The Effect of Oxygen Concentration on the Dose-Action Survival Curves Obtained for Habrobracon Eggs Irradiated during Meiotic Prophase and Metaphase

Publisher Website
Google Scholar
Abstract
Studies of total embryo lethals induced in 4570 eggs X-rayed in N, air, and O2 during meiotic metaphase with doses ranging from 396r to 2450r were made. The N series differed very significantly from the air and O2 series with a maximum difference of 48.5% at one dose. Similar studies were made of 4846 prophase eggs X-rayed in N, air, and O2 with doses ranging from 2100r to 44,100r. Again the nitrogen series differed significantly from the air and O2 series with the maximum differences reaching 52.0% at one dose. The oxygen effect appears to be of the same magnitude in metaphase and prophase eggs despite a considerable difference in the X-ray dose necessary to induce lethality in each of these two stages. This similarity is believed by the author to support the initial damage hypothesis of O2 action.