Dose response of prematurely condensed chromosome rings after gamma irradiation

Corn tassels were irradiated using Co 60 gamma rays at dose levels from 250 to 20,000 r. Twenty-four and forty-eight hours after irradiation the pollen was collected from the tassels and used to fertilize ears. The quantity of good seeds per ear, the germination percentage of these good seeds, and the seedling height 7 and 14 days later of the plants from these germinated seeds were recorded. No seeds were obtained beyond 4,000 r. There was little effect from pollen used 24 hours after treatment compared ivith pollen used 48 hours after treatment for any of the characters measured. There was a general dose response for number of good seeds per ear, and also in the percentage of germination of those seeds classified as good. The higher doses reduced both numbers of good seeds and their germination. There was no evident dose response of seedling height, if the seed did germinate it grew about as well as any at the dose levels measured.

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Reticulocyte and micronucleated reticulocyte responses to gamma irradiation: dose–response and time-course profiles measured by flow cytometry

Mutation Research/Genetic Toxicology and Environmental Mutagenesis ◽

10.1016/j.mrgentox.2007.06.010 ◽

2007 ◽

Vol 634 (1-2) ◽

pp. 119-125 ◽

Cited By ~ 24

Author(s):

Stephen D. Dertinger ◽

Ying Tsai ◽

Irena Nowak ◽

Ollivier Hyrien ◽

Hongliang Sun ◽

...

Keyword(s):

Flow Cytometry ◽

Gamma Irradiation ◽

Dose Response ◽

Irradiation Dose ◽

Time Course

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Quantitative dose-response of Prunus fruit decay fungi to gamma irradiation

Radiation Botany ◽

10.1016/s0033-7560(64)80079-x ◽

1964 ◽

Vol 4 (3) ◽

pp. 309-316 ◽

Cited By ~ 16

Author(s):

N.F. Sommer ◽

E.C. Maxie ◽

R.J. Fortlage

Keyword(s):

Gamma Irradiation ◽

Dose Response ◽

Decay Fungi ◽

Fruit Decay

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Dose response of polyvinyl alcohol films dyed by methyl red under gamma irradiation

International Journal of Low Radiation ◽

10.1504/ijlr.2009.028886 ◽

2009 ◽

Vol 6 (3) ◽

pp. 177 ◽

Cited By ~ 3

Author(s):

Nguyen Trieu Tu ◽

Nguyen Van Dung ◽

Tran Dai Nghiep

Keyword(s):

Polyvinyl Alcohol ◽

Gamma Irradiation ◽

Dose Response ◽

Methyl Red ◽

Polyvinyl Alcohol Films

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Linear Dose Response of Acrocentric Chromosome Associations (Aca) To Gamma Irradiation In Human Lymphocytes

10.21203/rs.3.rs-1116997/v1 ◽

2021 ◽

Author(s):

Ravindra M Samarth ◽

Puneet Gandhi ◽

Nabo Kumar Chaudhury

Keyword(s):

Gamma Irradiation ◽

Dose Response ◽

Acrocentric Chromosome ◽

Linear Trend ◽

Human Lymphocytes ◽

Regression Equation ◽

Dicentric Chromosomes ◽

Healthy Donors ◽

Chromosome Associations ◽

Dose Dependent Increase

Abstract Purpose: The frequency of acrocentric chromosome associations (ACA) was studied to determine the possible dose-response relation with low doses of gamma irradiation in lymphocytes. Methods: Peripheral blood collected from three healthy donors were irradiated with 0, 0.1, 0.25, 0.5, 0.75, and 1 Gy gamma radiation. Chromosomal preparations were made after 48 hrs culture as per the standard guidelines. Results: The average number of ACA and ACA % were increased significantly with an increase in a dose. The D-G and D-D type of association was most prominent and showed a dose-dependent increase. The ACA frequency in irradiated lymphocytes showed an increase concerning the dose. The fitted regression equation was y=0.4759x+0.1663 (R2=0.9635; p=0.0005). An assessment of dicentric chromosomes (DC) was carried for the same slides. The correlation curve was prepared for ACA frequencies versus DC frequencies, resulting in a regression equation as y=8.659x+0.2.37 (R2=0.8275; p=0.0119). Conclusion: Our results showed an increase in frequencies of ACA in irradiated lymphocytes with an increase in radiation dose and followed a similar linear trend with DC frequency, thus, ACA may serve as a candidate cytogenetic biomarker for radiation biodosimetry especially for low radiation doses.

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