ISHS Acta Horticulturae 766: XXVII International Horticultural Congress - IHC2006: International Symposium on Ornamentals, Now!
IN VIVO PROPAGATION OF EUPHORBIA MILII × LOPHOGONA HYBRIDS FOR POT PLANT PRODUCTION |
| Authors: | G. Fascella, G.V. Zizzo, S. Agnello |
| Keywords: | cuttings, substrates, NAA, cultivars, rooting, acclimatization, Euphorbia × lomi |
| Abstract:
Euphorbia milii × lophogona Rauh are hardy, succulent shrubs (Spurge family) characterized by spiny stems (1-1.5 m high) with continuous flowering. These hybrids are widespread diffused and normally grown as potted flowering and garden plants or for landscaping but information on the propagation methods is very limited. In order to define a mass multiplication protocol for pot plant production, a trial of in vivo propagation of 6 Thai hybrids was carried out with the aim to evaluate the effects of substrates, plant growth regulators and cultivar-type on cuttings rooting and plant acclimatization. Cuttings were placed into greenhouse bottom-heated benches filled with perlite and perlite/coir dust (1:1, v/v) and 50% of the material was treated with 0.4% NAA. Rooted cuttings were transferred into pots with a mixture of peat and perlite (2:1, v/v) for acclimatization. Cuttings in perlite resulted to highest rooting percentage, root length and number of acclimatized plants than those in an organic substrate. The application of NAA resulted in higher rooting capacity and higher average number of roots per cutting than the control. Tested cultivars differed for all the considered parameters. | |
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