지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.1
- 수록면
- 73 - 80 (8page)
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초록· 키워드
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Pretreatment of chinese cabbage leaves with 100 μM sodium nitroprusside (SNP), a nitric oxide (NO) donor,effectively improved their tolerance to subsequent 2 μMparaquat (PQ)-induced oxidative damage. The fresh weight,and chlorophyll and protein contents in primary leavestreated with PQ alone were noticeably reduced over 24 hlight incubation. However, these leaf injury symptoms weresignificantly alleviated with 100 μM SNP pretreatment for 3h prior to PQ exposure. In additions, the increase of thecontents of malondialdehyde (MDA) and H2O2 due to PQexposure were significantly inhibited by SNP pretreatment.
Together with the protective effects of SNP against PQtoxicity in leaves, the changes of ascorbate-glutathione cycleenzymes activities were examined. In the PQ alone treatment,the activities of APX, DHAR, and GR after 6 h incubationwere rapidly reduced and showed 19%, 50% and 39%respectively, compared with those of the control. However,the decreases in these enzyme activities were significantlyinhibited by SNP pretreatment. As a result, their activitieswere higher than those of PQ alone treatment by 5 times, 2times, and 1.5 times, respectively, at 6 h incubation. Thereafter,these enzymes decrease their activities gradually showinghigh levels than those of PQ alone. Based on the aboveresults, it can be assumed that the activation of ascorbateglutathionecycle by SNP pretreatment in chinese cabbageleaves exposed to PQ can prevent H2O2 accumulation, therebyleading to protection against PQ-induced oxidative stress.
Also, these results indicate that NO acts as an protectantagainst PQ stress in the leaves of chinese cabbage.
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등록된 정보가 없습니다.
참고문헌 (38)
참고문헌 신청
Mittler R / 2002 / Oxidative stress, antioxidants and stress tolerance / Trends Plant Sci 7:405~410
Noctor G / 1998 / Ascorbate and glutathione: keeping active oxygen under control. Annu Rev Plant Physiol / Annu Rev Plant Physiol, Plant Mol Biol 49:249~279
Price AH / 1994 / Oxidative signals in tobacco increase cytosolic calcium / Plant Cell 6:1301~1310
Rao MV / 1996 / Ultraviolet-B-and ozone-induced biochemical changes in antioxidant enzymes of Arabidopsis thaliana / Plant Physiol 110:125~136
Ruan HH / 2005 / Effects of exogenous NO donor on glutathione-dependent antioxidative system in wheat seedling leaf under salt stress / Acta Agron 31:1144~1149
Noctor G / 1998 / Ascorbate and glutathione: keeping active oxygen under control. Annu Rev Plant Physiol / Annu Rev Plant Physiol, Plant Mol Biol 49:249~279
Price AH / 1994 / Oxidative signals in tobacco increase cytosolic calcium / Plant Cell 6:1301~1310
Rao MV / 1996 / Ultraviolet-B-and ozone-induced biochemical changes in antioxidant enzymes of Arabidopsis thaliana / Plant Physiol 110:125~136
Ruan HH / 2005 / Effects of exogenous NO donor on glutathione-dependent antioxidative system in wheat seedling leaf under salt stress / Acta Agron 31:1144~1149
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