Cell radiosensitivity variation in synchronously-dividing root meristems of Pisum sativum L. and Zea mays L. during the mitotic cycle

The cell divisions in pea and maize seedling root meristems were synchronized by treatment with 0.03 per cent hydroxyurea for 24 hours. At different times after block cessation (removing seedlings from hydroxyurea), i.e. according to certain phases and subphases of the mitotic cycle, the seedlings w...

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Bibliographic Details
Published inInternational journal of radiation biology and related studies in physics, chemistry and medicine Vol. 41; no. 4; p. 401
Main Authors Gudkov, I N, Grodzinsky, D M
Format Journal Article
LanguageEnglish
Published England 01.01.1982
Subjects
Cell Division - drug effects
Cell Division - radiation effects
Cobalt Radioisotopes
Dose-Response Relationship, Radiation
Gamma Rays
Hydroxyurea - pharmacology
Mitosis - radiation effects
Plants - radiation effects
Radiation Tolerance
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Summary:The cell divisions in pea and maize seedling root meristems were synchronized by treatment with 0.03 per cent hydroxyurea for 24 hours. At different times after block cessation (removing seedlings from hydroxyurea), i.e. according to certain phases and subphases of the mitotic cycle, the seedlings were treated with 60Co gamma-radiation at doses from 3 to 32 Gy. Evaluation of seedling radioresistance by the survival of the main root meristem on the tenth day after irradiation led to the following sequence of cell stages in order of increasing resistance. For the pea root meristem: G2, M, late G1, early S, late S, middle S and early G1. For the maize root meristem: late G2, M, G1, early S, early G2, late S and middle S.
ISSN:0020-7616
DOI:10.1080/09553008214550441