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Trends of superoxide dismutase.and Soluble Protein of Aquatic Plants in Lakes of Different Trophic Levels in the Middle and Lower Reaches of the Yangtze River, China

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Journal of Integrative Plant Biology 2009年第4期51卷 414-422页

作者： Ai-Ping Wu Te Cao Shi-Kai Wu Le-Yi Ni Ping Xie Donghu Experimental Station of Lake Ecosystems The State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology the Chinese Academy of Sciences Wuhan 430072 China Ecology Department College of Bioscience and Biotechnology Hunan Agricultural University Changsha 410128 China Graduate University of the Wuhan Branch Chinese Academy of Sciences Wuhan 430072 China

A limnological study was carried out to determine the responses of superoxide dismutase.（SOD） activities and soluble protein （SP） contents of 11 common aquatic plants to eutrophication stress. Field investigation in 12 lakes in the middle and lower reaches of the Yangtze River was carried out from March to September 2004. Our results indicated that non- submersed （emergent and floating-leafed） plants and submersed plants showed different responses to eutrophication stress. Both SOD activities of the non-submersed and submersed plants were negatively correlated with their SP contents （P 〈 0.000 1）. SP contents of non-submersed plants were significantly correlated with all nitrogen variables in the water （P 〈 0.05）, whereas SP contents of submersed plants were only significantly correlated with carbon variables as well as ammonium and Secchi depth （SD） in water （P 〈 0.05）. Only SOD activities of submersed plants were decreased with decline of SD in water （P 〈 0.001）. Our results indicate that the decline of SOD activities of submersed plants were mainly caused by light limitation, this showed a coincidence with the decline of macrophytes in eutrophic lakes, which might imply that the antioxidant system of the submersed plants were impaired under eutrophication stress.

关键词： eutrophication macrophytes soluble protein superoxide dismutase.

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Studies on metabolic extract of Altemaria alternata and toxicity

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Journal of Environmental Sciences 1991年第4期3卷 29-34页

作者： Tang Jiajun (Tang Chiachun) and Hu XintongResearch Center for Eco-environmental Sciences.Chinese Academy of Scienbces.Beijing 100083,China.

Altemaria alternata were isolated from wheat seeds collected from villages in Tianshui area of Gansu Province where Kaschin-Beck disease is prevalent. TLC, IR and UV analyses of metabolic extract of A. alternata show that A. alternata produce main secondary metabolites, including alternariol, alternariol methyl ether, and tenuazonic *** was a significant decrease in Se-GSH-Px and SOD activities, and an acceleration in lipid peroxidation in rats fed with a diet containing metabolites produced by A. alternata.

关键词： Kaschin-Beck disease Altemaria toxins lipid peroxidation Se-containing glutathione peroxidase superoxide dismutase.

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Alterations of Antioxidative Enzymes Activities and Induction of Lipid Peroxidation in Germinating Wheat Seeds Subjected to Cadmium Stress

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Journal of Life Sciences 2011年第1期5卷 22-28页

作者： Surjendu Kumar Dey Postgraduate Department of Environmental Science Fakir Mohan University Balasore-756020 India

Germinating wheat （Triticum aestivum L.） seeds were exposed to CdCI2 （50, 100 and 200 μM） for 48 h and some aspects of oxidative metabolism was assessed in the embryonic tissues. The germination percentage and the soluble protein content of the embryonic tissues were found to decrease with increasing of Cd concentration. There was elevation in superoxide dismutase.（SOD） and decline in catalase （CAT） and peroxidase （POX） activities. The increasing of lipid peroxidation levels indicated the prevalence of oxidative stress in the tissues which was probably due to the alteration of antioxidative enzymes activities. The adding of ascorbate, along with CdCl2, has resulted in restoration of the Cd induced decline in CAT activity. Weakening in H2O2 detoxification system seems to be the principal reason behind Cd induced oxidative stress in germinating seeds. Thus, imposition of oxidative stress might be the consequence of cadmium stress and this finding may help in elucidating the mechanisms underlying cadmium mediated toxicity in germinating seeds.

关键词： Ascorbate cadmium stress catalase lipid peroxidation oxidative stress peroxidase superoxide dismutase.

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Super-distant molecular hybridization of plant seeds by ion beam-mediated gene cluster

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Progress in Natural Science:Materials International 2001年第7期 79-82页

作者：宋道军陈若雷吴丽芳汪岑张鉴余增亮 Center of Fengle Ion Beam Bioengineering China Chinese Academy of Sciences Department of Life Science & Technology Hangzhou 310027 Hefei 230031 Hefei 230069 Hefei Industrial University Institute of Biological Machinery Institute of Plasma Physics Zhejiang University

The N+ beam-mediated distant molecular hybridization between Ginkgo biloba L and watermelon was studied. The results showed that the ester gene of Ginkgo biloba L was successfully expressed in two varieties of watermelon, 3-16 and SR2-l4-2, in both of which the ester quantities were measured as 17.0756 μg/g and 45.9998 μg/ g respectively. Meanwhile, superoxide dismutase.(SOD) activity in leaves of the watermelon expressing ester gene was increased twofold as compared to that of the control, showing that ion beam could mediate distant and/or super-distant donor gene expression in the cells of a receptor. Furthermore, the molecular mechanism of distant hybridization was analyzed.

关键词： ion beam distant hybridization Ginkgo biloba L watermelon ester of ginkgo blloba L superoxide dismutase.

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