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Growth alteration of Allium cepa L. roots exposed to 1.5 mT, 25 Hz pulsed magnetic field

International journal of environmental health research · 2021 · Harm · Low evidence

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HarmLow evidencePaper 1074

Onion specimens exposed to a 25 Hz, 1.5 mT pulsed magnetic field for 33 h had fewer roots grown than controls (reported across days 1–4; p<0.05). Exposed specimens also had shorter mean root length than controls across days 1–4 (p<0.001).

Study snapshot

PublicationInternational journal of environmental health research · 2021
Study typeanimal
Reported directionHarm
Evidence ratingLow

Abstract

Growth alteration of Allium cepa L. roots exposed to 1.5 mT, 25 Hz pulsed magnetic field Alejandro González-Vidal, Silvia Mercado-Sáenz, Antonio M Burgos-Molina, Francisco Sendra-Portero, Miguel J Ruiz-Gómez. Growth alteration of Allium cepa L. roots exposed to 1.5 mT, 25 Hz pulsed magnetic field. Int J Environ Health Res. 2021 Sep 2;1-13. doi: 10.1080/09603123.2021.1972090. Abstract The response of plants to magnetic fields (MF) is not fully understood. This work studies the effects of pulsed MF on the germination and growth of Allium cepa roots. Onions were exposed to 25Hz, 1.5mT, 33h. Pulsed MF was generated by a Helmholtz-type equipment that generated rectangular voltage pulses. The results showed that fewer roots grew in the specimens exposed to pulsed MF (14±6 roots on day 1 to 21±8 on day 4) than in the control groups (32±17 to 48±23) (p<0.05 Friedman). Control specimens showed a root mean length of 7±4 mm (day 1) and 24±10 mm (day 4). The specimens treated with pulsed MF showed a length of 4±2 mm (day 1), reaching 18±9 mm on day 4 (p<0.001 ANOVA). In conclusion, the exposure of Allium cepa specimens to 25Hz, 1.5mT pulsed MF during 33h produces a decrease in the germination and growth of roots. pubmed.ncbi.nlm.nih.gov

Machine Enhanced Logic

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 directionharm
PopulationAllium cepa L. (onion) specimens
Sample sizeNot supplied
ExposureELF · 33 h
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Onion specimens exposed to a 25 Hz, 1.5 mT pulsed magnetic field for 33 h had fewer roots grown than controls (reported across days 1–4; p<0.05). Exposed specimens also had shorter mean root length than controls across days 1–4 (p<0.001).

Outcomes measured

  • Root germination (number of roots grown)
  • Root growth (mean root length)

Limitations

  • Sample size not reported in the abstract
  • Only one exposure condition reported (25 Hz, 1.5 mT, 33 h)
  • Plant model; generalizability to other organisms not addressed in the abstract
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": "ELF",
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "33 h"
  },
  "population": "Allium cepa L. (onion) specimens",
  "sample_size": null,
  "outcomes": [
    "Root germination (number of roots grown)",
    "Root growth (mean root length)"
  ],
  "main_findings": "Onion specimens exposed to a 25 Hz, 1.5 mT pulsed magnetic field for 33 h had fewer roots grown than controls (reported across days 1–4; p<0.05). Exposed specimens also had shorter mean root length than controls across days 1–4 (p<0.001).",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in the abstract",
    "Only one exposure condition reported (25 Hz, 1.5 mT, 33 h)",
    "Plant model; generalizability to other organisms not addressed in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "Allium cepa",
    "pulsed magnetic field",
    "ELF magnetic field",
    "25 Hz",
    "1.5 mT",
    "germination",
    "root growth",
    "Helmholtz coil"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Uses an engineered magnetic-field exposure setup; not clearly occupational but relates to controlled exposure assessment."
    }
  ]
}
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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: 10.1080/09603123.2021.1972090
PubMed: 34474627

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