Action de l'acide indole butyrique sur l'enracinement des jeunes rejets de Palmier dattier

Abstract

Mots-cles : Palmier dallier-rejets -acide indole butyrique -enracinement.Abstract.-Treatment with indole-3-butyric acid (IBA) showed a significant effect on the rooting ability of young offshoots of two reputed Moroccan date Palm cultivars, Boufeggous (BFG) and Mejhoul (MJH). While 73.6% of rooting (the highest percentage for both genotypes confounded) was induced by 5% IBA, only 51.2% of offshoots produced roots without auxin. Further more, untreated offshoots formed fewer roots than those treated with IBA. Variation in rooting among offshoots from the two cultivars was highly significant in response to IBA: offshoots from MJH rooted highly (78.6%) with 5% IBA, while the highest rooting percentage (73.7%) was induced with 7% IBA in BFG. Moreover, offshoots from MJH produced significantly more roots per rooted offshoots and were more affected by the inhibitory effect of high concentration (15% IBA) than those from BFG. On the other hand, treatments with IBA combined to IAA were unfavourable for rooting. But combined treatments IBA-NAA, showed a significant effect when the IBAINAA ratio was superior to 1.

Germination of Cotyledonary Somatic Embryos into Plantlets on Coffea arabica L. of AS2K clone

“…The stimulatory effect of IBA on root formation has been reported in many other plant species. Exogenous IBA had a significant positive effect on the rooting responses of woody plants such as date palm [20], apple [21], and olive cultivar 'Moraiolo' [22].…”

In vitro ROOTING OF TENERA HYBRID OIL PALM (Elaeis guineensis Jacq.) PLANTS1

“…The presence of the IAA auxin in the culture medium can favor the root system, greater presence of secondary roots, lower formation of calluses, and good shoot development (Radmann, 2002). However, for woody species that root with difficulty, the IBA auxin has been successfully used in most studies, as, for example, in date palm (Qaddoury and Amssa, 2003), physic nut (Toppo and Sing, 2012), eucalyptus (Almeida et al, 2007;Brondani et al, 2014), and golden shower tree (Curti and Reiniger, 2014).…”