Samaan, L., EL-Dengawy, E., EL-Zayat, M. (2010). RESPONSE OF HARDWOOD STEM CUTTINGS OF GUAVA (Psidium guajava L.) TO VARIOUS GROWTH AND ROOT PROMOTING REGULATORS.. Journal of Plant Production, 1(2), 301-317. doi: 10.21608/jpp.2010.86355
L. G. Samaan; E. F. A. EL-Dengawy; Maiada E. EL-Zayat. "RESPONSE OF HARDWOOD STEM CUTTINGS OF GUAVA (Psidium guajava L.) TO VARIOUS GROWTH AND ROOT PROMOTING REGULATORS.". Journal of Plant Production, 1, 2, 2010, 301-317. doi: 10.21608/jpp.2010.86355
Samaan, L., EL-Dengawy, E., EL-Zayat, M. (2010). 'RESPONSE OF HARDWOOD STEM CUTTINGS OF GUAVA (Psidium guajava L.) TO VARIOUS GROWTH AND ROOT PROMOTING REGULATORS.', Journal of Plant Production, 1(2), pp. 301-317. doi: 10.21608/jpp.2010.86355
Samaan, L., EL-Dengawy, E., EL-Zayat, M. RESPONSE OF HARDWOOD STEM CUTTINGS OF GUAVA (Psidium guajava L.) TO VARIOUS GROWTH AND ROOT PROMOTING REGULATORS.. Journal of Plant Production, 2010; 1(2): 301-317. doi: 10.21608/jpp.2010.86355
RESPONSE OF HARDWOOD STEM CUTTINGS OF GUAVA (Psidium guajava L.) TO VARIOUS GROWTH AND ROOT PROMOTING REGULATORS.
1Department of Pomology, Fac. of Agric., Mansoura Univ., Egypt.
2Dept. of Pomology, Fac. of Agric., Damietta branch, Mans.Univ., Egypt.
Abstract
The present investigation was conducted to study the effect of 3 solutions of growth and root-induced regulators, Indolebutyric acid (IBA) at 4000ppm, Hydrogen Peroxide (H2O2) at 3.5% and Vitamin B12 at 24mg/L along with wounding process, either solely or in interactions, on rooting ability of hardwood cuttings of guava cv. Balady (Psidium guajava L.). The basal portion of wounded and non-wounded cuttings just before inserted in the planting medium (Sand and Peatmoss 1:1 v/v) were dipped in these solutions for 30 second each.
Growth and root-induced regulators were significantly affected buds burst and survival percentages per cutting. A similar effect was shown on number of shoots and leaves per cutting at 1.5-month-old, along with rooting percentage, primary roots number, primary root length and secondary roots number per cutting at 3 month-old. Maximum average of buds burst % at 8-week-old (81.52%) and buds survival % at 12-week-old (62.83%) along with more number of shoots/cutting (3.43 shoots), more number of leaves/cutting (5.75 leaves), maximum rooting percentage (70.67%), more primary roots number/cutting (24.96 roots) and maximum primary root length/cutting (8.38cm) were noticed in hardwood wounded cuttings pre-planting treated with dipping in H2O2 solution at 3.5% and in IBA solution at 4000ppm for 30 second each (T12). More secondary roots number/cutting (11.34 roots) was tabulated in wounded cuttings treated with wounding process only (T8). The corresponding average results in non-wounded treated cuttings indicated that maximum buds burst percentage (72.65%) was in cuttings treated with H2O2 solution (T3). Maximum buds survival percentage (53.05%), more shoots number per cutting (2.55 shoots), more leaves number/cutting (4.89 leaves), maximum rooting percentage (43.00%) and more primary roots number/cutting (16.65 roots) were observed in cuttings treated with H2O2 at 3.5% and IBA at 4000ppm for 30 second each (T5). Maximum primary root length/cutting (7.10cm) and more secondary roots number/cutting (5.67 roots) were recorded for non-wounded cuttings treated with IBA at 4000ppm for 30 second (T2).
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