Abstract: Physiological process of germinating Crambe seeds was significantly influenced by the treatment of different concentration and dose of EMS ⁶⁰Co. Low-level of them could stimulate the respiration and raise the activities of ascorbic acid oxidase and peroxidase which associated with higher rate of seed germination and growth of seedling. High-level had inhibiting effects on respiration and the activities of related enzymes, the germinating potential of seed and the rate of germination and the vigor of root system decreased. The yield per plant and the resistance to disease of M₁ generation of Crmbe abyssinica were also influenced by the treatment of different concentration and dose of EMS ⁶⁰Co.

Key words: MES, ⁶⁰Co, Crambe abyssinica, Seed germination, Agronomic character