EFFECTS OF X-RAYS ON CHROMOSOMES OF LILIUM LONGIFLORUM DURING MEIOSIS
نویسندگان
چکیده
منابع مشابه
Effects of X-Rays on Chromosomes of Lilium Longiflorum during Meiosis.
TUDIES of the types of aberrations induced in chromosomes by irradiation S during the meiotic prophase have been infrequent. The complications introduced by synapsis and crossing over make the analysis much more difficult than is the case for mitotic divisions on which most of the work has been concentrated. However, in the assessment of radiation damage to genetic material, the differential se...
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The events that accompany female meiosis in Lilium parallel almost exactly those characteristic of male cells. The megaspore mother-cell is first cut off from investing tissue by a callosic wall, and this isolated cytoplasm undergoes a phase of comprehensive dedifferentiation. Not only does the major part of the ribosome population appear to be removed from both the cytoplasm and plastids, but ...
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1. Pollen mother cells exposed to low dosages of x-rays at various stages show different frequencies of chromosome abnormalities in the first meiotic anaphase. 2. Maximum frequencies of abnormalities were obtained in buds irradiated in the pachytene stage of the meiotic prophase and in the preceding mitosis. 3. These results are taken to indicate that the x-ray-sensitive portions of the chromon...
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in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
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ژورنال
عنوان ژورنال: Genetics
سال: 1958
ISSN: 1943-2631
DOI: 10.1093/genetics/43.5.771