Stimulated Repopulation as a Basis of Antimutagenesis and the Adaptive Response in Plants

Stimulated Repopulation as a Basis of Antimutagenesis and the Adaptive Response in Plants Wheat seeds were used to study (1) modification of the radiation adaptive response (AR) with antioxidant anphen and (2) modification of the clustogenic effect of N-nitroso-N-methylurea (NMU) with various agents. Pretreatment with anphen enhanced AR. Each pretreatment (irradiation with 0.25 Gy, treatment with anphen, treatment with anphen followed by irradiation with 0.25 Gy) decreased aberration frequency. This parameter proved to be in a linear dependence with mitotic index (MI) with correlation coefficient –0.978; the regression line passed through the point corresponding to spontaneous MI and spontaneous aberration frequency. Upon treatment with NMU, the antimutagenic effect was observed for various pretreatments (a low concentration of NMU, antioxidant phenoxan, irradiation with 0.25 Gy). Again, MI and aberration frequency were in inverse proportion with correlation coefficient –0.99, and the regression line passed through the point with spontaneous MI and spontaneous aberration frequency. The same dependence was observed for previously published data on modification of radiation AR with phenoxan. The results were hard to explain in terms of the repair-associated mechanism of AR and the antimutagenic effect. Hence, a nonspecific inducible process of stimulated repopulation was assumed to be a common mechanism of AR and the antimutagenic effect in plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Stimulated Repopulation as a Basis of Antimutagenesis and the Adaptive Response in Plants

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Biomedicine; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1023/A:1014850617445
Publisher site
See Article on Publisher Site

Abstract

Wheat seeds were used to study (1) modification of the radiation adaptive response (AR) with antioxidant anphen and (2) modification of the clustogenic effect of N-nitroso-N-methylurea (NMU) with various agents. Pretreatment with anphen enhanced AR. Each pretreatment (irradiation with 0.25 Gy, treatment with anphen, treatment with anphen followed by irradiation with 0.25 Gy) decreased aberration frequency. This parameter proved to be in a linear dependence with mitotic index (MI) with correlation coefficient –0.978; the regression line passed through the point corresponding to spontaneous MI and spontaneous aberration frequency. Upon treatment with NMU, the antimutagenic effect was observed for various pretreatments (a low concentration of NMU, antioxidant phenoxan, irradiation with 0.25 Gy). Again, MI and aberration frequency were in inverse proportion with correlation coefficient –0.99, and the regression line passed through the point with spontaneous MI and spontaneous aberration frequency. The same dependence was observed for previously published data on modification of radiation AR with phenoxan. The results were hard to explain in terms of the repair-associated mechanism of AR and the antimutagenic effect. Hence, a nonspecific inducible process of stimulated repopulation was assumed to be a common mechanism of AR and the antimutagenic effect in plants.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Oct 13, 2004

References

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