Abstract
The experiment was carried out to investigate the effect of different concentration of Indole-3-butyric acid (IBA) on the rooting ability of semi-hardwood Bougainvillea flower. The treatments were control (without IBA), 2000, 3000 and 4000 ppm IBA. The cuttings were treated with IBA solution for 7 seconds and immediately transferred to the rooting medium. Perlite was used as a rooting substrate. Treatment was evaluated in a completely randomized design (CRD) with 3 replications. According to the obtained results, there was no significant difference between IBA treatment and control on rooting percentage. The best effect of different levels of IBA on the number of root (8.67 roots per plant) was obtained at 2000 ppm IBA. The highest root length (151.42 mm) was observed at control and there was no significant difference between control and 2000, 4000 ppm IBA. It can be concluded that using perlite as a rooting substrate without using IBA (control) affected rooting ability in bougainvillea flower.
Highlights
The genus Bougainvillea, in the Nyctaginaceae (Four-o’clock) family of plants, has 14 species, with three that are horticulturally important
Auxins are widely used for promoting rooting of hardwood cuttings (Leaky et al, 1982; Smith, 1986; Hartman et al, 1990), so Indole-3-butyric acid (IBA) was used as a rooting hormone
There was no significant difference between IBA treatment and control on rooting percentage
Summary
The genus Bougainvillea, in the Nyctaginaceae (Four-o’clock) family of plants, has 14 species, with three that are horticulturally important. Bougainvillea is used to decorate fences and arbors with explosions of color in the house corridor, office and play ground. Bougainvillea is a great vine for large containers to decorate hot patios and plazas. Bougainvillea is used to create beautiful flowering bonsai specimens (Sharif Hossain et al, 2007). Softwood terminals, maturing green wood, and matured intermediate wood stem pieces can be used for propagation of Bougainvillea flower (Hacket et al, 1972). Softwood terminals of easy-to-root cultivars do not require a rooting hormone. A rooting hormone such as IBA (3-indolebutryic acid) at 2000-6000 ppm is commonly used (Kobayashi et al, 2007). Higher concentrations may be needed with more difficult-to-root cultivars (Gilman, 1999)
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