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한국생태학회 / v.30, no.3, 2007년, pp.257-264 
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( Over-expression of Cu/ZnSOD Increases Cadmium Tolerance in Arabidopsis thaliana ) |
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| 초 록 |
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| Over-expression of a copper/zinc superoxide dismutase (Cu/ZnSOD) resulted in substantially increased tolerance to cadmium exposure in Arabidopsis thaliana. Lower lipid peroxidation and $H_2O_2$ accumulation and the higher activities of $H_2O_2$ scavenging enzymes, including catalase (CAT) and ascorbate peroxidase (APX) in transformants (CuZnSOD-tr) compared to untransformed controls (wt) indicated that oxidative stress was the key factor in cadmium tolerance. Although progressive reductions in the dark-adapted photochemical efficiency (Fv/Fm) and quantum efficiency yield were observed with increasing cadmium levels, the chlorophyll fluorescence parameters were less marked in CuZnSOD-tr than in wi. These observations indicate that oxidative stress in the photosynthetic apparatus is a principal cause of Cd-induced phytotoxicity, and that Cu/ZnSOD plays a critical role in protection against Cd-induced oxidative stress. |
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| 키워드 |
| Arabidopsis;Cadmium tolerance;Oxidative stress;Superoxide dismutase; |
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Journal of Ecology and Field Biology / v.30, no.3, 2007년, pp.257-264
한국생태학회
ISSN : 1975-020X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200735836630536)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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