A Study for Determining Endogenous Plant Growth Regulation Substances Changes During Stratification in Apple (Malus domestica Borkh.) Seeds

Abstract: this study was carried out in erzurum (atatürk university, agriculture faculty, department of horticulture) between 2009 and 2011 years. the aim of the study was to determine the relationship between the endogenous plant growth regulation substances during the stratification in the dormant seeds of apple. changes of the endogenous plant growth regulation substances were determined by using oat coleoptil tests.the results showed that growth inhibitors decreased periodically during stratification. it was also found that growth promoters significantly increased towards the last weeks of stratification. in the study, while growth promoters were found in the sections of rf 0,2–0,3 and rf 0,8–1,0, growth inhibitors were found in the sections of rf 0,4–0,7 in the oat coloeoptil tests