Propagation of Ornamental Plants
20(2): 72-78, 2020
PROPAGATION OF ANIBA ROSAEODORA DUCKE BY ROOTED CUTTINGS
Olivier Monteuuis1* and Nadine Amusant2
1 CIRAD-BIOS, UMR AGAP, TA A-108/03 – Avenue Agropolis, 34398 Montpellier cedex 5, France, *E-mail: email@example.com
2 CIRAD-ES, UMR EcoFoG, INRA, CNRS, AgroParisTech, Université des Antilles – Guyane, 97310 Kourou, French Guiana, France
The possibilities of vegetatively propagating Aniba rosaeodora by rooting of cuttings were assessed through three successive experiments involving a total of 1120 cuttings. The rooting rates were significantly superior for 6 than for 18-month-old donor plants and using sand as rooting substrate rather than plain coconut fiber or mixed with sand or perlite (1 : 1 v/v). The cuttings rooted on sand produced also more roots than on coconut fiber mixed with perlite. Experiment 1 failed to point out any significant influence of the four auxin treatments (aqueous solutions of IAA, IBA, NAA each at 0.5% and a control without auxin) on rooting rates, by contrast with experiment 2 (0.001 < p < 0.01) and 3 (0.001 < p < 0.01). NAA treatment resulted in the lowest and highest rooting proportions in experiments 2 and 3 respectively, whereas IAA was superior to the control and inferior to IBA in both experiments for the same criterion. IAA treated cuttings produced also more roots than the control and less than the IBA treated ones in experiments 1 and 2, with the greatest numbers for NAA. The basal slice had no significant effect on the rooting rates and on the number of roots produced per rooted cutting compared to the control in the three experiments in absence of noticeable interaction between the different treatments. However, the 8 combinations of auxin × slice treatments assessed in experiment 3 influenced notably (0.001 < p < 0.005) the rooting rates, with the highest result of 95% for sliced cuttings treated with NAA.
Key words: adventitious rooting, ageing, auxin, basal slice, rooting substrate, vegetative propagation.