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Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Cellular Effects

Nanometer-scale elongation rate fluctuations in the Myriophyllum aquaticum (Parrot feather) stem were altered by radio-frequency electromagnetic radiation.

No Effects Found

Senavirathna MD, Asaeda T, Thilakarathne BL, Kadono H · 2014

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Plants exposed to cell-tower-level RF radiation showed altered growth patterns for hours afterward, demonstrating non-thermal biological effects.

Plain English Summary

Summary written for general audiences

Researchers exposed aquatic plants to 2 GHz radio frequency radiation (similar to cell phone signals) for one hour and measured ultra-precise changes in how the plants grew. The radiation significantly altered the plants' natural growth patterns by 51%, and these changes persisted for at least 2.5 hours after exposure ended. This demonstrates that RF radiation can affect living organisms through non-thermal mechanisms, even in plants.

Why This Matters

This study provides important evidence that radio frequency radiation affects biological systems through mechanisms beyond simple heating. The researchers used incredibly sensitive measurement techniques to detect nanometer-scale changes in plant growth that would be invisible to conventional observation. What makes this particularly relevant is that the exposure level (1.42 W/m²) is within the range you might encounter near cell towers or high-power wireless devices. The fact that these effects persisted for hours after exposure ended suggests the radiation triggered lasting biological changes. While plants aren't humans, they share fundamental cellular processes with us, making studies like this valuable pieces in understanding how RF radiation interacts with living tissue at the cellular level.

Exposure Details

Power Density
0.142 mW/cm²
Source/Device
2 GHz
Exposure Duration
1 h

Exposure Context

This study used 0.142 mW/cm² for radio frequency:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.142 mW/cm²Extreme Concern - 1,000 µW/m²FCC Limit - 10M µW/m²Effects observed in the Extreme Concern range (Building Biology)FCC limit is 7 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The emission of radio-frequency electromagnetic radiation (EMR) by various wireless communication base stations has increased in recent years. While there is wide concern about the effects of EMR on humans and animals, the influence of EMR on plants is not well understood. In this study, we investigated the effect of EMR on the growth dynamics of Myriophyllum aquaticum (Parrot feather) by measuring the nanometric elongation rate fluctuation (NERF) using a statistical interferometry technique.

Plants were exposed to 2 GHz EMR at a maximum of 1.42 Wm(-2) for 1 h.

After continuous exposure to EMR, M. aquaticum plants exhibited a statistically significant 51 ± 16%...

Cite This Study
Senavirathna MD, Asaeda T, Thilakarathne BL, Kadono H (2014). Nanometer-scale elongation rate fluctuations in the Myriophyllum aquaticum (Parrot feather) stem were altered by radio-frequency electromagnetic radiation. Plant Signal Behav. 2014 Apr;9(4):e28590. doi: 10.4161/psb.28590.
Show BibTeX
@article{md_2014_nanometerscale_elongation_rate_fluctuations_3390,
  author = {Senavirathna MD and Asaeda T and Thilakarathne BL and Kadono H},
  title = {Nanometer-scale elongation rate fluctuations in the Myriophyllum aquaticum (Parrot feather) stem were altered by radio-frequency electromagnetic radiation.},
  year = {2014},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/24670369/},
}
PubMed: 24670369

Cited By (7 papers)

Quick Questions About This Study

Yes, 2 GHz radio frequency radiation significantly altered aquatic plant growth patterns by 51% in laboratory studies. Researchers found that Myriophyllum aquaticum plants showed measurable changes in their natural growth fluctuations after one hour of exposure, with effects persisting for at least 2.5 hours afterward.
No, 2 GHz radiation exposure did not cause heating in aquatic plants during controlled experiments. Temperature measurements confirmed that the observed 51% change in plant growth patterns was due to non-thermal biological effects, not dielectric heating from the electromagnetic radiation.
EMF effects in Myriophyllum aquaticum plants persisted for at least 2.5 hours after radiation exposure ended. The altered growth patterns showed no significant recovery during the experimental observation period, indicating that even brief EMF exposure can have lasting biological effects.
Parrot feather plants (Myriophyllum aquaticum) showed a 51% reduction in their natural growth rate fluctuations when exposed to 2 GHz radio waves for one hour. These changes occurred without any temperature increase, demonstrating that radio frequency radiation can affect plant biology through non-thermal mechanisms.
Yes, just one hour of 2 GHz exposure significantly affected living organisms in laboratory studies. Aquatic plants showed measurable changes in their cellular growth patterns that lasted for hours after exposure ended, proving that brief EMF exposure can trigger biological responses in living systems.