Effect of growth regulators on rooting of Three Citrus rootstock propagated in vitro

Abstract

oft cuttings 15cm of three citrus rootstocks (Carrizo citrange, Troyer citrange, Swingle citrumello) which propagated in vitro and transplanting in Green house, and rooted in diluted solution at (0.0, 10NAA,10 IBA, 10 NOA, 10NAA+2IBA, 10 IBA+2NAA, 10NOA+2IBA) mg/L and Concentrated solution at (0.0, 1000 IAA,1000 IBA,1000 NAA,1000 NOA mg/L and Serdix, Serdix with sol.). Data of Rooting percentage, number of roots per plant after (40,50) days and their root lengths were investigated. Results showed that diluted solution significant effect on all character after (40,50) days, Based on diluted solution (10NAA+2 1BA) mg/L showed the highest rooting percentage, root per shoot, length of shoot reached (60%, 1.47 root/culting, 3.69cm ), respectively after 50 day While, there was no significant effected of concentrated solution in Rooting percentage after 40 days, 1000mg/L IAA gave highest rooting percentage reached 66.67% and highest mean in roots per shoot and length (1.53 root/culting , 2.77cm) respectively , after 50 days. There was no significant effect of stocks on Rooting percentage by using diluted and concentrated solution While, Troyer citrange showed highest mean in number of root reached 1.2 root/ culting, Carrizo citrange gave highest mean in length of roots reached 2.33 cm by using concentrated solution.