The Levels of Abscisic Acid (ABA) in the Testa and Embryos of Sunflower (Helianthus annuus L.)

Authors: Ş. Fatih TOPCUOĞLU

Abstract: The levels of endogenous free, bound and total abscisic (ABA) were assessed in the testa (seed coat) and embryos of sunflower (Helianthus annuus L. cv. Peredovik). For determination of the levels of ABA, the gas-liquid chromatography technique was used. The contents of free ABA were found to be higher than those of the bound ABA in the testa and embryos. The contents of free and bound ABA in the testa were observed to be at significantly higher values when compared with those of the embryos.

Keywords: Sunflower, Testa, Embryo, Abscisic Acid