Effect of polyamines on vegetative characteristics and endogenous hormones in hydroponic grown 'Dulce Vita' rose
Polyamiones (PA) are one of the most important plant growth substances which have a major role in different physiological responses, especially flower induction, development and senescence. In order to study the effect of polyamine foliar application on physiological and biochemical properties of 'Dulce Vita' rose plants, an experiment was conducted in a completely randomized block design on hydroponic grown rose. During growth, plants were sprayed with putrescine (Put) (1, 2, 3 mM), spermidine (Spd) (0.5, 1, 1.5 mM) and spermine (Spm) (1, 2, 4 mM) and control (distilled water). Consequently vegetative characteristics and endogenous hormones were studied. Results indicate that 1.5 mM Spd application resulted in the highest cut flower stem length and flower bud size. Between the different applied PAs, Spd had the most beneficial effect on vase life. Application of PA increased vase life, but the increment was not significant. The applied PAs did not have a significant effect on other vegetative characteristics such as leaf chlorophyll content, flower bud diameter and stem diameter. Endogenous level of plant hormone were also affected by PA treatment. 4 mM Spm significantly increased endogenous levels of Aux, Cyt and GA.
Hosseini-Farahi, M. and Jowkar, M.M. 2016. Effect of polyamines on vegetative characteristics and endogenous hormones in hydroponic grown 'Dulce Vita' rose. Acta Hort. (ISHS) 1131:147-154
PGR, putrescine, soilless culture, spermidine, spermine