THE ULTRASTRUCTURAL STUDY ON THE EARLY DEVELOPMENT OF ENDOSPERM OF NITRARIA SIBIRICA THE ELECTRON MICROSCOPE OBSERVATIONS ON THE STRUCTURE AND FUNCTION OF THE NUCELLUS IN NITRARIA SIBIRICA PALL. Studies on the Development of the Embryo and Endosperm of Nitraria sibirica Pall Differences of Cynomorium songaricum seed quality and mutual parasitism in different host plants Isolation and characterization of Nitraria sibirica actin gene Effect of Exogenous Spermidine on Antioxidant Enzyme System in Leaves of Nitraria sibirica Pall.Seedlings under Salt Stress Multiple Shoots Induction and Rapid Propagation of Nitraria sibirica Multiple Shoots Induction and Rapid Propagation of Nitraria sibirica