Effect of Extremely Low Power Time-Varying Electromagnetic Field on Germination and Other Characteristics in Foxtail Millet (Setaria italica) Seeds.

Bioelectromagnetics · 2020 · Benefit · Low evidence

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BenefitLow evidencePaper 5627

Study snapshot

PublicationBioelectromagnetics · 2020

Study typeother

Reported directionBenefit

Evidence ratingLow

Abstract

The ability of extremely low, time-varying electromagnetic field (EMF) to improve germination efficacy was studied in Foxtail millet (Setaria italica) seeds using response surface methodology. An optimal factorial central composite design was chosen to optimize the EMF with three critical factors, viz. frequency, intensity, and duration. The adequacy of the model and fitness was evaluated by analysis of variance and regression coefficients. This model suggested that the factors, frequency, and intensity had a significant impact on germination. Optimal conditions for germination were observed to be 10 Hz frequency, 30,007 nT intensity, and 30-min duration with an observed germination percentage of 93.0, and a predicted germination percentage of 92.92. Magneto-priming was found to increase the germination efficacy (15.66%), shoot length (27.78%), total seedling length (20.30%), seedling dry mass (26.49%), and water uptake (34.48% at 80 min) showing significant output when compared with the control and positive controls. Remarkable improvements were observed in germination parameters such as vigor index-1 (39.14%), vigor index-2 (46.28%), speed of germination (27.52%), and emergence index (12.50%). Magneto-priming was found to reduce the levels of germination-specific enzymes, viz. α-amylase, protease, and dehydrogenase, while it enhanced the levels of antioxidant enzymes, viz. catalase (114.63%) and superoxide dismutase (19.62%), triggering fast germination and early vigor of seedlings. This study clearly showed that EMF priming significantly improved the germination effect and other characteristics of Foxtail millet seeds. Bioelectromagnetics. © 2020 Bioelectromagnetics Society.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionbenefit

PopulationFoxtail millet (Setaria italica) seeds

Sample sizeNot supplied

ExposureELF · 30 min (optimal condition tested/identified)

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Using response surface methodology, frequency and intensity were reported to significantly impact germination. Optimal conditions were 10 Hz, 30,007 nT, and 30 min, with observed germination 93.0% (predicted 92.92%). Magneto-priming increased multiple germination and seedling growth metrics versus control/positive controls, reduced levels of α-amylase/protease/dehydrogenase, and increased catalase and superoxide dismutase.

Outcomes measured

Germination percentage
Germination efficacy
Shoot length
Total seedling length
Seedling dry mass
Water uptake
Vigor index-1
Vigor index-2
Speed of germination
Emergence index
Germination-specific enzymes (α-amylase, protease, dehydrogenase)
Antioxidant enzymes (catalase, superoxide dismutase)

Limitations

Sample size not reported in abstract
Exposure characterization limited to frequency/intensity/duration; other dosimetry details not provided
Study design details (randomization/blinding) not described in abstract

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "30 min (optimal condition tested/identified)"
  },
  "population": "Foxtail millet (Setaria italica) seeds",
  "sample_size": null,
  "outcomes": [
    "Germination percentage",
    "Germination efficacy",
    "Shoot length",
    "Total seedling length",
    "Seedling dry mass",
    "Water uptake",
    "Vigor index-1",
    "Vigor index-2",
    "Speed of germination",
    "Emergence index",
    "Germination-specific enzymes (α-amylase, protease, dehydrogenase)",
    "Antioxidant enzymes (catalase, superoxide dismutase)"
  ],
  "main_findings": "Using response surface methodology, frequency and intensity were reported to significantly impact germination. Optimal conditions were 10 Hz, 30,007 nT, and 30 min, with observed germination 93.0% (predicted 92.92%). Magneto-priming increased multiple germination and seedling growth metrics versus control/positive controls, reduced levels of α-amylase/protease/dehydrogenase, and increased catalase and superoxide dismutase.",
  "effect_direction": "benefit",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure characterization limited to frequency/intensity/duration; other dosimetry details not provided",
    "Study design details (randomization/blinding) not described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low frequency",
    "time-varying electromagnetic field",
    "ELF-EMF",
    "magneto-priming",
    "seed germination",
    "Setaria italica",
    "response surface methodology",
    "10 Hz",
    "30,007 nT"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.22292
PubMed: 32865253

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