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本实验观察了大剂量Co~(60)γ射线对海带多细胞雌、雄配子体的致死影响。 从实验的观察和对实验所得的材料分析,可以得出以下几点初步结论: (1)12万伦的Co~(60)γ射线没有立即引起配子体在射线下死亡,而仅仅少数个体的个别细胞,色素体开始有微小的变化。受照射各组配子体的死亡均发生在照射后第2天。 (2)海带多细胞雌配子体对辐射的抗性,要比海带单细胞雌配子体强。因为单细胞雌配子体在30天里的致死X射线剂量是6,000伦左右,但是12万伦的Co~(60)γ射线却不能在30天里使多细胞配子体全部死亡。 (3)海带雄配子体要比多细胞雌配子体对辐射敏感。因为受12万伦Co~(60)γ射线照射,在照射后经过12天,雄配子体已经全部死亡,但雌配子体却仅死亡60％。雄配子体对辐射的敏感性大于雌配子体。 (4)受大剂量γ射线照射后的海带配子体,不仅仅引起许多配子体的死亡,而且还严重地影响配子体的进一步发育。这表现在:受照射各组合子和孢子体的形成很少;孢子体细胞分裂不规则等等。并且大多数的合子和几乎全部的幼孢子体均相继发生死亡。 (5)受照射组的配子体细胞、合子和幼孢子体细胞的死亡过程相似。
In this experiment, we observed the lethal effect of high dose Co ~ (60) γ rays on the multi-cell female and male gametophytes of kelp. From the experimental observations and material analysis of the experiment, we can draw the following preliminary conclusions: (1) 12 Wan Lun Co ~ (60) γ rays do not immediately cause the gametophyte to die under the ray, and only a few individuals Cells, pigment body began to have small changes. The death of gametophytes in each group occurred on the second day after irradiation. (2) The kelp multi-cell female gametophyte is more resistant to radiation than the kelp single-cell female gametophyte. Because single-cell female gametophyte lethal X-ray doses are around 6,000 lunas in 30 days, 120,000 Lun Co 60 gamma does not kill all of the multi-cell gametophytes in 30 days. (3) The kainate male gametophyte is more radiation-sensitive than the multicellular female gametophyte. Because 12 million Lun Co ~ (60) γ-ray irradiation, after 12 days of irradiation, the male gametub had all died, but the female gametophy only 60% of deaths. Male gametocytes are more susceptible to radiation than female gametophytes. (4) Ligand gametophytes irradiated by high dose of γ-rays not only caused the death of many gametophytes, but also seriously affected the further development of gametophytes. This is manifested in: the irradiation of the various combinations of spores and the formation of sporozoites; irregular sporophytic cell division and so on. And most of the zygotes and almost all of the sporozoites died in succession. (5) The irradiated groups of gametocytes somatic cells, zygotes and juvenile sporozoites somatic cell death process is similar.