Effects of Putrescine and Salicylic acid on Flowering Characteristics of Ornamental plant Gazania Gazania spelendens

Abstract—A pot experiment was conducted in a completely randomized design, to study the effect of putrescine (PUT) and Salicylic acid (SA) application 50, 100 and 150 ppm was compared to the control (distillated water) on flowering Gazania (Gazania spelendens). Results were analyzed by SPSS software and Duncan test. Results showed that PUT and SA had positive effect on the number of days to flowering, number of florets per stand and other vegetative traits. Mean comparisons results indicated that the highest number of florets per plant (788.33) and the lowest number of days to flowering (128.20 days) were achieved by application of 150 ppm of PUT. The lowest number of florets per plant was achieved in control treatment (515.33) which was significantly different from 150 ppm of PUT. The highest number of days to flowering was obtained by 150 ppm of SA (139.70).

Key words: Gazania, Flowering, ornamental plants, Salicylic acid, putrescine