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| 1 | Lipid Peroxidation and Antioxidative Enzymes of Two Turfgrass Species Under Salinity Stress显示文摘Salinity stress is a major factor limiting the growth of turfgrass irrigated with recycled wastewater. The change in lipid peroxidation in terms of malondialdehyde (MDA) content and the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxide (APX) and glutathione reductase (GR) in the shoots and roots of Kentucky bluegrass and tall fescue were investigated under salinity stress. Plants were subjected to 0, 50, 100, 150 and 200 mmol L 1 NaCl for 40 d. The MDA content under salinity stress was lower in tall fescue than in Kentucky bluegrass in both shoots and roots. Activities of SOD in the shoots of both species increased with salinity stress. The activities of CAT and APX decreased in Kentucky bluegrass, but no significant difference in the activities of CAT and APX was observed in tall fescue. The activities of SOD, CAT and APX in the shoots of tall fescue were higher than those in Kentucky bluegrass. In the roots of Kentucky bluegrass, SOD and GR activities increased and CAT and APX activities decreased in comparison with the control. In the roots of tall fescue, salinity increased the activities of SOD, CAT, and APX. These results suggested that tall fescue exhibited a more effective protection mechanism and mitigated oxidative stress and lipid peroxidation by maintaining higher SOD, CAT and APX activities than Kentucky bluegrass. | R.XU M.YAMADA H.FUJIYAMA | 2013 | Pedosphere2013，23，2： | 6 |
| 2 | 角果木根系盐胁迫的防御机理显示文摘以强耐盐性红树植物角果木为研究对象,采用不同浓度的NaCl溶液(0,150,300,450mmol·L-1)对角果木幼苗进行盐胁迫处理,测定角果木根部的SOD,POD,ASA,MDA等生理指标。结果表明:角果木在适应盐环境的过程中有新的蛋白产生,在盐胁迫早期(≤9h)MDA含量急剧上升,这种信号诱导了抗氧化防御系统的启动,使角果木根部抗氧化酶类及抗氧化物质均有所增加,说明角果木盐胁迫下通过启动抗氧化酶类、抗氧化物质以清除活性氧对根部的损伤,而后开始适应外界盐环境。 | 臧剑 符秀梅 王鹤鸣 林道哲 吴辉 陈健妙 陈银华 | 2013 | 热带生物学报2013，4，2： | 5 |
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