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The influence of temperature and water potential on rooting of poinsettia cuttings (Euphorbia pulcherrima L. 'Lady')


, : The influence of temperature and water potential on rooting of poinsettia cuttings (Euphorbia pulcherrima L. 'Lady'). Acta Horticulturae (54): 127-136

The results are presented of rooting trials with poinsettia cuttings inserted in blocks of Grodan (rockwool), Jiffy-7 and Jiffy-9 (both peat-based). The water retention curves and O2 diffusion rates were determined for the 3 types of block. Rooting was inhibited when the blocks were subjected to nil tension (0 cm) at which the respective air contents of the 3 block types were 2.7, 1.7 and 3.2% by volume. As the tension rose to 8 cm the rooting percentage increased.

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Related references

Gislerod H.R., 1975: The influence of temperature and water potential on rooting of poinsettia cuttings euphorbia pulcherrima cultivar lady. Acta Horticulturae (Wageningen) 54: 127-136

Lee L.W.; Sanderson K.C.; Williams J.C., 1983: Rooting of poinsettia euphorbia pulcherrima cuttings treated with various fungicides in iba talc powder. Cuttings of poinsettia (E. pulcherrima Willd.) treated with a basal dip of 0.1% IBA alone (control) or in combination with 5% ferbam (ferric dimethyldithiocarbamate), benomyl [methyl 1-(butyl-carbamoyl)-2-benzimidazole-carbamate], metalaxyl [N-(2,...

Lee, L.;;, 1983: Rooting of poinsettia cuttings treated with various fungicides in IBA indolebutyric acid-talc powder Euphorbia pulcherrima

Lee, L.; Sanderson, K.1; Williams, J., 1983: Effect of fungicides applied to polyurethane propagation blocks on rooting of poinsettia cuttings Euphorbia pulcherrima. HortScience 18(3): 359-360

Lee L.W.; Sanderson K.C.; Williams J.G., 1983: Effect of fungicides applied to poly urethane propagation blocks on rooting of poinsettia euphorbia pulcherrima cuttings. All fungicides applied as dips to polyurethane propagation cubes prior to propagation of poinsettia (E. pulcherimma Willd.) cuttings inhibited rooting at the concentrations employed. Least inhibition of rooting resulted from dips containing (per l...

Cantaragiu,I.; Toma,F., 2008: Researches concerning the influence of the rooting media on the cuttings rhizogenesis of Euphorbia pulcherrima Willd ex Klotzsch. Studies were conducted in Romania to assess the influence of the rooting media on the cuttings' rhizogenesis of <i>E. pulcherrima</i> during 2006 and 2007. Six rooting media were used: red peat, peat pellets, sand, perlite, red pe...

Kristoffersen, T., 1969: Influence of daylength and temperature on growth and development in poinsettia (Euphorbia pulcherrima Willd.). Plants of the cvs Viking and Paul Mikkelsen were subjected to natural light and different day and night temperatures during July and August. Stem growth was stimulated considerably by increasing day or night temperatures. Plants of Annette Hegg ex...

Barrett J.E.; Nell T.A., 1986: Water relations and water potential measurements for vegetative poinsettia euphorbia pulcherrima cultivar eckespoint c 1 red. Pressure chamber and thermocouple psychrometer measurements of leaf water potentials in vegetative Euphorbia pulcherrima Willd. cv. Eckespoint C-1 Red were evaluated. The 2 methods agreed within 0.2 MPa between -0.3 and -1.8 MPa and were equal at...

Langhans, R.W.; Miller, R.O., 1960: Influence of daylength, temperature and number of short days on the flowering of poinsettia (Euphorbia pulcherrima). In this study only constant temperatures were used. It was found that as the temperature provided was increased from 60 degrees F. to 80 degrees F., shorter day lengths were necessary for flowering and the number of short days required increased....

Sochacki, D.; Chmiel, H., 1994: Effect of several factors on rooting of poinsettia (Euphorbia pulcherrima Willd.). In trials with the cultivar Anette Hegg Diva the 4 factors studied were: (1) striking dates (3 and 18 July, 4 and 20 Aug. and 4 Sep.), (2) substrate effect (peat:perlite (1:2), peat:perlite (2:1), peat:sand (1:1) or peat only), (3) effect of diffe...