摘要
电镜观察表明：受０．０２、０．０５或０．３ｋＧｙγ射线辐照大蒜的生长点细胞的超微结构受到不同程度的损伤，生长点细胞变长，细胞壁增厚。超微结构中液胞对辐照敏感性最强，核仁和线粒体最抗辐照，在细胞壁受损破裂情况下，仍保持基本完整，萌动期的结构损伤较休眠期显著，说明通过代谢活动，使辐照损伤进一步扩大，因此细胞分裂受阻，抑制了大蒜的发芽。
Irradiation with doses of 0.02--0.3 key of brays could causevaried damages to the cellular and subcellular structures of the shoot apical meristemsin garic. The irradiated cells were elongated and cell walls were thickened.The highestradio-sensitivity was found in the-- vacuoles. which developed morphological abnormality before the .end. of dormany. While the nucleis f.and nucleon, which remained intact even after the cell walls were broken, demonstrated the highest resistance toirradiation, --The obseryed morphological damages Were of higher magnitude in sproutingperiod than that in dormancy in which irradiation treatments were conducted,suggesting that metabolism plays an important role in --the development of initialirradiation lesions into structural damages in the cells,
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
北大核心
1994年第1期44-46,51,共4页
Journal of Radiation Research and Radiation Processing
基金
国家自然科学基金
