Evaluation of the Morphological and Biological, And Regenerative Capacity of Stem Cuttings of Actinidia (Аctinidia Lindl.) Cultivars, When Introduced Into Industrial Culture in the Right-Bank Forest-Steppe Zone of Ukraine

Abstract

The article deals with the results of studies on the research of the morphological and biological features of rhizogenesis of stem cuttings and optimization of distinct stages of self-rooted reproduction of promising introduced cultivars of actinidia for growing high quality seedlings in order to use them in landscaping residential areas of the Right-Bank Forest-Steppe Zone of Ukraine. The studied cultivars of actinidia are characterized by high vegetative productivity, which is the biological basis for their propagation by stem cuttings.

It has been demonstrated that self-root propagation by stem cuttings facilitates the acceleration of the cultivation of introduced cultivars of actinidia seedlings largely; however, the basis of adventive root formation of this garden culture is a weak ability to regenerate adventive roots from the stem parts of growth shoots. In addition, the propagation of actinidia by cuttings has its own technological features, which depend on the growth and development of parental plants, the selection of cuttings on the shoot, the dates of propagation, the use of biologically active substances, the creation of optimal rooting conditions, etc.

The results of green stem cuttings rooting of actinidia cultivars, depending on the dates of propagation, the type of shoot and its metameric structure are presented in the study. It was determined that green stem cuttings of the studied actinidia cultivars have a weak regenerative capacity and are medium-rooted. The use of α-naphthylacetic acid (α-NOA) at concentrations of 10-15 mg/l helps to increase their regenerative capacity, shorten the growing time and increase the yield of standard seedlings.