended daylength (16-h) in juvenile plants stimulate flowers of very limited individuals/family with less number of buds than normal inflorescences. Extended daylength (16-h) promote flowering of most families from 2 year-old E. occidentalis plants. In combination with paclobutrazol (1 mg. a.i/mm), number of buds were doubled. Under 16-h daylength, juvenil plants were taller up to 25 weeks than under natural light but shorter for family 96-LM that produced more flowers than others. There were no height differences between 16-h daylength and in combination with paclobutrazol in 2-year old plants.

Keywords

Extended light, paclobutrazol, Eucalyptus occidentalis, flowering

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References

Aldwinckle, H. S. 1975. Flowering of apple seedlings 16-20 months after germination. HortScience 10; 124-126.

Aron, Y., Monselise, S., Goren, R., and Costo, J. 1985. Chemical control of vegetative growth in citrus trees by paclobutrazol. Hortscience 20; 96-98.

Blakely, W. F. 1955. "A key to eucalyptus." Forestry and Timber Bureau, Canberra, Australia.

Bolotin, M. 1975. Photoperiodic induction of precocious flowering in a woody species Eucalyptus occidentalis Endl. Botanical Gazette 136; 358-365.

Drinnan, A. N., and Ladiges, P. Y. 1991. Floral development and systematic position of Eucalyptus curtisii (Myrtaceae). Australian Systematic Botany 4; 539-551.

Eldridge, K., Davidson, J., Harwood, C., and Van Wyk, G. 1994. "Eucalyptus domestication and breeding," Clarendon Press, Oxford University, Oxford, UK.

FAO 1981. "Eucalyptus for planting," Forestry Series no 11, FAO, Rome, Italy.

Gardner, C. A. 1987. Eucalyptus of Western Australia, WA Herbarium, Dept. Agriculture of Western Australia, Perth, Australia.

Goldschmidt, E. E., Aschkenazi, N., Herzano, Y., Scaffer, A. A., and Monselise, S. P. 1985. A role of carbohydrate levels in the control of flowering in citrus. Science Horticulturae. 26; 159-166.

Griffin, A. R., Whiteman, P., Rudge, T., Burgess, I. P., and Moncur, M. W. 1993. Effect of paclobutrazol on flower-bud production and vegetative growth in two species of Eucalyptus. Canadian Journal of Forest Research 23; 648-656.

Grossman, K. 1990. Plant growth retardants as tools in physiological research. Physiologia Plantarum 78; 640-648.

Guardiola, J. L., Monerri, C., and Agusti, M. 1982. The inhibitory effect of gibberelic acid on flowering in citrus. Physiologia Plantarum 55; 136-142.

Guries, R. P. 1990. Forest Genetics and Forest Tree Breeding. In "Introduction to forest science" (R. A. Young, Giese, RL, ed.). Second edition, John Wiley & Sons, Brisbane, Australia.

Harty, A. R., and Van Staden, J. 1988. Minireview, The use of growth retardant in citriculture. Israel Journal of Botany 37; 155-64.

Hasan, O., Potts, B. M., and Reid, J. B. 1992. Chemical promotion of flower bud initiation in Eucalyptus globulus. In "Proceedings of a symposium on mass production technology for genetically improved fast growing forest tree species" (J. S. Marnier, Hubert, CL, Alazard, P, ed.), AFOCEL/IUFRO, Bordeaux.

Hasan, O. 1993. The effect of paclobutrazol on flowering activity and gibberellin levels in Eucalyptus nitens and Eucalyptus globulus, PhD thesis, The University of Tasmania, Hobart, Australia.

Hedden, P., and Graebe, J. E. 1985. Inhibition of gibberellin biosynthesis by paclobutrazol in cell-free homogenates of Cucurbita maximaendosperm and Malus pumilab embryos. Journal of Plant Growth Regulator 4; 111-122.

Hetherington, S., and Jones, K. M. 1991. The effect of paclobutrazol on the growth of Eucalyptus globulus seedlings. Canadian Journal of Forest Research 20; 1811-1813.

Kanellos, E. A. G., and Pearson, S. 2000. Environmental regulations of flowering and growth of Cosmos atrosanguienus (Hook) Voss. Science Horticulturae 83; 265-274.

Libby, W. J. 1992. Use of genetic variation for breeding forest trees. In "Plant Breeding in the 1990s" (H. T. Stalker, Murphy, JP, ed.). CAB International, Oxon, UK.

Marini, R. P. 1986. Growth and cropping of 'Redhaven' peach trees following foliar applications of flurprimidol and paclobutrazol. Journal of American Society Horticultural Science 111; 849-853.

Mauk, C. S., Unrath, C. R., Blakenship, S. M., and Lehman, L. J. 1990. Influence of growth regulator treatments on dry matter production, fruit abscission and 14C-assimilate partitioning in citrus. Journal of Plant Growth Regulator 5; 111-120.

Moncur, M. W., and Hasan, O. 1994. Floral induction in Eucalyptus nitens. Tree Physiology 14; 1303-1312.

Moncur, M. W., Rasmussen, G. F., and Hasan, O. 1994. Effect of paclobutrazol on flower-bud production in Eucalyptus nitens espalier seed orchards. Canadian Journal of Forest Research 24; 46-49.

Moncur, M. 1998. Hastening Seed Production: a tool for increasing the rate of genetic improvement in Eucalypt species, In S. Puri, ed. Tree improvement: applied research and technology transfer. Science Publishers, Inc. Enfield, USA.

Mouradov, A., Cremer, F., and Coupland, G. 2002. Control of flowering time. Interacting pathways as a basis for diversity. Plant Cell and Environment 14; 111-1130.

Nikkanen, T., and Ruotsalainen, S. 2002. Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway Spruce Seed Orchard. Silvae Fennica 34; 205-222.

Reid, J.B., Hasan, O., Moncur, M.W., and Hetherington, S. 1995. Paclobutrazol as a management tool for tree breeders to promote early and abundant seed production In: BM Potts, NMG Borralho, JB Reid, RN cromer, WN Tibbits and CA Raymond (Eds) Eucalyptus Plantation: Improving Fibre Yield and Quality. Proc. CRC-IUFRO Conf. Hobart. 293-298.

Sedgley, M., and Griffin, A. R. 1989. "Sexual reproduction of tree crops," Academic Press, London, UK.

Snowball, A. M., Warrington, I. J., Halligan, E. A., and Mullins, M. G. 1994. Phase change in citrus: the effects of main stem node number, branch habit and paclobutrazol application on flowering in citrus seedlings. Journal of Horticultural Science 69/1; 149-160.

Southerton, S. G. 2007. Early flowering induction and Agrobacterium transformation of the hardwood tree species Eucalyptus occidentalis. Functional Plant Biology 34; 707-713.

Talbert, C. B. 1992. Quantitative Genetics:Why Bother? In "Handbook of Quantitative Forest Genetics" (L. Fins, Friedman, ST, Brotschol, JV, ed.). Kluwer Academic Publishers. Dordrecht, The Netherlands.

Williams, D. R., Potts, B. M., and Smethurst, P. J. 2003. Promotion of flowering in Eucalyptus nitens by paclobutrazol was enhanced by nitrogen fertilizer. Canadian Journal of Forest Research 33; 74-81.

Zohar, Y. 1975. (Abstract) The phenology of Eucalyptus occidentalis Endl (Hebrew). La-Yaaran 25; 12-16.

DOI: https://doi.org/10.20886/jpth.2008.2.3.277-286