Biological effects of protons irradiation on rice

Dry seeds of rice were irradiated by 4∼8 MeV protons with various doses. The biological effect in M1 was studied. The results show that protons were able to induce variation on chromosome structure in root tip cells. The rate of cells with chromosome aberration was increased with protons energy and dose added. The energy effects of protons were higher than dose effect; energy effects were showed between 8 MeV and 4,6 MeV. As compared with γ-rays, the effects of protons were the same on chromosomal aberration and mitotic inhibition but higher on rate of cell with micronucleus and lower on rate of chromosomal bridge. The radiosensitivities of three rice varieties were various with different radio-sources and references