Biological Effect of Gamma Rays According to Exposure Time on Germination and Plant Growth in Wheat
Source abstract
Abstract
Gamma rays as a type of ionizing radiation constitute a physical mutagen that induces mutations and could be effectively used in plant breeding. To compare the effects of gamma and ionizing irradiation according to exposure time in common wheat (Keumgang, IT 213100), seeds were exposed to 60Co gamma rays at different dose rates. To evaluate the amount of free radical content, we used electron spin resonance spectroscopy. Significantly more free radicals were generated in the case of long-term compared with short-term gamma-ray exposure at the same dose of radiation. Under short-term exposure, shoot and root lengths were slightly reduced compared with those of the controls, whereas long-term exposure caused severe growth inhibition. The expression of antioxidant-related and DNA-repair-related genes was significantly decreased under long-term gamma-ray exposure. Long-term exposure caused higher radiosensitivity than short-term exposure. The results of this study could help plant breeders select an effective mutagenic induction dose rate in wheat.
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Research context
OpenAlex topics: Plant Genetic and Mutation Studies · Plant tissue culture and regeneration · Seed Germination and Physiology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu, Jeongeup 56212, Korea
Institute of Animal Molecular Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea
Division of Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea
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