Debouba Mohamed, Zouari Sami, Zouari Nacim
High Institute of Applied Biology of Medenine, Environmental Sciences Department, University of Gabes, route El Jorf-Km 22.5, Medenine 4119, Tunisia.
Arid Regions Institute, Medenine 4119, Tunisia.
Antioxidants (Basel). 2013 Aug 2;2(3):122-31. doi: 10.3390/antiox2030122.
We aim to highlight the differential antioxidant status of Limoniastrum guyonianum and Limoniastrum monopetalum in relation to their respective chemical and location characteristics. Metabolite analysis revealed similar contents in phenolic, flavonoïds, sugars and chlorophyll in the two species' leaves. Higher amounts of proline (Pro), carotenoïds (Carot), sodium (Na) and potassium (K) were measured in L. monopetalum leaves relative to L. guyonianum ones. While the two Limoniastrum species have similar free radical DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging activity, L. guyonianum showed more than two-fold higher ferrous ions chelating activity relative to L. monopetalum. However, highest reducing power activity was observed in L. monopetalum. Thiobarbituric acid-reactive substances (TBARS) determination indicated that L. monopetalum behave better lipid membrane integrity relative to L. guyonianum. These findings suggested that the lesser stressful state of L. monopetalum was related to higher metabolites accumulation and reducing capacity compared to L. guyonianum.
我们旨在强调盖氏补血草（Limoniastrum guyonianum）和单瓣补血草（Limoniastrum monopetalum）在抗氧化状态上的差异，及其各自的化学和位置特征。代谢物分析显示，这两个物种叶片中的酚类、黄酮类、糖类和叶绿素含量相似。相对于盖氏补血草，单瓣补血草叶片中的脯氨酸（Pro）、类胡萝卜素（Carot）、钠（Na）和钾（K）含量更高。虽然这两种补血草具有相似的清除自由基二苯代苦味酰基自由基（DPPH）的活性，但盖氏补血草的亚铁离子螯合活性比单瓣补血草高出两倍多。然而，单瓣补血草的还原能力活性最高。硫代巴比妥酸反应性物质（TBARS）测定表明，相对于盖氏补血草，单瓣补血草的脂质膜完整性更好。这些发现表明，与盖氏补血草相比，单瓣补血草较低的应激状态与其较高的代谢物积累和还原能力有关。
