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자료유형
학술저널
저자정보
Teranishi, Mika (Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University) Hidema, Jun (Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University) Fujino, Takana (Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University) Hirouchi, Tokuhisa (Department of Biomolecular Sciences, Graduate School of Life Sciences, Tohoku University) Yamamoto, Kazuo (Department of Biomolecular Sciences, Graduate School of Life Sciences, Tohoku University) Kumagai, Tadashi (Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University)
저널정보
한국광과학회 Journal of photoscience : an international journal officail organ of the korean society of photoscience Journal of photoscience : an international journal officail organ of the korean society of photoscience 제9권 제2호
발행연도
2002.1
수록면
329 - 331 (3page)

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There is a difference in the inhibitory effects to supplemental UVB (wavelengths 280 to 320 nm) among Japanese rice (Oryza sativa L.), the cultivar Norin I is less resistant while the cultivar Sasanishiki is resistant. UVB induces photodamage in DNA. Cyclobutane pyrimidine dimer (CPD) is a major UV-induced DNA lesion. Photorepair, which is mediated by photolyase, is the major pathway in plants for repairing CPD. We have analyzed CPD induction and repair in Sasanishiki and its close relative Norin I using alkaline agarose gel electrophoresis. Norin I is deficient in CPD photoreactivation and excision, thus UV sensitivity correlates with deficient dimer repair [I]. The photorepair deficiency in Norin I results from a functionally altered photolyase with a photoflash analysis [2]. In this paper, we examined the UVB-sensitivity of several other UV-sensitive and -resistant cultivars and found that the CPD photolyase activity was deficient in UV-sensitive ones. It was also evident that there was a variation in the deduced amino acid sequences of CPD photolyases of the UV-sensitive and -resistant cultivars, whereas each deduced amino acid sequence of the UV-sensitive cultivars and of the UV-resistant ones was the same. These results suggest that the difference in the CPD photolyases of UV-sensitive and -resistant rice might be due to the structural alteration of CPD photolyase.

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