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Antioxidative and growth-promoting effect of selenium on senescing lettuce
Xue, TL; Hartikainen, H; Piironen, V
2001-11-01
Source PublicationPLANT AND SOIL
Volume237Issue:1Pages:55-61
AbstractIn human and animal cells, Se plays an essential role in antioxidation and exerts an antiaging function but it is toxic at high dietary intake. To increase its intake in forage and foodstuffs, Se fertilization is adopted in some countries where soils are low in bioavailable Se, even though higher plants are regarded not to require Se. To test its ability to counteract senescence-related oxidative stress in higher plants, a pot experiment was carried out with lettuce (Lactuca sativa) cultivated with increasing amounts of H(2)SeO(4). The yields harvested 7 or 14 weeks after sowing revealed that a low Se dosage (0.1 mg kg(-1) soil) stimulated the growth of senescing seedlings (dry weight yield by 14%) despite a decreased chlorophyll concentration. The growth-promoting function was related to diminished lipid peroxidation. In young and senescing plants, the antioxidative effect of Se was associated with the increased activity of glutathione peroxidase (GSH-Px). In the senescing plants, the added Se strengthened the antioxidative capacity also by preventing the reduction of tocopherol concentration and by enhancing superoxide dismutase (SOD) activity. When no Se was added, tocopherols and SOD activity diminished during plant senescence. The higher Se dosage (1.0 mg kg(-1) soil) was toxic and reduced the yield of young plants. In the senescing plants, it diminished the dry weight yield but not the fresh weight yield.
SubtypeArticle
KeywordAntioxidant Gsh-px Lettuce Selenium Senescence Sod Tocopherol
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedAgriculture ; Plant Sciences
WOS KeywordWHITE-MUSCLE DISEASE ; IODOTHYRONINE DEIODINASE ; GLUTATHIONE-PEROXIDASE ; PLANT-GROWTH ; VITAMIN-E ; SELENOPROTEIN ; ETHYLENE ; TISSUE ; PURIFICATION ; IRRADIATION
Indexed BySCI
Language英语
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000172861900006
PublisherSPRINGER
Citation statistics
Cited Times:260[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68308
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHartikainen, H
Affiliation1.Univ Helsinki, Dept Appl Chem & Microbiol, SF-00014 Helsinki, Finland
2.Chinese Acad Sci, Inst Geog, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Xue, TL,Hartikainen, H,Piironen, V. Antioxidative and growth-promoting effect of selenium on senescing lettuce[J]. PLANT AND SOIL,2001,237(1):55-61.
APA Xue, TL,Hartikainen, H,&Piironen, V.(2001).Antioxidative and growth-promoting effect of selenium on senescing lettuce.PLANT AND SOIL,237(1),55-61.
MLA Xue, TL,et al."Antioxidative and growth-promoting effect of selenium on senescing lettuce".PLANT AND SOIL 237.1(2001):55-61.
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