• Horticultural Science & Technology
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• v.16 no.1
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• pp.33-36
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• 1998

This study was carried out to examine the effects of cutting dates and rooting promoters on rooting of the Rhododendron mucronulatum Turcz. The rooting percentage in greenwood cutting was high in June and decreased after July 3, when reproductive growth began. The best rooting percentage(92.5%) occurred when cutting was completed on June 12. There was no difference in rooting potentials between the greenwood straight cutting and the greenwood heel cutting. Cuttings of R. mucronulatum for. albiflora showed high rooting percentage(85%) similar to the cuttings of R. mucronulatum. Dipping cuttings in NAA $2,000mg{\cdot}L^{-1}$ solution for 15 sec increased the rooting percentage up to 97.5%, and also promoted root growth.

• Journal of Practical Agriculture & Fisheries Research
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• v.17 no.1
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• pp.145-155
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• 2015

To investigate the practicality of a small scale softwood propagation plastic film tent and the rooting promoting effect of indole-3-butyric acid(IBA) for northern highbush blueberry, softwood cuttings of 3 varieties (Duke, Elizabeth, Elliot) were made after dipping in the IBA solutions of 100ppm, 300ppm, 500ppm, 1,000ppm for 2 hour, and 3,000ppm for 20 seconds, respectively. Two-way ANOVA confirmed the significant differences in the percentage of rooting of cutting, longest root length and rooting volume index (RVI) induced by IBA treatment, as well as the percentage of rooting of cutting and RVI among examined varieties. In particular, the highly significant difference was observed in th RVI for IBA treatment. However, there was no interactions between the auxin treatments and varieties. Spontaneous rooting ability (control) depends on the varieties, showing that the lowest rooting ability was observed in the 'Duke' (45%) followed by 'Elliot'(85%) and 'Elizabeth' (90%). In addition, the rooting of the examined 3 varieties were enhanced by both of short time (20sec) dipping treatment of low level solutions, and long time (2hr) dipping treatment of high level solution, with the remarkably promoted rooting of the 'Duke' cuttings.

• Journal of the Korean Institute of Landscape Architecture
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• v.22 no.2
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• pp.123-132
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• 1994

Tow-year-old Taxus cuspidata shoot cuttings were treated with various electrical impacts of cathode on their base and anode on their apex by normal and reverse source. The cuttings were previously treated with 200ppm IBA for 12 hours and the rooting percentage, the length, and the weight of roots were checked. The auxin contents of cuttings were also examined by high-performance liquid chromatography. The results obtained on this study are as follows; 1. Normal treatment, cathode into the base and anode into apex, seemed to accelerate rooting while reverse treatment showed less effective than normal treatment on rooting, but both treatments were more effective than control. 2. The impact of electrical treatment at 30mV for 30min has a remarkable effect on the percentage rooting, the length, and the weight of roots. 3. Root primordia were formed at the basipetal end of cuttings where the end of primary pith ray meets the cambium in control treatment and formed at the basal part of cuttings irregularly in electrical treatment. 4. High-performance liquid chromatography showed electrical treatment was more effective on auxin accumulation than control, and 30mV-30min was the most effective on auxin accumulation.

• Korean Journal of Plant Resources
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• v.35 no.6
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• pp.770-777
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• 2022

The main objective of this study was to identify the most appropriate condition for root formation of in vitro micropropagated pear (Pyrus spp.) plants. In vitro propagation was induced on Murashige and Skoog (MS) medium with 2.0 mg/L of N6-benzyladenine (BA) and 0.2 mg/L of Indole-3-butyric acid (IBA) medium. The short pre-treatment of explants with a high concentration (1 mg/L) of NAA and IBA (R0 medium) in dark for three days, followed by transfer to five different media (R1 to R5) resulted in good rooting responses in the pear 'Oharabani (P. pyrifolia × P. communis)' genotype. For the rooting experiments, the highest rooting percentage (83.3 ± 8.3%), average root length (3.6 ± 1.9 mm), total root number (31 ± 4.0), and average root number per plant (2.6 ± 2.1) were obtained on half strength (1/2) of MS medium supplemented with 30 g/L sucrose without hormones and activated charcoal (AC) (R1 medium). The highest rooting percentage was obtained at 83.3% from explants on R1 and R3 media. The rooting procedure described in this study resulted in good root formation and significantly shorting the root induction time to within 14 days of culture. Further studies are underway to test the suitability of the protocol developed in this study for other pear genotypes.

