Production and detoxification of H₂O₂ in lettuce plants exposed to selenium

Selenium is considered an essential element for animals. Despite that it has not been demonstrated to be essential for higher plants, it has been attributed with a protective role against reactive oxygen species in plants subjected to stress. In this study, lettuce plants (Lactuca sativa cv. Philipu...

Celý popis

Uložené v:

Podrobná bibliografia
Vydané v:	Annals of applied biology Ročník 154; číslo 1; s. 107 - 116
Hlavní autori:	Ríos, J.J, Blasco, B, Cervilla, L.M, Rosales, M.A, Sanchez-Rodriguez, E, Romero, L, Ruiz, J.M
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01.02.2009 Blackwell Publishing Ltd Blackwell
Predmet:	animals Antioxidant enzymes application rate ascorbate peroxidase Biological and medical sciences Fundamental and applied biological sciences. Psychology glutathione peroxidase hydrogen peroxide Lactuca sativa lettuce linoleate 13S-lipoxygenase lipid peroxidation malondialdehyde peroxidase protective effect selenate selenates selenite selenites selenium stress tolerance toxicity Hydrogen peroxide Lipids Compositae Dicotyledones Angiospermae Selenium Lactuca sativa Peroxidation Non metal Plant production Enzyme selenate Biochemical compound Antioxidant enzymes Detoxification Inorganic ion Antioxidant lipid peroxidation Inorganic anion Applied biology Vegetable crop Selenium compound Selenates Spermatophyta Selenites selenite
ISSN:	0003-4746, 1744-7348
On-line prístup:	Získať plný text
Tagy:	Pridať tag Žiadne tagy, Buďte prvý, kto otaguje tento záznam!

Popis
Shrnutí:	Selenium is considered an essential element for animals. Despite that it has not been demonstrated to be essential for higher plants, it has been attributed with a protective role against reactive oxygen species in plants subjected to stress. In this study, lettuce plants (Lactuca sativa cv. Philipus) received different application rates (5, 10, 20, 40, 60, 80 and 120 μM) of selenite or selenate, with the aim of testing the effect of Se on the production and detoxification of H₂O₂ in non-stressed plants. The results indicate that the form selenate is less toxic than selenite; that is, the plants tolerated and responded positively to this element, and even increasing in growth up to a rate of 40 μM for the form selenate. On the contrary, the application of selenite triggered a higher foliar concentration of H₂O₂ and a higher induction of lipid peroxidation [malondialdehyde content and lipoxygenase activity] in comparison to that observed after the selenate application. Also, the plants treated with selenate induced higher increases in enzymes that detoxify H₂O₂, especially ascorbate peroxidase and glutathione (GSH) peroxidase, as well as an increase in the foliar concentration of antioxidant compounds such as ascorbate and GSH. These data indicate that an application of selenate at low rates can be used to prevent the induction in plants of the antioxidant system, thereby improving stress resistance.
Bibliografia:	http://dx.doi.org/10.1111/j.1744-7348.2008.00276.x ark:/67375/WNG-ZN0FTR95-T ArticleID:AAB276 istex:67DF03F279A314CAA0BA8173C44030D6D1178477 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0003-4746 1744-7348
DOI:	10.1111/j.1744-7348.2008.00276.x