IntroductionPhytohormones play a crucial role in regulating the abscission of plant organs and tissues. MethodsIn this study. the ultrastructure of the sepals of Korla fragrant pears was observed using a transmission electron microscope. and high-performance liquid and gas chromatography were used to analyze the dynamic changes of phytohormones in the abscission zone during the calyx ... https://www.parisnaturalfoodes.shop/product-category/choline/