Activity of antioxidant system is associated with different damages on rice seeds and seedlings after low dose heavy ion exposure
Dry seeds, water-soaked seeds and seedlings of rice were exposed to carbon ion radiation at doses of 0.02-20 Gy. Biological effects on survival, chromosomal aberrations and activity of protective enzymes against activated oxygen including superoxide dismutase (SOD) and catalase (CAT) as well as content of malondialdehyde (MDA) were detected. Oxidative damages were observed in both seeds and seedlings at dose as low as 0.02 Gy. Higher level of chromosomal damages and MDA were observed in seeds than in seedlings at doses lower than 2 Gy. The activity of SOD and CAT were significantly increased in seedlings at lower dose and decreased at higher dose. These results indicate that lower ability of antioxidant make nongrowing seeds more sensitive to heavy ion induced damages than growing seedlings at low dose.
Ye-Qing SUN Jin-Ming SHI Meng ZHANG Ye-Qing SUN Wen-Jian Li
Department of Life Science and Engineering, Harbin Institute of Technology HIT Harbin, China Institute of Environmental Systems Biology, Dalian Maritime University DLMU Dalian, China Institute of Modern Physics, Chinese Academy of Sciences CAS Lanzhou, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）