Antioxidant responses of wheat plants under stress |
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Authors: | Andréia Caverzan Alice Casassola Sandra Patussi Brammer |
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Institution: | 1.Programa Nacional de Pós-Doutorado (PNPD/CNPq), Empresa Brasileira de Pesquisa Agropecuária, Embrapa Trigo, Passo Fundo, RS, Brazil;2.Programa de Pós-Graduação em Agronomia, Faculdade de Agronomia e Medicina Veterinária (FAMV), Universidade de Passo Fundo, Passo Fundo, RS, Brazil;3.Empresa Brasileira de Pesquisa Agropecuária, Embrapa Trigo, Passo Fundo, RS, Brazil |
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Abstract: | Currently, food security depends on the increased production of cereals such as wheat
(Triticum aestivum L.), which is an important source of calories
and protein for humans. However, cells of the crop have suffered from the
accumulation of reactive oxygen species (ROS), which can cause severe oxidative
damage to the plants, due to environmental stresses. ROS are toxic molecules found in
various subcellular compartments. The equilibrium between the production and
detoxification of ROS is sustained by enzymatic and nonenzymatic antioxidants. In the
present review, we offer a brief summary of antioxidant defense and hydrogen peroxide
(H2O2) signaling in wheat plants. Wheat plants increase
antioxidant defense mechanisms under abiotic stresses, such as drought, cold, heat,
salinity and UV-B radiation, to alleviate oxidative damage. Moreover,
H2O2 signaling is an important factor contributing to stress
tolerance in cereals. |
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Keywords: | abiotic stress antioxidant enzymes hydrogen peroxide signaling wheat Triticum aestivum |
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