The Effect of Photoperiod and Temperature on Flowering of Pycnosorus Thompsonianus
Keywords:
Daylength, Vernalisation, Cooling, Anthesis, Australian species, Visible bud stageAbstract
The flowering responses of Pycnosorus thompsonianus to day-lengths and temperatures were investigated to study the floral regulation of this potential ornamental plant in southern Queensland, Australia. Plants of different treatments were cooled at 20/10°C or kept at 30/20°C for 21 or 42 days under short day (SD), long day (LD), or short day for six weeks before transferring to long day (SDLD) in environment-controlled greenhouse bays during 2009 - 2010. LDs promoted earlier flowering and plants under LDs flowered regardless of temperature regimes. Cool temperatures and cooling periods were required for efficient flowering of plants under SDs, but were not important for plants under LDs and SDLDs. Forty-two percent of the plants under warm (30/20°C) SD remained vegetative after a 16-week growing period. Cooling for 21 days was sufficient for plant growth and floral development of the species. Daylength was more effective than temperatures for promoting earlier flowering and for increasing flower production.
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References
Bunker K.V., “Year-round production of Australian daisies (Asteraceae) as flowering pot plantsâ€. Sci. Hort. 61, 101-113, 1995.
Cave R.L., Johnston M.E., “Vernalization promotes flowering of a heat tolerant Calandrinia while long days replace vernalization for early flowering of Brunoniaâ€. Sci. Hort 123, 379-384, 2010.
Day S., Loveys B.R., Aspinall, D., “Manipulation of flowering and vegetative growth of Brown Boronia (Boronia megastigma Nees.) and White Myrtle (Hypocalymma angustifolium Endl.) using plant growth regulatorsâ€. Sci. Hort. 56, 309-320, 1994.
Dawson, I.A., King, R.W., “Effect of environment and applied chemicals on the flowering and form of Geraldton Wax (Chamelaucium uncinatum Schauer)â€. Sci Hort 54, 233-246, 1993.
Everett J., Doust, A.N.L., “New species and a new combination in Pycnosorus (Asteraceae: Gnaphalieae)â€. Telopia 5, 39-43, 1992.
Friis, K., Christensen, O.V., “Flowering of Centradenia inaequilateralis `Cascade' as influenced by temperature and photoperiodâ€. Sci. Hort. 41, 125-130, 1989.
Halevy, A.H., Shlomo, E., Shvartz, M., “Environmental factors affecting flowering of rice flower (Ozothamnus diosmifolius Vent.)â€. Sci. Hort 87, 303-309, 2001.
King, R.W., Dawson, I.A., Speer, S.S., “Control of growth and flowering in two Western Australian species of Pimeleaâ€. Aust. J. Bot. 40, 377-388, 1992.
King, R.W., Pate, J.S., Johnston, J., “Ecotypic differences in the flowering of Pimelea ferruginea (Thymelaceae) in response to cool temperaturesâ€. Aust. J. Bot 44, 47 – 55, 1996.
King, R.W., “Dual Control of Flower Initiation and Development by Temperature and Photoperiod in Hardenbergia violaceaâ€. Aust. J. Bot., 46, 65-74, 1998.
Motum, G.J., Goodwin, P.B., “The control of flowering in kangaroo paw (Anigozanthos spp.)â€. Sci Hort 32,, 123-133, 1987.
Mott J.J., McComb A.J ., “Role of photoperiod and temperature in controlling phenology of three annual species from an arid region of Western Australiaâ€. J. Ecol. 63, 633-641, 1975.
Moncur, M.W., “Effect of low temperature on flora induction of Eucalyptus lansdowneana F. Muell & J. Brown subsp. Lansdowneanaâ€. Aust. J. Bot. 40, 157 – 167, 1992.
Pearson S., Parker A., Hadley P., Kitchener H.M., “The effect of photoperiod and temperature on reproductive development of Cape Daisy (Osteospermum jucundum cv ‘Pink Whirls’)â€. Sci. Hort 62, 225-235, 1995.
Putterill, J., Laurie, R., and Macknight, R., “It is time to flower: the genetic control of flowering timeâ€. BioEssays 26: 363-373, 2004.
Sedgley M., “Some effects of temperature and light on floral initiation and development of Acacia pycnanthaâ€. Aust J. Plant Physiol. 12, 109-118, 1985.
Seaton, K.A., Plummer J.A., “Observations on environmental control of flowering of Qualup bell (Pimelea physodes)â€. Aust. J. Exp. Agric. 44, 821- 826, 2004.
Sharman K.V., “Sedgley M., Floral initiation and development in Helipterum roseum (Hook.) Benth. and Helichrysum bracteatum (Vent.) Andrews (Asteraceae)â€. Aust. J. Bot. 35, 575-587, 1988.
Sharman K.V., Sedgley M., Aspinall D., “Effects of photoperiod, temperature and plant age on floral initiation and inflorescence quality in the Australian native Daisies Helipterum roseum and Helichrysum bracteatum in relation to cut-flower productionâ€. J. Hort. Sci. 64,, 351-359, 1989.
Tanigawa T., Kunitake T., Matsuno T., Yamada A., "Effects of cutting time and low-temperature treatment of rooted cuttings on stem elongation and leaf number in cultivars of Chrysanthemum morifolium Ramat." Journal of the Japanese Society for Horticultural Science 78.2: 218-223, 2009.
Wahyuni, S., Krisantini, S., Johnston, M.E., “Plant Growth Regulators and Flowering of Brunonia and Calandrinia sp.â€, Sci. Hort. 128, 141-145, 2011.
Yeh D.M., Atherton J.G., Craigon J., “Manipulation of flowering in cineraria. III. Cardinal temperatures and thermal times for vernalizationâ€. J. Amer, Soc. Hort. Sci. 72, 379-387, 1997.
Yoo, K.C., “Studies on the physiology of bolting and Flowering in Raphanus sativus L.†J. Korean Soc. Hort. Sci.18, 157-161, 1977.
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