ISHS Acta Horticulturae 614: VI International Symposium on Protected Cultivation in Mild Winter Climate: Product and Process Innovation
EFFECT OF INDOLEBUTYRIC ACID AND PACLOBUTRAZOL ON THE ROOTING OF RHAMNUS ALATERNUS STEM CUTTINGS |
| Authors: | S. Bañón, J.J. Martínez, J.A. Fernández, J. Ochoa, A. González |
| Keywords: | cultar, auxin, cutting, propagation, wild species |
| DOI: | 10.17660/ActaHortic.2003.614.38 |
| Abstract:
Improving the rooting of Rhamnus alaternus stem cuttings should contribute to the production of homogeneous plants in the nursery and facilitate the successful transplantation and establishment of young plants in landscaping and ornamental situations. To this end, the ability of plant growth regulators to improve the rooting of native R. alaternus stem cuttings was investigated. The cuttings studied were taken from the apical part of the side shoots of one-year-old branches and rooting was carried out in heated benches covered by polyethylene tunnels. Indolebutyric acid (0, 100, 500 and 1000 ppm) and paclobutrazol (0, 100, 500 and 1000 ppm) were applied as a water solution. The former growth regulator increased the percentage of rooting when applied at 100 and 500 ppm and improved the quality of rooting (at 100, 500 and 1000 ppm), increasing the dry weight, number of roots, root total length and percentage of thick roots (Φ > 1 mm) compared with the control. However, it did not alter the root density or the number of forks. Paclobutrazol, on the other hand, strongly restricted all the plant parameters studied when concentrations of 500 and 1000 ppm were used. The last concentration of this compound totally inhibited root formation. However, the application of 100 ppm of paclobutrazol had a positive effect, increasing the percentage of rooting, root dry weight, root density and the percentage of thick roots compared with the control. | |
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