Autotoxic Effect of Cultured Seedlings of Paeonia ostii T. Embryo Variation and Vitality of Seed Embryos from Tetraploid Robinia pseudoacacia Influence on Wheat Seed Embryo Proteins During the Germination Period by Changed NaCl Stress Analysis of Embryo, Endosperm, Cytoplasmic and Maternal Effects for Amylose Cont ent Trait in Indica Rice Effects of Straw-Returning Instead of Chemical Potassium Application on Oil Accumulation in Cottonseed Embryo in Wheat-Cotton Rotation System EFFECT OF UNSCHEDULED DNA SYNTHESTS IN SEED EMBRYOS OF WHEAT INJECTED AND PENETRATED BY N~(7+) HEAVY ION