首页> 外文会议>12th Symposium on Bioluminescence and Chemiluminescence, Apr 5-9, 2002, Robinson College, University of Cambridge, UK >ANTIOXIDANT ACTIVITY IN EXTRACTS FROM PLEUROCHAETE SQUARROSA (BRYOPHYTA) STRESSED BY HEAVY METALS, HEAT SHOCK AND SALINITY
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ANTIOXIDANT ACTIVITY IN EXTRACTS FROM PLEUROCHAETE SQUARROSA (BRYOPHYTA) STRESSED BY HEAVY METALS, HEAT SHOCK AND SALINITY

机译:重金属,热冲击和盐度胁迫下杏鲍菇提取物中的抗氧化活性

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Several cell components can be damaged by free radicals formed under biotic and abiotic stresses such as heavy metal pollution, salinity, pathogenic infections, heat shock etc. Plants have developed mechanisms to remove these free radicals (e.g., via enzymatic and non-enzymatic antioxidative systems such as glutathione, vitamins C and E, and hydroquinones) and it is known that levels of total glutathione and glutathione reductase activities increase with increasing metal uptake or other environmental stresses. Only scarce data are available on antioxidant activity in extracts from Bryophyta. Here we studied the antioxidant activity of the moss Pleurochaete squarrosa (Pottiaceae) a species which chiefly grows on the sandy soil of Mediterranean "macchia" and pine-wood vegetation and is resistant to many environmental stresses. The effects of heat shock, salinity and two heavy metals, lead and cadmium, on antioxidant activity of the moss was studied and discussed in relation to its resistance capacity to different stresses. For this study, the acetonic extracts of the moss Pleurochaete squarrosa were tested for antioxidant activity, on human whole blood leukocytes, as well as on isolated neutrophils, by a chemiluminescence (CL) assay.
机译:在生物和非生物胁迫(例如重金属污染,盐度,病原性感染,热休克等)下形成的自由基会破坏几种细胞成分。植物已开发出去除这些自由基的机制(例如,通过酶促和非酶促抗氧化系统(例如谷胱甘肽,维生素C和E以及对苯二酚),并且众所周知,总谷胱甘肽和谷胱甘肽还原酶活性的水平会随着金属吸收或其他环境压力的增加而增加。苔藓植物提取物中只有很少的抗氧化活性数据。在这里,我们研究了苔藓侧耳科(Pottiaceae)的抗氧化活性,该科目主要生长在地中海“马奇亚”和松木植被的沙质土壤上,并能抵抗许多环境胁迫。研究并讨论了热冲击,盐度和两种重金属铅和镉对苔藓的抗氧化活性的影响,并讨论了其对不同压力的抵抗能力。对于本研究,通过化学发光(CL)分析测试了苔藓侧耳草的丙酮提取物对人全血白细胞以及分离的中性粒细胞的抗氧化活性。

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