PJB-2025-381
Effects of Auxin Derivatives (IBA and NAA) Applied at Different Doses and Durations on Rooting in Cuttings of Lemon Cypress (Cupressus macrocarpa)
Bilal ÇETİN
Abstract
This study investigated the effects of IBA and NAA applied at different doses and application times on the rooting performance of Cupressus macrocarpa cuttings. The study consisted of two separate experiments. The first experiment used two different hormones, five different hormone doses, and two different hormone application times. The second experiment analyzed rooting success using a design that included two different hormones, six different hormone doses, and two different hormone application times. The interaction between hormone type, hormone dose, and application times played a significant role in rooting success in the propagation of Cupressus macrocarpa cuttings in both experiments. In particular, IBA at a dose of 1000 ppm applied for 5 seconds yielded the highest results. However, it was found that low-dose applications, particularly NAA, resulted in lower rooting compared to the control. The results emphasize the need for careful selection of auxin doses and application times for Cupressus macrocarpa cuttings. Based on the results of this study, the 5-second immersion in the 1000 ppm dose solution of IBA auxin determined in our study indicates that the species can be used in future hardwood cutting production.
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