Vol. 81 No: 3

Title:
Influence of endogenous IAA levels and exogenous IBA on rooting and quality of leafy cuttings of Prunus 'GiSelA 5'

Authors:
M. ŠTEFANCIC, F. ŠTAMPAR and G. OSTERC

pp: 508-512

Abstract:
The influence of exogenously applied indole-3-butyric acid (IBA) on root and shoot development of leafy cuttings was analysed in Prunus cerasus × P. canescens ´GiSelA 5`, a dwarfing cherry rootstock, in two successive years. Compared to control cuttings, IBA application (4 g l^-1 in 2003; 2.5 g l^-1 in 2004) caused higher indole-3-acetic acid (IAA) accumulation in the cutting bases, but that did not influence the percentage of rooted cuttings, nor their survival in either year. However, IBA inhibited callus formation and, consequently, influenced the quality of the developed cuttings. Callus formation impeded root development, reducing the number of main roots, and inhibited the growth of the cuttings, reducing the average total length of shoots formed by individual cuttings. Callus formation was most reduced in the cuttings in the second experimental year, with high initial IAA concentrations.

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