• Korean Journal of Environment and Ecology
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• v.29 no.6
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• pp.842-849
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• 2015

This study investigated the effects of rare-earth fertilizer on the shoot cuttings' rooting of Vitex rotundifolia L. and Tamarix chinensis Lour. The shoot cutting test was carried in 2008 and the main results are summarized as follows. The rate of rooting and the average roots increased in both number and length when rare-earth fertilizer is treated in V. rotundifolia and T. chinensis in comparison to those of the untreated control plot. In particular, when rare-earth fertilizer is diluted with water 1/2500, the rooting outstandingly increases. This result is almost similar to the effect of the rooting stimulant, IAA. Although there is no differentiation in its rooting rate according to the density, the rooting of T. chinensis shows a 100 percent effect on in the entire treated plot but not in the untreated control plot, so it is usable as a rooting stimulant. As for shoot cuttings' rooting, depending on the time immersed in diluted solution of rare-earth fertilizer, both V. rotundifolia and T. chinensis showed relatively higher percentages in all treatment plot immersed for 60 minutes than for 10 minutes. In conclusion, considering the results of the rooting percentage and the average number and length of roots of V. rotundifolia and T. chinensis, the shoot cuttings' rooting appeared higher in percentage when they were immersed in the rooting stimulant for sixty minutes with a lower density than 1/2500. This result shows that rare-earth fertilizer can be utilized as an alterative for IAA rooting stimulants currently available in the market.

• FLOWER RESEARCH JOURNAL
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• v.16 no.1
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• pp.71-75
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• 2008

The object of this study was to determine the optimum concentrations of boron and IBA and dipping time, and to investigate the effect of combined-treatment of boron and IBA for the improvement of rooting of semi-hardwood cutting of Styrax japonica. The rooting percentage and the number of roots of cuttings increased with short dipping treatment of $7,000mg{\cdot}L^{-1}$ IBA and combined treatment of $100mg{\cdot}L^{-1}$ IBA and $20mg{\cdot}L^{-1}$ boron or $100mg{\cdot}L^{-1}$ IBA and $60mg{\cdot}L^{-1}$ boron. The rooting percentage, no. of roots and fresh weight were higher in combined treatment of boron and IBA than treatment of IBA alone. Either $100mg{\cdot}L^{-1}$ or $200mg{\cdot}L^{-1}$ was regarded as in appropriate level of IBA and the optimal dipping time was three hour in single treatment of IBA. It is concluded that the combined treatment of low concentrations of IBA and boron could be substituted for the treatment of high concentration IBA.

• Korean Journal of Plant Resources
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• v.25 no.6
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• pp.739-744
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• 2012

The plant Empetrum nigrum, valued in the traditional system of medicine, is well known for its antibacterial, antifungal, and antioxidant properties. In the present work, the effect of removal of shoot apical meristem (SAM) on shoot proliferation was studied. It was observed that removal of SAM promoted shoot proliferation whereas intact tip resulted in higher survival percentage. Further, the effect of different concentrations of BA on above was also studied. During root formation the effect of light quality after treatment with IBA was investigated. For rooting, continuous red light without IBA resulted in maximum rooting percentage. The above factors when taken into consideration during micropropagation of this endangered plant can result in healthier plantlets. The results show that the species could be successfully conserved by in vitro propagation system.

• Korean Journal of Plant Resources
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• v.11 no.2
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• pp.157-162
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• 1998

This study was conducted to examine the effects of media, crown position, clone ,a nd plant growth substances upon the rootability of cuttings for the establishment of the method of mass production by cutting of Dendropanax morbifera Lev. the artifical soil mixtureof vermiculite, perlite and peatmoss (1 : 1 : 1 v/v/v) with IBA 100mg /l treatment was most effective on the rooting rate (85%) was obtained with semihardwood cuttings, which were collected early-August after the first growing seasons. The effect of crown position on rooting of cuttings were obsreved. Average percentage rooting of cuttings on crown position showed 78% , 72% and 65% in middle , upper and lower part with IBA 100mg/l treatment , respectively. Among the four treatment levels of IBA, the highest rooting rate was observed in 100mg/l IBA treatment.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.27 no.1
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• pp.72-77
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• 1982

To develop a new propagation method of Korean ginseng (Panax ginseng C.A. Meyer) by cutting, stem cuttings with leaflets obtained from ginseng seedlings were planted in rooting media treated with three levels of NAA concentration. NAA solution of 1.0 ppm was the most effective for the rooting of ginseng stem cuttings as well as for root growth after initiation of the roots from cuttings. A mixture of sand and leaf compost as a rooting medium for ginseng stem cuttings showed the best results in rooting percentage of cuttings and root growth after rooting. An acril film cap covering was very effective to prevent water loss by transpiration from the leaflets of stem cuttings and for rooting and root growth after rooting. Cuttings of leaf petiole with 5 leaflets from 2 year old ginseng plants showed good rooting as well as root growth after rooting in a mixture of sand and leaf compost treated with 1.0 ppm NAA.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.6 no.6
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• pp.25-28
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• 2003

This study was conducted to development of rapid propagation method by leaf cuttings in Hibiscus hamabo native to southern seaside of Korea, and special object of this study was to determine the effects of IAA, IBA, and NAA on rooting in leaf cuttings of H. hamabo. Rooting was promoted by dipping treated with IAA and IBA. And rooting percentage was greatest at 1,000 and 2,000$mg{\cdot}L^{-1}$ IBA. At higher concentrations of IAA and IBA, more adventitious roots were developed. Also, IAA at high concentrations (above 2,000$mg{\cdot}L^{-1}$) and IBA ranged from 500~2,000$mg{\cdot}L^{-1}$ promoted on root number and rootingratio. However, root formation in Hibiscus leaf cuttings inhibited by NAA application.