Determining of the effects of paclobutrazol treatments on seedling height control of wild Gypsophila bicolor (Freyn & Sint.) Grossh

Fazilet PARLAKOVA KARAGOZ; Atilla DURSUN; Muhammed Melih KOTAN

doi:10.15835/nbha51212913

Authors

Fazilet PARLAKOVA KARAGOZ Atatürk University, Faculty of Agriculture, Department of Horticulture, TR-25240 Erzurum (TR) https://orcid.org/0000-0001-7417-1716
Atilla DURSUN Atatürk University, Faculty of Agriculture, Department of Horticulture, TR-25240 Erzurum; Kyrgyzstan -Turkey Manas University, Faculty of Agriculture, Department Horticulture and Agronomy, Bishkek (TR)
Muhammed Melih KOTAN Atatürk University, Faculty of Agriculture, Department of Horticulture, TR-25240 Erzurum (TR)

DOI:

https://doi.org/10.15835/nbha51212913

Keywords:

compact, Gypsophila bicolor, PBZ, plant height control breeding, potted ornamental plant, wild species

Abstract

Within the scope of this study, seeds were collected from Gypsophila bicolor (Freyn&Sint.) Grossh plants in their natural environment and two different locations (Turkey). The research was carried out to determine the effects of paclobutrazol applied at different concentrations (0.6, 0.9, 1.2, 1.5- and 2.0-ml L^-1) on the seedling height control in the cotyledon leaf stage of G. bicolor. As a result of the study, it was determined that the decrease in the number of leaves per plant was determined at a dose of 1.2 mg L^-1 paclobutrazol. The effect of paclobutrazol treatments on the seedling height control of G. bicolor changed according to the genotype as well as the dose. As the dose of paclobutrazol applied increased, the number of side branches decreased. It was determined that the seedling stem thickness increased in 47.71% with the dose of 2.0 mg L^-1 when compared to the control treatment. The application in which the highest chlorophyll (SPAD) value was obtained from the application with a dose of 1.5 mg L^-1. The chlorophyll value of G2 (Genotype 2 (ERZ) (G2)) was higher than that of G1 (Genotype 1 (VAN)). Seedling biomass of G1 increased in 15.87% in 1.2 mg L^-1 treatment when compared to control. In the present study, darker green leaves were obtained from the highest dose of paclobutrazol, 2.0 mg L^-1. As a general result, it was concluded that 1.5 mg L^-1 dose of paclobutrazol was sufficient for both genotypes for plant height control in the seedling period.

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