Soaking seeds of Arabidopsis in 0.005% streptomycin (SM) produced no second generation chlorophyll mutants. But when seeds were soaked in 0.005% SM for 20 hours before irradiation with X-ray, the percentage of chlorophyll mutants was lower than in plants obtained from seeds that were soaked in distilled water before exposure to X-ray. This protective action of SM was antagonized by 0.01 M Mncl2. It is suggested that this change in the radiosensitivity of Arabdopsis by SM is caused by chelation of Mn++ with SM, thus causing a deficiency of the Mn++ ion, which is essential for the integrity of the chromosomes.
Proceedings of the Iowa Academy of Science
©1969 Iowa Academy of Science, Inc.
Dhar, Sujit K.
"Genetic Effects of X-ray in Combination with Streptomycin on Arabidopsis thaliana I,"
Proceedings of the Iowa Academy of Science, 76(1), 69-73.
Available at: https://scholarworks.uni.edu/pias/vol76/iss1/10