Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography
X-ray Computed Tomography (CT) is a non-destructive imaging technique originally designed for diagnostic medicine, which was adopted for rhizosphere and soil science applications in the early 1980s. X-ray CT enables researchers to simultaneously visualise and quantify the heterogeneous soil matrix o...
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| Format: | Online |
| Language: | English |
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Public Library of Science
2013
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3693932/ |
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pubmed-3693932 |
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pubmed-36939322013-07-09 Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography Zappala, Susan Helliwell, Jonathan R. Tracy, Saoirse R. Mairhofer, Stefan Sturrock, Craig J. Pridmore, Tony Bennett, Malcolm Mooney, Sacha J. Research Article X-ray Computed Tomography (CT) is a non-destructive imaging technique originally designed for diagnostic medicine, which was adopted for rhizosphere and soil science applications in the early 1980s. X-ray CT enables researchers to simultaneously visualise and quantify the heterogeneous soil matrix of mineral grains, organic matter, air-filled pores and water-filled pores. Additionally, X-ray CT allows visualisation of plant roots in situ without the need for traditional invasive methods such as root washing. However, one routinely unreported aspect of X-ray CT is the potential effect of X-ray dose on the soil-borne microorganisms and plants in rhizosphere investigations. Here we aimed to i) highlight the need for more consistent reporting of X-ray CT parameters for dose to sample, ii) to provide an overview of previously reported impacts of X-rays on soil microorganisms and plant roots and iii) present new data investigating the response of plant roots and microbial communities to X-ray exposure. Fewer than 5% of the 126 publications included in the literature review contained sufficient information to calculate dose and only 2.4% of the publications explicitly state an estimate of dose received by each sample. We conducted a study involving rice roots growing in soil, observing no significant difference between the numbers of root tips, root volume and total root length in scanned versus unscanned samples. In parallel, a soil microbe experiment scanning samples over a total of 24 weeks observed no significant difference between the scanned and unscanned microbial biomass values. We conclude from the literature review and our own experiments that X-ray CT does not impact plant growth or soil microbial populations when employing a low level of dose (<30 Gy). However, the call for higher throughput X-ray CT means that doses that biological samples receive are likely to increase and thus should be closely monitored. Public Library of Science 2013-06-26 /pmc/articles/PMC3693932/ /pubmed/23840640 http://dx.doi.org/10.1371/journal.pone.0067250 Text en © 2013 Zappala et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Zappala, Susan Helliwell, Jonathan R. Tracy, Saoirse R. Mairhofer, Stefan Sturrock, Craig J. Pridmore, Tony Bennett, Malcolm Mooney, Sacha J. |
| spellingShingle |
Zappala, Susan Helliwell, Jonathan R. Tracy, Saoirse R. Mairhofer, Stefan Sturrock, Craig J. Pridmore, Tony Bennett, Malcolm Mooney, Sacha J. Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography |
| author_facet |
Zappala, Susan Helliwell, Jonathan R. Tracy, Saoirse R. Mairhofer, Stefan Sturrock, Craig J. Pridmore, Tony Bennett, Malcolm Mooney, Sacha J. |
| author_sort |
Zappala, Susan |
| title |
Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography |
| title_short |
Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography |
| title_full |
Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography |
| title_fullStr |
Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography |
| title_full_unstemmed |
Effects of X-Ray Dose On Rhizosphere Studies Using X-Ray Computed Tomography |
| title_sort |
effects of x-ray dose on rhizosphere studies using x-ray computed tomography |
| description |
X-ray Computed Tomography (CT) is a non-destructive imaging technique originally designed for diagnostic medicine, which was adopted for rhizosphere and soil science applications in the early 1980s. X-ray CT enables researchers to simultaneously visualise and quantify the heterogeneous soil matrix of mineral grains, organic matter, air-filled pores and water-filled pores. Additionally, X-ray CT allows visualisation of plant roots in situ without the need for traditional invasive methods such as root washing. However, one routinely unreported aspect of X-ray CT is the potential effect of X-ray dose on the soil-borne microorganisms and plants in rhizosphere investigations. Here we aimed to i) highlight the need for more consistent reporting of X-ray CT parameters for dose to sample, ii) to provide an overview of previously reported impacts of X-rays on soil microorganisms and plant roots and iii) present new data investigating the response of plant roots and microbial communities to X-ray exposure. Fewer than 5% of the 126 publications included in the literature review contained sufficient information to calculate dose and only 2.4% of the publications explicitly state an estimate of dose received by each sample. We conducted a study involving rice roots growing in soil, observing no significant difference between the numbers of root tips, root volume and total root length in scanned versus unscanned samples. In parallel, a soil microbe experiment scanning samples over a total of 24 weeks observed no significant difference between the scanned and unscanned microbial biomass values. We conclude from the literature review and our own experiments that X-ray CT does not impact plant growth or soil microbial populations when employing a low level of dose (<30 Gy). However, the call for higher throughput X-ray CT means that doses that biological samples receive are likely to increase and thus should be closely monitored. |
| publisher |
Public Library of Science |
| publishDate |
2013 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3693932/ |
| _version_ |
1611989799700267008 |