Arid
DOI10.1016/j.envexpbot.2014.11.004
Drought tolerance in a Saharian plant Oudneya africana: Role of antioxidant defences
Talbi, Sihem1; Romero-Puertas, Maria C.2; Hernandez, Alexander2; Terron, Laura2; Ferchichi, Ali1; Sandalio, Luisa M.2
通讯作者Sandalio, Luisa M.
来源期刊ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN0098-8472
EISSN1873-7307
出版年2015
卷号111页码:114-126
英文摘要

Drought is one of the most limiting factors for plant survival mainly in arid areas. The predicted increase of temperature and dryness due to climate change will exacerbate this problem in many areas throughout the world. In this work, we analyze the mechanism involved in drought tolerance in a Saharan plant, Oudneya africana, by using two different irrigation regimes, a time course analysis, as well as re-watering after drought. The content of hydrogen peroxide (H2O2), NO, lipid peroxidation, enzymatic and nonenzymatic antioxidants and NADPH sources in leaves was analyzed. Drought induces the accumulation of H2O2 and NO, being the highest rate observed under the most severe conditions. The glycolate oxidase (GOX; EC 1.1.3.1) from photorespiration has been demonstrated to be one of the most important sources of H2O2. Water deficit produces disturbances in enzymatic and non enzymatic antioxidants to cope with the increase of reactive oxygen accumulation and differentially affected the pattern of superoxide dismutases (SOD; EC 1.15.1.1) and peroxidases (POX). The analysis of principal component shows a positive and significant relationship between the redox status (GSH/GSSG; ASC/DHA), glutathione reductase (GR; EC 1.6.4.2), the malate dehydrogenase (MDH; EC 1.1.1.37) and NADP-depend isocitrate dehydoregenase (NADP-ICDH; EC 1.1.1. 42) under long term treatment, suggesting that tolerance of Oudneya under these conditions is mainly due to the ASC-GSH cycle efficiency. Under medium drought stress the higher correlation was observed between DHA, ASC and glutathione S-transferase (GST; EC 2.5.1.18), while during the rehydration period catalase (CAT; EC 1.11.1.6), H2O2, GOX, NO and guayacol peroxidase (GPX; EC 1.11.1.7) show a high correlation, suggesting an important role of peroxidases and photorespiration in the adjustment of metabolic pathways during drought recovery. These results also show that longer exposure to medium stress has a stronger effect than shorter periods at higher intensity. The results obtained in this work suggest that Oudneya has the ability to activate a complex antioxidative defense system involved in the drought tolerance regulation probably involving H2O2-dependent signals. (C) 2014 Elsevier B.V. All rights reserved.


英文关键词Antioxidants Drought stress Hydrogen peroxide Nitric oxide Oudneya africana Oxidative stress Peroxidases
类型Review
语种英语
国家Tunisia ; Spain
收录类别SCI-E
WOS记录号WOS:000348895100011
WOS关键词CYTOSOLIC ASCORBATE PEROXIDASE ; GLUTATHIONE S-TRANSFERASES ; NITRIC-OXIDE ; SUPEROXIDE-DISMUTASE ; STRESS TOLERANCE ; WATER-STRESS ; OXIDATIVE STRESS ; REACTIVE OXYGEN ; BIOCHEMICAL RESPONSES ; ENZYMATIC-ACTIVITY
WOS类目Plant Sciences ; Environmental Sciences
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186952
作者单位1.Inst Arid Land, Arid Land & Oasis Cropping Lab, Medenine 4119, Tunisia;
2.CSIC, Estn Expt Zaidin, Dept Bioquim Biol Celular & Mol Plantas, E-18008 Granada, Spain
推荐引用方式
GB/T 7714
Talbi, Sihem,Romero-Puertas, Maria C.,Hernandez, Alexander,et al. Drought tolerance in a Saharian plant Oudneya africana: Role of antioxidant defences[J],2015,111:114-126.
APA Talbi, Sihem,Romero-Puertas, Maria C.,Hernandez, Alexander,Terron, Laura,Ferchichi, Ali,&Sandalio, Luisa M..(2015).Drought tolerance in a Saharian plant Oudneya africana: Role of antioxidant defences.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,111,114-126.
MLA Talbi, Sihem,et al."Drought tolerance in a Saharian plant Oudneya africana: Role of antioxidant defences".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 111(2015):114-126.
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