Influence of pulsed magnetic field on soybean (Glycine max L.) seed germination, seedling growth and soil microbial population.

Indian journal of biochemistry & biophysics · 2013 · Benefit · Low evidence

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BenefitLow evidencePaper 3076

Study snapshot

PublicationIndian journal of biochemistry & biophysics · 2013

Study typeanimal

Reported directionBenefit

Evidence ratingLow

Abstract

The effects of pulsed magnetic field (PMF) treatment of soybean (Glycine max L. cv CO3) seeds were investigated on rate of seed germination, seedling growth, physico-chemical properties of seed leachates and soil microbial population under laboratory conditions. Seeds were exposed to PMF of 1500 nT at 0.1, 1.0 10.0 and 100.0 Hz for 5 h per day for 20 days, induced by enclosure coil systems. Non-treated seeds were considered as controls. All PMF treatments significantly increased the rate of seed germination, while 10 and 100 Hz PMFs showed the most effective response. The 1.0 and 10 Hz PMFs remarkably improved the fresh weight of shoots and roots, leaf area and plant height from seedlings from magnetically-exposed seeds compared to the control, while 10 Hz PMF increased the total soluble sugar, total protein and phenol contents. The leaf chlorophyll a, b and total chlorophyll were higher in PMF (10 and 100 Hz) pretreated plants, as compared to other treatments. In addition, activities of alpha-amylase, acid phosphatase, alkaline phosphatase, nitrate reductase, peroxidase and polyphenoloxidase were increased, while beta-amylase and protease activities were declined in PMF (10 Hz)-exposed soybean plants. Similarly, the capacity of absorbance of water by seeds and electrical conductivity of seed leachates were significantly enhanced by 10 Hz PMF exposure, whereas PMF (10 Hz) pretreated plants did not affect the microbial population in rhizosphere soil. The results suggested the potential of 10 Hz PMF treatment to enhance the germination and seedling growth of soybean.

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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 typeanimal

Effect directionbenefit

PopulationSoybean (Glycine max L. cv CO3) seeds/seedlings (laboratory conditions)

Sample sizeNot supplied

ExposureELF · 5 h/day for 20 days

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Soybean seeds exposed to pulsed magnetic fields (1500 nT; 0.1, 1.0, 10.0, 100.0 Hz) showed significantly increased germination rates versus controls, with 10 and 100 Hz described as most effective. Several growth and biochemical measures were improved particularly at 1.0 and 10 Hz (growth) and at 10 Hz (sugars/protein/phenols, multiple enzyme activity changes), while 10 Hz pretreatment did not affect rhizosphere soil microbial population.

Outcomes measured

Seed germination rate
Seedling growth (fresh weight of shoots/roots, leaf area, plant height)
Seed leachate physico-chemical properties (water absorbance capacity, electrical conductivity)
Biochemical contents (total soluble sugar, total protein, phenols)
Leaf chlorophyll (a, b, total)
Enzyme activities (alpha-amylase, beta-amylase, acid phosphatase, alkaline phosphatase, nitrate reductase, peroxidase, polyphenoloxidase, protease)
Rhizosphere soil microbial population

Limitations

Sample size not reported in abstract
Laboratory study on plants; generalizability to field conditions not stated
Exposure metric limited to magnetic flux density (1500 nT) and frequency; other dosimetry details not provided

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "ELF",
    "source": "enclosure coil system (pulsed magnetic field treatment of seeds)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "5 h/day for 20 days"
  },
  "population": "Soybean (Glycine max L. cv CO3) seeds/seedlings (laboratory conditions)",
  "sample_size": null,
  "outcomes": [
    "Seed germination rate",
    "Seedling growth (fresh weight of shoots/roots, leaf area, plant height)",
    "Seed leachate physico-chemical properties (water absorbance capacity, electrical conductivity)",
    "Biochemical contents (total soluble sugar, total protein, phenols)",
    "Leaf chlorophyll (a, b, total)",
    "Enzyme activities (alpha-amylase, beta-amylase, acid phosphatase, alkaline phosphatase, nitrate reductase, peroxidase, polyphenoloxidase, protease)",
    "Rhizosphere soil microbial population"
  ],
  "main_findings": "Soybean seeds exposed to pulsed magnetic fields (1500 nT; 0.1, 1.0, 10.0, 100.0 Hz) showed significantly increased germination rates versus controls, with 10 and 100 Hz described as most effective. Several growth and biochemical measures were improved particularly at 1.0 and 10 Hz (growth) and at 10 Hz (sugars/protein/phenols, multiple enzyme activity changes), while 10 Hz pretreatment did not affect rhizosphere soil microbial population.",
  "effect_direction": "benefit",
  "limitations": [
    "Sample size not reported in abstract",
    "Laboratory study on plants; generalizability to field conditions not stated",
    "Exposure metric limited to magnetic flux density (1500 nT) and frequency; other dosimetry details not provided"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "pulsed magnetic field",
    "PMF",
    "ELF magnetic field",
    "soybean",
    "seed germination",
    "seedling growth",
    "chlorophyll",
    "enzyme activity",
    "soil microbial population"
  ],
  "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: Not supplied
PubMed: 24772951

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