Relationship Between in Endogenous Phytohormones and Iron Nutrition in Strawberry (Fragaria Vesca Ssp. Semperflorens)

Abstract

The aim of this study was to determine the effects of iron applications on the levels of trans-zeatin riboside (tZR) in the cytokinin group, gibberellic acid (GA3) within the gibberellins, and indole-3-acetic acid (IAA) in the auxin group hormones in strawberry (Fragaria vesca ssp. semperflorens). This study was carried out over 2 years at the Experimental Field of Agricultural Faculty of Van Y & uuml;z & uuml;nc & uuml; Y & imath;l University, Van, T & uuml;rkiye. Ferrichel including 6% Fe was used as the iron source. Four different doses of iron (0, 75, 150, and 225 mg per plot) were applied to the soil in a randomized factorial trial design with three replications in 48 plots as Fe0: 0 mg, Fe1: 4.5 mg, Fe2: 9.0 mg, and Fe3: 13.5 mg Fe per plot. The tZR levels with Fe1 and Fe2 applications decreased and were determined increases with Fe3 application in the 2 trial years. In both trial years, GA3 levels increased compared to control with increasing iron doses. IAA levels also showed increases up to Fe3 doses, while decreasing with Fe3 application. Conversely the highest mean tZR, and GA3 levels were 26.53 mg L-1 and 468.17 mg L-1 in Fe3 application. As a result, tZR, GA3 and IAA levels increased with increasing iron doses. However, increases in IAA continued up to the Fe3 dose, after which a decrease was determined.