Evaluation of Antioxidant Status of Two Limoniastrum Species Growing Wild in Tunisian Salty Lands

Antioxidants

Mohamed Debouba²  Sami Zouari¹ 

[1] Arid Regions Institute, Medenine 4119, Tunisia; E-Mail:;High Institute of Applied Biology of Medenine, Environmental Sciences Department, University of Gabes, route El Jorf-Km 22.5, Medenine 4119, Tunisia; E-Mail:

关键词: Limoniastrum guyonianum;    Limoniastrum monopetalum;    antioxidant;    metabolites;    DPPH;    ferrous ions chelating activity;    reducing power;    TBARS;   

DOI  :  10.3390/antiox2030122

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.