EMF-Portal - Clastogenic effects of radiofrequency radiations on chromosomes of Tradescantia (1994)

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Medical/biological Study (experimental study)

Clastogenic effects of radiofrequency radiations on chromosomes of Tradescantia. med./biol.

By: Haider T, Knasmueller S, Kundi M, Haider M
Published in: Mutation Research - Letters 1994; 328 (1-2): 65 - 68 ( open external web page

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Aim of study (according to author)
To determine the clastogenic effect of radiofrequency radiation in an in situ experiment with the Tradescantia micronucleus test (Trad-MCN-test).
Background/further details:
The assay was used as a monitor to find out whether short-wave electromagnetic fields in the vicinity of broadcasting antennae could cause chromosome damage.

Comment on Aim of Study (up to 2000 characters):

Endpoint

genotoxicity/mutation: clastogenic effects/formation of micronuclei

Comment on Endpoints (up to 2000 characters):

Exposure
General category: radio frequency field

Field characteristics

Parameters

- 20 MHz

amplitude modulation
exposure duration: 30 hrs

electric field strength: 400 mV/cm

(in wooden chamber 30 m from slewable curtain antenna)
electric field strength: 700 mV/cm

(in wooden chamber 30 m from the vertical cage antenna at 14 MHz)
electric field strength: 400 mV/cm

(in mesh cage 30 m from the slewable curtain antenna at 10 MHz)
electric field strength: 900 mV/cm

(in wooden chamber 15 m from the vertical cage antenna at 14 MHz)
magnetic field strength: 110 mA/m

(in mesh cage 10 m from the slewable curtain antenna at 18-21 MHz)
electric field strength: 10 mV/cm

(to 3 V/m; in wooden chamber 200 m from the broadcasting area)
electric field strength: 650 mV/cm

(to 170 V/m; in a mesh cage at 10 m from the slewable curtain antenna at 18-21 MHz)

FIELD View further expo parameters

Comment on field characteristics (up to 2000 characters):

Exposed system:
plant (species/strain): Tradescantia (plant cuttings of clone #4430)
whole body exposure

Comment on exposed system (up to 2000 characters):

Methods
Endpoint/Measurement parameters/Methodology

genotoxicity/mutation: frequency of micronuclei (analyse of early tetrad stage; Tradescantia micronucleus test (Trad-MCN-test))

investigated material: DNA/RNA (in vitro), intact cell/cell culture (in vitro), pollen mother cells; chromosomes

time of investigation: after exposure

Comment on methods (up to 2000 characters):

Main outcome of study (according to author)
At all exposure sites in the immediate vicinity of the antennae a statistically significant increase of micronucleus formation was found. Since the parallel exposure in a non-shielding and a shielding cage also revealed significant differences in micronucleus frequencies, the clastogenic effects are attributable to the short-wave radiation from the antennae.

Comment on main outcome (up to 2000 characters):

(Study character: medical/biological study, experimental study, full/main study)

General comment on article (up to 2000 characters):

Study funded by

not stated/none

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Glossary: amplitude modulation, antennae, assay, biological, broadcasting, cell culture, cells, chromosomes, clastogenic, clone, DNA, electric field strength, electromagnetic fields, endpoint, exposure, frequencies, full/main study, genotoxicity, in situ, in vitro, magnetic field strength, MHz, Micronucleus, monitor, mutation, plant, radiation, radiofrequency, RNA, significant, species, statistically, strain, Trad-MCN-test, vertical, whole body exposure

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