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2007 | 29 | 6 |
Tytuł artykułu

Effect of salicylic acid potentiates cadmium-induced oxidative damage in Oryza sativa L. leaves

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In the present investigation, we studied the possible potentiating effect of salicylic acid (SA) under Cd toxicity in Oryza sativa L. leaves. Cd treatments for 24 h reduced the shoot length, dry biomass and total chlorophyll content followed by high Cd accumulation in shoots. About 16 h presoaking with SA resulted in partial protection against Cd, as observed by minor changes in length, biomass and total chlorophyll. SA priming resulted in low Cd accumulation. Enhanced thiobarbituric acid reactive substances (TBARS), hydrogen peroxide (H₂O₂) and superoxide anion (O₂⁻) content were seen when Cd was applied alone, while under SA priming the extent of TBARS, H₂O₂ and O₂⁻ were significantly low, suggesting SA-regulated protection against oxidative stress. The antioxidant enzymes like Catalase (CAT), guaiacol peroxidase (GPx), glutathione reductase (GR) and superoxide dismutase (SOD) showed varied activities under Cd alone. CAT activity increased after Cd treatment, followed by a decline in GPX and GR activity. SOD also declined at the highest concentrations with an initial increase. Under SA-priming conditions, the efficiency of the antioxidant enzymes was significantly elevated. GPx and SOD activity showed significant increase in activity. The ascorbate activity increased after Cd treatment, followed by a decline in glutathione under SA-free condition. SA priming showed gradual increase in these non-enzymic antioxidants. Our results indicate that Cd-induced oxidative stress can be regulated by SA.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
29
Numer
6
Opis fizyczny
p.567-575,fig.,ref.
Twórcy
autor
  • Plant Biochemistry Laboratory, School of Life Sciences, Assam (Central) University, Silchar 788011, India
autor
  • Post Graduate Department of Botany, Utkal Univerity, Bhubaneswar 751004, Orissa, India
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Typ dokumentu
Bibliografia
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Identyfikator YADDA
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