Akademik Veri Yönetim Sistemi
Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi, cilt.39, sa.1, ss.1-5, 2022 (Hakemli Dergi)
PGRs such as paclobutrazol, daminozide, chlormequat and propiconazole help to alter various growth characteristics of plants and they are used commonly in the modern production system of ornamental plants. The objective of this work was to evaluate the effects of the optimum dose, decreasing and increasing amounts of the optimum dose of paclobutrazol, daminozide, chlormequat and propiconazole used in the modern production system of zinnia (Zinnia elegans Jacq.) vegetative growth parameters and flowering in a greenhouse experiment. Plant height was reduced with the administration of 2 g L-1 of daminozide (T4) at a ratio of 20.87% compared to the control group. The plants treated with 1.5 ml L-1 of chlormequat (T9) had the highest main stem diameter, flower stalk diameter (4.50 mm) and side branch length (16.17 cm). It was determined that the highest side branch diameter (3.78 mm) and number of flower buds (4.67 per plant) were manifested with T4. The treatment of T4 can be used to increase the number of flower buds of zinnias. The result showed that the use of 2 g L-1 of daminozide (T4) reduced the internode length compared to the control group at a rate of 58.60%. In summary, it was concluded that the chemicals and all the doses used in the experiment did not affect the deterioration of the flower quality of zinnias. On the contrary, it was concluded that more compact plants can be obtained by providing height control especially by applying different doses of daminozide. In order to shorten the production period of zinnias, it may be advisable to apply 0.25 ml L-1 of propiconazole.