Analysis of apoplastic and symplastic antioxidant system in shallot leaves: Impacts of weak static electric and magnetic field

Impacts of electric and magnetic fields (EFs and MFs) on a biological organism vary depending on their application style, time, and intensities. High intensity MF and EF have destructive effects on plants. However, at low intensities, these phenomena are of special interest because of the complexity...

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Bibliographic Details
Published in:Journal of plant physiology 2012-07, Vol.169 (11), p.1066-1073
Main Authors: Cakmak, Turgay, Cakmak, Zeynep E., Dumlupinar, Rahmi, Tekinay, Turgay
Format: Article
Language:English
Subjects:
Allium
Allium ascalonicum
Antioxidant system
Antioxidants
Antioxidants - metabolism
Apoplast
Biological
Biological and medical sciences
Electric field
enzyme activity
Enzymes
Fundamental and applied biological sciences. Psychology
Impact analysis
Leaves
Lipid Peroxidation
Magnetic field
Magnetic Fields
Physiology
Plant Leaves - metabolism
Plant physiology and development
plant response
Plants (organisms)
Power plants
Reactive Oxygen Species
ROS
shallots
Shallots - metabolism
Static Electricity
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Summary:Impacts of electric and magnetic fields (EFs and MFs) on a biological organism vary depending on their application style, time, and intensities. High intensity MF and EF have destructive effects on plants. However, at low intensities, these phenomena are of special interest because of the complexity of plant responses. This study reports the effects of continuous, low-intensity static MF (7mT) and EF (20kV/m) on growth and antioxidant status of shallot (Allium ascalonicum L.) leaves, and evaluates whether shifts in antioxidant status of apoplastic and symplastic area help plants to adapt a new environment. Growth was induced by MF but EF applied emerged as a stress factor. Despite a lack of visible symptoms of injury, lipid peroxidation and H2O2 levels increased in EF applied leaves. Certain symplastic antioxidant enzyme activities and non-enzymatic antioxidant levels increased in response to MF and EF applications. Antioxidant enzymes in the leaf apoplast, by contrast, were found to show different regulation responses to EF and MF. Our results suggest that apoplastic constituents may work as potentially important redox regulators sensing and signaling environmental changes. Static continuous MF and EF at low intensities have distinct impacts on growth and the antioxidant system in plant leaves, and weak MF is involved in antioxidant-mediated reactions in the apoplast, resulting in overcoming a possible redox imbalance.
ISSN:0176-1617
1618-1328
DOI:10.1016/j.jplph.2012.03.011