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现已证明,小麦大粒型种子较小粒型种子耐辐射。小麦种子的辐射生物学效应在很大程度上与种子的生化成分,特别与干酪蛋白的总氮含量及低分子蛋白集团——谷蛋白有关。因为文献中关于大粒和小粒种子对照射的反应以及控制这个效应的报道很少,我们研究了大小不同的同一品种小麦种子的辐射敏感性与蛋白质含量及蛋白质集团的关系。试验在实验室内进行,用无芒1号小麦种子作材料。用分离筛把种子分成不同千粒重水平的系列。试验采用最小和最大两部分种子。为了均匀照射种子,将种胚向上摆在石英杯中。在不带滤光片的PYM-11X射线装置上进行照射,剂量为0,25,50,75,100和125Gy。照射条件;电流13mA,电压185kV,剂量率为6Gy/min。放射生物学效应按根分生组织染色体畸变细胞的百分率来评价。作出剂量一效应曲线后,确定引起染色体畸变细胞50％的剂
It has been demonstrated that smaller grain seed of wheat large grain seed is resistant to radiation. The radiobiological effects of wheat seeds are largely related to the biochemical composition of the seeds, particularly the total nitrogen content of the casein protein and the low-molecular protein group gluten. Because of the literature on the response of large and small seeds to radiation and few reports on controlling this effect, we investigated the relationship between the radiation sensitivity and the protein content and protein groups of the same variety of wheat seeds of different sizes. The experiment was carried out in the laboratory using the wheat seedless No.1. Separating the seeds into separate series with different grain weight levels. The test uses two parts of the minimum and maximum seeds. To evenly irradiate the seed, place the seed embryo up in the quartz cup. Irradiation was performed on a PYM-11 X-ray device without a filter at doses of 0, 25, 50, 75, 100 and 125 Gy. Irradiation conditions; current 13mA, voltage 185kV, dose rate 6Gy / min. Radiobiology effects were evaluated by the percentage of chromosome aberration cells in root meristem. After making a dose-response curve, identify the agents that cause 50% of chromosomal aberrations