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EFFECTS OF VERY SMALL DOSES OF IONIZING RADIATION AND HYPOMAGNETIC FIELD CHANGE PHYSIOLOGICAL CHARACTERISTICS OF
Weakened geomagnetic fields negatively impact plant seed germination and growth. Water
Area of Science:
- Plant physiology
- Environmental science
- Radiation biology
Background:
- Geomagnetic field (GMF) and ionizing radiation effects on biological systems are complex.
- Water's role as a mediator in these interactions is not fully understood.
- Investigating combined environmental stressors is crucial for understanding plant development.
Purpose of the Study:
- To examine the effects of a weakened geomagnetic field (GMF) and low-dose alpha (α) and gamma (γ) radiation on higher plant seeds.
- To assess the impact of these factors on seed physiological characteristics and water redox properties.
- To determine the role of water as a mediator in GMF and radiation effects.
Main Methods:
- Exposure of higher plant seeds to a 40-times weakened GMF, directly and water-mediated.
- Combined exposure with low-dose α-radiation (from 239Pu) and γ-radiation (from 137Cs).
- Measurement of seed germination rates, seedling development, and water's redox potential (ROP).
Main Results:
- Weakened GMF exposure, direct or water-mediated, decreased germination and retarded seedling development.
- Water-mediated low γ-doses moderated the negative GMF effect, while low α-doses augmented it, indicating radiation dominance.
- Low α-radiation increased water ROP nonlinearly; γ-radiation caused narrower ROP changes, impacting seed growth differently.
- Water ROP increased with decreasing magnetic field induction, suggesting reduced internal energy and enhanced oxidative qualities, potentially causing germination inhibition.
Conclusions:
- Water acts as a key determinant, mediating the effects of GMF and radiation on plant seeds.
- Changes in water's redox properties significantly influence seed germination and seedling development under these conditions.
- The study highlights the intricate interplay between geomagnetic fields, ionizing radiation, and water's physicochemical characteristics in biological systems.
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