Rhipsalis grandiflora Haw. (Cactaceae) propagation by setem cuttings

Abstract

The genus Rhipsalis is being cultivated as a potted plant since the view of the pendant branches with coloured flowers and fruit is very appreciated. Considering that there is no information about the production of rooted propagules of these species, the goal of this work was to evaluate the development of stem cuttings, stimulated by the application of plant growth regulators. The indolebutyric acid (IBA) was tested at 0; 4.07; 5.81, and 11.63 mmol L-1 and the naphthaleneacetic acid (NAA) at 0; 4.53; 6.47, and 12.94 mmol L-1 for their activity in promoting roots on apical stem segments of Rhipsalis grandiflora Raw. The base of stem cuttings was dipped into auxin solutions mixed with talc and each one was partially embedded in fir bark (Pinus sp) and fern fiber (1:1) in polystyrene propagation flats, placed throughout the rooting period in a greenhouse (50% shading), at 60-90% of relative humidity and temperatures from 20 to 25ºC. The experimental design was a completely randomised with eight treatments (twelve replicates), with samplings at 0; 20; 50; 80, and 150 days. The results indicate no differences between IBA and NAA regarding the dry mass of roots, but an increase in for concentrations of 0 and 4.07 mmol L-1 of IBA and 0 and 4.53 mmol L-1 of NAA, in relation to treatments with auxins. Stem cuttings treated with 4.07 mmol L-1 of IBA and 4.53 mmol L-1 of NAA, had greater dry mass of shoot bud differentiation in relation to those treated with 0 mmol L-1.

Effects of Different Types and Concentrations of Auxins on Juvenile Stem Cuttings for Propagation of Potential Medicinal Dillenia suffruticosa (Griff. Ex Hook. F. and Thomson) Martelli Shrub

“…Seran and Umadevi (2011) reported that stem cuttings of Citruslimon L. treated with IAA were able to produce a large number of new leaves because they had developed a vigorous rooting system. Stancato et al (2003) showed that roots enabled cuttings to absorb more nutrients and produce more leaves. Cuttings with more new leaves and more shoots showed higher survivorship rates when grown in natural conditions (Pessarakli, 2002).…”

Effect of Various Concentrations of Rooting Hormones on Multiplication of Button Wood Tree (Conocarpus Erectus L.)

“…The minimum (2.33) number of leaves per cutting were recorded in control. Increase in leaf number may be due to vigorous rooting induced by the growth regulator enabling the cuttings to absorb more nutrients and thereby producing more leaves as reported by Stancato et al, (2003).…”

Propagation of Jasminum parkeri: A Critically Endangered Wild Ornamental Woody Shrub from Western Himalaya

“…The increase in auxin concentration positively influenced shoot formation in J. parkeri cuttings and treatment with IAA at 2000 ppm resulted in the production of the maximum number of leaves and greatest shoot length. According to Stancato et al [24], the escalation in leaf number could be due to the presence of a vigorous rooting system induced by auxin treatment, enabling the cuttings to absorb additional nutrients, thus resulting in the production of more leaves. Reddy et al [25] reported maximum cumulated shoot length (5.73 cm) in Pelargonium graveolens cuttings treated with IAA at 2000 ppm concentration.…”