兰州大学机构库 >草地农业科技学院
Silicon alleviates oxidative damage of wheat plants in pots under drought
Gong, HJ; Zhu, XY; Chen, KM; Wang, SM(王锁民); Zhang, CL; Wang, SM (reprint author), Lanzhou Univ, Sch Pastoral Sci & Technol, Lanzhou 730000, Peoples R China.
2005-08
Source PublicationPLANT SCIENCE
ISSN0168-9452
Volume169Issue:2Pages:313-321
AbstractDrought-induced changes in oxidative damage to photosynthetic pigments, proteins and lipids, some enzyme activities and photosynthesis were investigated in wheat (Tritician aestivum L.) plants grown in pots applied with or without silicon under drought stress. Three treatments with three replicates were composed of "CK" (control, 2.11 mmol of sodium sulfate Kg(-1) soil), "DR" (drought, 2.11 mmol of sodium sulfate Kg(-1) soil) and "DSi" (drought + silicon, 2.11 mmol of sodium silicate Kg(-1) soil). Drought stress was applied by maintaining 75% of relative water content in the "CK" soil and 50% of relative water content in the drought treatments ("DR" and "DSi") for 12 days from jointing stage, after which the assays were performed on the recent fully expanded leaves. The results showed that application of silicon improved the water status of drought stressed plants. Compared with the non-silicon treatment, application of silicon increased the activities of some antioxidant enzymes: superoxide dismutase (SOD); catalase (CAT) and glutathione reductase (GR), the fatty acid unsaturation of lipids, and the contents of photosynthetic pigments and soluble proteins as well as total thiols under drought, whereas the content of hydrogen peroxide, activity of acid phospholipase (AP) and oxidative stress of proteins were decreased by applying silicon compared with those of non-silicon treatments under drought. The activities of glycolate oxidase (GO), peroxidase (POD) and ascorbate peroxidase (APX) showed no significant difference between "DR" and "DSi". In addition, application of silicon also increased the net CO2 assimilation rate of wheat leaves under drought. It was suggested that the improvement of silicon on drought tolerance of wheat plants was associated with the increase of antioxidant defense abilities, therefore alleviating oxidative damage of cellular functional molecules induced by over produced reactive oxygen species (ROS) under drought and maintaining many physiological processes of stressed plants. The present work also suggested that silicon may be involved in metabolic or physiological activities in higher plants under drought, which coincided with previous studies in salt stressed plants. (c) 2005 Elsevier Ireland Ltd. All rights reserved.
Keywordwheat (Triticum aestivian L.) drought silicon oxidative damage
Subject AreaBiochemistry & Molecular Biology ; Plant Sciences
PublisherELSEVIER
DOI10.1016/j.plantsci.2005.02.023
Publication PlaceCLARE
Indexed BySCIE ; EI ; BIOSIS
Language英语
First Inst
WOS IDWOS:000230938500004
SubtypeArticle
EI ID2005289209636
BIOSIS IDBIOSIS:PREV200510241180
DepartmentLanzhou Univ, Sch Pastoral Sci & Technol, Lanzhou 730000, Peoples R China;
Lanzhou Univ, Sch Life Sci, Lanzhou 730000, Peoples R China;
Xiamen Univ, Sch Life Sci, Xiamen 361005, Peoples R China;
Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China;
Univ Sussex, Sch Life Sci, Brighton BN1 9QG, E Sussex, England
Citation statistics
Cited Times:468[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/113534
Collection草地农业科技学院
Corresponding AuthorWang, SM (reprint author), Lanzhou Univ, Sch Pastoral Sci & Technol, Lanzhou 730000, Peoples R China.
Recommended Citation
GB/T 7714
Gong, HJ,Zhu, XY,Chen, KM,et al. Silicon alleviates oxidative damage of wheat plants in pots under drought[J]. PLANT SCIENCE,2005,169(2):313-321.
APA Gong, HJ,Zhu, XY,Chen, KM,Wang, SM,Zhang, CL,&Wang, SM .(2005).Silicon alleviates oxidative damage of wheat plants in pots under drought.PLANT SCIENCE,169(2),313-321.
MLA Gong, HJ,et al."Silicon alleviates oxidative damage of wheat plants in pots under drought".PLANT SCIENCE 169.2(2005):313-321.
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