ONTOGENIC STAGE, AUXIN TYPE AND CONCENTRATION INFLUENCE ROOTING OF OXERA SULFUREA STEM CUTTINGS

Within the program for the development of New Caledonia’s new ornamental native plants, we have studied the vegetative propagation of Oxera sulfurea, a species belonging to a promising ornamental genus.
This paper reports the results of experiments aimed at detecting the effect of ontogenic stage and auxin type and concentration on the rooting of stem cuttings of this species.
Three auxins, 4-indole-3-ylbutyric acid (IBA), 2-(1-naphtyl) acetic acid (NAA) and indol-3-ylacetic acid (IAA) respectively at four (10, 20, 40, 80 g kg^-1), two (1, 2 g kg^-1) and two (5, 10 g kg^-1) concentrations were applied on semi-hardwood stem cuttings from both juvenile and adult like shoots.
Results indicate that juvenile stem cuttings root more easily than adults.
NAA and IAA had no or weak significant positive effect on rooting whereas IBA had positive effect at the lowest doses; however, rooting rate lienarly decraesed as function of IBA concentration.
The best rooting rates were obtained at 10g kg^-1 on juvenile cuttings while at 20 g kg^-1 on adults.

I International Symposium on the Labiatae: Advances in Production, Biotechnology and Utilisation

G. Gâteblé, M. Pastor

Vegetative propagation, growth stage, labiatae, new ornamental, New Caledonia

https://doi.org/10.17660/ActaHortic.2006.723.35