Production of reactive oxygen species and antioxidant enzymes of pea and soybean plants under hypoxia and high CO2 concentration in medium

Generation of reactive oxygen species (ROS) and activities of antioxidant enzymes (catalase, peroxidase, ascorbate peroxidase) in pea (Pisum sativum L.) and soybean (Glycine max L.) under hypoxia (3–24 h) and high CO2 concentration in medium were studied. In sensitive to hypoxia pea seedlings, hypox...

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Bibliographic Details
Published in:Russian journal of plant physiology 2011-11, Vol.58 (6), p.982-990
Main Authors: Ershova, A. N, Popova, N. V, Berdnikova, O. S
Format: Article
Language:English
Subjects:
antioxidant activity
ascorbate peroxidase
Biomedical and Life Sciences
carbon dioxide
catalase
cell respiration
cells
enzyme activity
Glycine max
hydrogen peroxide
hydroperoxides
hypoxia
Life Sciences
oxygen
peas
peroxidase
Pisum sativum
plant adaptation
Plant Physiology
Plant Sciences
plant tissues
Research Papers
seedlings
soybeans
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Summary:Generation of reactive oxygen species (ROS) and activities of antioxidant enzymes (catalase, peroxidase, ascorbate peroxidase) in pea (Pisum sativum L.) and soybean (Glycine max L.) under hypoxia (3–24 h) and high CO2 concentration in medium were studied. In sensitive to hypoxia pea seedlings, hypoxia enhanced markedly production of superoxide anion-radical, hydroperoxides, and especially hydrogen peroxide. In more tolerant soybean plants, these changes were less pronounced. During first hours of hypoxia, activity of lipoxygenase in plant cells increased. This allows a suggestion that this enzyme is involved in the processes of hydroperoxide accumulation in plant tissues under oxygen deficit. In pea and soybean plants, a correlation between tolerance to hypoxia, the rate of ROS generation, and antioxidant enzyme activities was established. During the first hours of hypoxia, the catalase activity in soybean plants increased stronger than in sensitive to hypoxia pea plants. At longer exposure to hypoxia (24 h), peroxidases started to play the higher role in cell defense against hypoxia, but only in soybean plants. The medium with the higher CO2 content induced higher changes in the processes of ROS accumulation and activities of lipoxygenase and antioxidant enzymes. This permits us to refer CO2, accumulated as a product of respiration in the cells, to low-molecular signal molecules switching on plant adaptation to hypoxic stress.
ISSN:1021-4437
1608-3407
DOI:10.1134/S1021443711050074