| 高能重离子辐射对水稻的生物学效应 |
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| 引用本文： | 梅曼彤,刘振声.高能重离子辐射对水稻的生物学效应[J].作物学报,1995,21(3):307-314. |
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| 作者姓名： | 梅曼彤 刘振声 |
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| 作者单位： | 华南农业大学，广东广州，510642 |
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| 基金项目： | 国家自然科学基金，高等学校博士专业点专项研究基金资助项目，美国洛克菲勒基金会提供资助 |
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| 摘 要： | 本文观察了数种高能重离子辐射处理水稻干种子的生物学效应，结果表明；与具低传能线密度的＾Ｃｏ６０－γ射线相比，这些具高ＬＥＴ的重离子能更有效地抑制受照射种子萌发生出的幼苗的生长，诱导根尖细胞和花粉母细胞的染色体畸变和微核形成，降低当代植株的结实率，并发后代出现形态性状及农艺性状的变异，在一定剂量范围内，辐射诱导的上述数种生物学效应与吸收剂量间呈线性关系，根据剂一－效应关系曲线，估算了重离子辐射的上述
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| 关 键 词： | 高能重离子辐射 水稻 生物学效应 |
| 收稿时间： | 1993-09-24 |
Biological Effects of Heavy Ion Radiation in Rice |
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| Mei Mantong,Deng Hong,Lu Yonggen Zhuang Cuxiong Qiu Yunlan,Zuo Qingfan.Biological Effects of Heavy Ion Radiation in Rice[J].Acta Agronomica Sinica,1995,21(3):307-314. |
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| Authors: | Mei Mantong Deng Hong Lu Yonggen Zhuang Cuxiong Qiu Yunlan Zuo Qingfan |
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| Institution: | South China Agricultural University, Grangzhou,510642 |
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| Abstract: | Genetic and developmental effects of heavy ions in rice were investigated. Heavy particles with various charges and energies were accelerated at the BEVELAC, Lawrence Berkeley Laboratory, USA. The effectiveness of high-LET heavy ion in (1) inhibiting seedling growth, (2) reducing plant fertility, (3) inducing chromosome aberration and micronuclei in root tip and pollen mother cells of the first generation plants developed from exposed seeds, and (4) inducing mutation in the second generation, were greater than that of low-LET gamma rays. All effects observed were dose-dependent; however, an optimal range of doses existed for inducing certain types of mutation, For example, for argon ions (400 MeV/u) treatment at 90-100 Gy, several valuable mutant lines with favorable characters, such as semidwarf, early maturity and high yield ability, were obtained. Experimental results suggest that the potential application of heavy ions in crop improvement is promising. RFLP analysis of two semidwarf mutants induced by argon particles revealed that large DNA alterations might be involved in these mutants. |
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| Keywords: | High energy heavy ion radiation Rice Biological effects |
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