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Antioxidant response system in the short-term post-wounding effect in Mesembryanthemum crystallinum leaves

Ślesak, Ireneusz ; Ślesak, Halina ; Libik, Marta ; Miszalski, Zbigniew

Journal of plant physiology, 2008-02, Vol.165 (2), p.127-137 [Periódico revisado por pares]

Jena: Elsevier GmbH

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Título:
Antioxidant response system in the short-term post-wounding effect in Mesembryanthemum crystallinum leaves
Autor: Ślesak, Ireneusz ; Ślesak, Halina ; Libik, Marta ; Miszalski, Zbigniew
Assuntos: antioxidant activity ; Antioxidants - metabolism ; Biological and medical sciences ; catalase ; Catalase - metabolism ; Crassulacean acid metabolism ; Electrophoresis, Polyacrylamide Gel ; Fundamental and applied biological sciences. Psychology ; Generalities. Disease free stocks ; hydrogen peroxide ; Hydrogen Peroxide - metabolism ; Major vein ; Malate Dehydrogenase - metabolism ; malic enzyme ; mechanical damage ; Mesembryanthemum - enzymology ; Mesembryanthemum - metabolism ; Mesembryanthemum crystallinum ; Oxidative stress ; physiological response ; Phytopathology. Animal pests. Plant and forest protection ; plant damage ; Plant Leaves - enzymology ; Plant Leaves - metabolism ; plant response ; stomatal conductance ; superoxide dismutase ; Superoxide Dismutase - metabolism ; Vascular tissues
É parte de: Journal of plant physiology, 2008-02, Vol.165 (2), p.127-137
Notas: http://dx.doi.org/10.1016/j.jplph.2007.03.015
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Descrição: Mechanical wounding of Mesembryanthemum crystallinum leaves in planta induced a fast decrease in stomatal conductance, which was related to accumulation of hydrogen peroxide (H 2O 2). Higher levels of H 2O 2 were accompanied by an increase in total activity of superoxide dismutase (SOD) and a decrease in catalase (CAT) activity. Among SOD forms, manganese SOD (MnSOD) and copper/zinc SOD (Cu/ZnSOD) seem to be especially important sources of H 2O 2 at early stages of wounding response. Moreover, NADP-malic enzyme (NADP-ME), one of the key enzymes of primary carbon metabolism, which is also involved in stress responses, showed a strong increase in activity in wounded leaves. All these symptoms: high accumulation of H 2O 2, high activities of Cu/ZnSOD and NADP-ME, together with the decrease of CAT activity, were also observed in the major veins of unwounded leaves. The potential role of veinal tissues as an important source of H 2O 2 during wounding response is discussed.
Editor: Jena: Elsevier GmbH
Idioma: Inglês

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Antioxidant response system in the short-term post-wounding effect in Mesembryanthemum crystallinum leaves

Ślesak, Ireneusz ; Ślesak, Halina ; Libik, Marta ; Miszalski, Zbigniew

Jena: Elsevier GmbH

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