Effects of absorbed radioactive sulfur (S35) in plant cell. I. Mitotic chromosome aberrations in rye seedling induced by the treatment of S35 solution

식물에 미치는 방사성 동위원소 S35의 영향에 대하여 (제1보) 호밀 근단세포의 염색체 이상수발에 관한 연구

Beta-ray irradiation effects on structural changes of the chromosomes in root tip of rye, Secale cereale L., seedlings, particularly the frequency of chromosome bridge induction at anaphase stage treated with radioactive sulfur (S35) solutions were studied in this experiment. Among the four different concentrations of isotope solution, the lowest one, 0.4$\mu$c solution, has shown weak effect on the induction of chromosome aberration. On the other hand, higher concentration, 25.6$\mu$c solution, induced higher frequency of chromosome bridge induction as much as 4.3%. Concerning the relationship between the ages of after treatment and the ranges of concentration, the higher concentrations showed more pronounced effects than the lower ones.