Stimulation of vegetative propagation with auxins in rosemary (Rosmarinus officinialis L.) and sage (Salvia officinialis L.)
Abstract
Phytohormones have been at the center of plant physiology research for more than a century. Research of plant hormones, has at times been considered as a rather vague subject, but the systematic application of genetic and molecular techniques has led to key insights that have revitalized the field. Since the discovery of auxin until today, the relationship of these phytohormones with the development of the root system is very close. In recent decades the role of auxin in the vegetative propagation, especially in the production of seedlings, is important at the stimulation of rooting process of seedlings and cuttings.
In this research is examined the stimulation of vegetative propagation at cuttings from aromatic species rosemary (Rosmarinus officinialis L.) and sage (Salvia officinialis L.), using auxins IAA, IBA, NAA and commercial hormone K1 - Radicin, compared to control K where there is no presence of auxin. Research is carried out in three settings, at two different periods spring/summer and autumn/winter, in adapted plastic tunnel conditions, where some morphological characteristics and the percentage of rooted cuttings were examined. Studies have shown that the use of IAA, IBA and NAA at concentration of 5 ppm may increase the percentage of rooted cuttings in rosemary up to 100%, which equals with the effect of the commercial product at the period spring/summer.
Key words: rooting, vegetative propagation, IAA indole-3-acetic acid, IBA indole-3-butric acid, NAA a naphthaleneacetic acid.
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