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Effects of Low Dose Gamma-irradiation on Alleviation of Salt Stress in Rice (Oryza sativa L.) Seedling
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 Title & Authors
Effects of Low Dose Gamma-irradiation on Alleviation of Salt Stress in Rice (Oryza sativa L.) Seedling
Baek, Myung-Hwa; Kim, Jin-Hong; Wi, Seung-Gon; Lee, In-Jung; Lee, Kyu-Seong; Kim, Jae-Sung;
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 Abstract
To investigate alleviation effects of salt stress by low dose gamma-irradiation on seedling growth of rice (Oryza shrive L), in plants of two rice cultivars (Ilpumbyeo and Gancheokbyeo), seeds were irradiated with the different doses of gamma-ray by irradiator (, ca.150 TBq of capacity, AECL). The salt stress caused a remarkable decrease of seedling growth, particularly for dry weight. In addition, relative growth rate was decreased over 50% by the salt stress. However, the salt stress-induced inhibition of growth was alleviated by gamma-irradiation. Especially, the relative growth rate of shoot showed the reduction effect over 30% at 4 Gy-irradiated groups as compared with that of control. Also, electrolyte leakage and relative water content were damaged, respectively 4 times and 30% by the salt stress but the damages were alleviated by the gamma-irradiation. These alleviation effects were observed similarly in both the cultivars tested. These results suggest that the low dose gamma-irradiation may have a better protection or the salt stress.
 Keywords
Alleviation effects;low dose gamma-irradiation;salt stress;seedling growth;electrolyte leakage;relative water content;
 Language
Korean
 Cited by
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