Document Detail


Gamma radiation effects on seed germination, growth and pigment content, and ESR study of induced free radicals in maize (Zea mays).
MedLine Citation:
PMID:  23996407     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of gamma radiation are investigated by studying plant germination, growth and development, and biochemical characteristics of maize. Maize dry seeds are exposed to a gamma source at doses ranging from 0.1 to 1 kGy. Our results show that the germination potential, expressed through the final germination percentage and the germination index, as well as the physiological parameters of maize seedlings (root and shoot lengths) decreased by increasing the irradiation dose. Moreover, plants derived from seeds exposed at higher doses (≤0.5 kGy) did not survive more than 10 days. Biochemical differences based on photosynthetic pigment (chlorophyll a, chlorophyll b, carotenoids) content revealed an inversely proportional relationship to doses of exposure. Furthermore, the concentration of chlorophyll a was higher than chlorophyll b in both irradiated and non-irradiated seedlings. Electron spin resonance spectroscopy used to evaluate the amount of free radicals induced by gamma ray treatment demonstrates that the relative concentration of radiation-induced free radicals depends linearly on the absorbed doses.
Authors:
Delia Marcu; Grigore Damian; Constantin Cosma; Victoria Cristea
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Publication Detail:
Type:  Journal Article     Date:  2013-06-09
Journal Detail:
Title:  Journal of biological physics     Volume:  39     ISSN:  1573-0689     ISO Abbreviation:  J Biol Phys     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-09-02     Completed Date:  2014-07-03     Revised Date:  2014-09-02    
Medline Journal Info:
Nlm Unique ID:  0417731     Medline TA:  J Biol Phys     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  625-34     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Electron Spin Resonance Spectroscopy
Free Radicals / metabolism*
Gamma Rays*
Germination / radiation effects*
Photosynthesis / radiation effects
Pigments, Biological / metabolism*
Radiation Tolerance
Seeds / growth & development*,  radiation effects*
Zea mays / growth & development,  metabolism,  radiation effects*
Chemical
Reg. No./Substance:
0/Free Radicals; 0/Pigments, Biological
Comments/Corrections

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