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Article

Metabolomic Response of the Creeping Wood Sorrel Oxalis corniculata to Low-Dose Radiation Exposure from Fukushima’s Contaminated Soil

1
The BCPH Unit of Molecular Physiology, Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan
2
Center for Research Advancement and Collaboration, University of the Ryukyus, Okinawa 903-0213, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Fabrizio Ambrosino and Supitcha Chanyotha
Life 2021, 11(9), 990; https://doi.org/10.3390/life11090990
Received: 17 August 2021 / Revised: 15 September 2021 / Accepted: 17 September 2021 / Published: 20 September 2021
(This article belongs to the Special Issue Radioactive Pollution and Biological Effects of Radioactivity)
The biological consequences of the Fukushima nuclear accident have been intensively studied using the pale grass blue butterfly Zizeeria maha and its host plant, the creeping wood sorrel Oxalis corniculata. Here, we performed metabolomic analyses of Oxalis leaves from Okinawa to examine the plant metabolites that were upregulated or downregulated in response to low-dose radiation exposure from Fukushima’s contaminated soil. The cumulative dose of radiation to the plants was 5.7 mGy (34 μGy/h for 7 days). The GC-MS analysis revealed a systematic tendency of downregulation among the metabolites, some of which were annotated as caproic acid, nonanoic acid, azelaic acid, and oleic acid. Others were annotated as fructose, glucose, and citric acid, involved in the carbohydrate metabolic pathways. Notably, the peak annotated as lauric acid was upregulated. In contrast, the LC-MS analysis detected many upregulated metabolites, some of which were annotated as either antioxidants or stress-related chemicals involved in defense pathways. Among them, only three metabolite peaks had a single annotation, one of which was alfuzosin, an antagonist of the α1-adrenergic receptor. We conclude that this Oxalis plant responded metabolically to low-dose radiation exposure from Fukushima’s contaminated soil, which may mediate the ecological “field effects” of the developmental deterioration of butterflies in Fukushima. View Full-Text
Keywords: metabolome; GC-MS; LC-MS; Fukushima nuclear accident; low-dose radiation exposure; plant physiology; Oxalis corniculata; radioactive pollution; field effect; alfuzosin metabolome; GC-MS; LC-MS; Fukushima nuclear accident; low-dose radiation exposure; plant physiology; Oxalis corniculata; radioactive pollution; field effect; alfuzosin
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MDPI and ACS Style

Sakauchi, K.; Taira, W.; Otaki, J.M. Metabolomic Response of the Creeping Wood Sorrel Oxalis corniculata to Low-Dose Radiation Exposure from Fukushima’s Contaminated Soil. Life 2021, 11, 990. https://doi.org/10.3390/life11090990

AMA Style

Sakauchi K, Taira W, Otaki JM. Metabolomic Response of the Creeping Wood Sorrel Oxalis corniculata to Low-Dose Radiation Exposure from Fukushima’s Contaminated Soil. Life. 2021; 11(9):990. https://doi.org/10.3390/life11090990

Chicago/Turabian Style

Sakauchi, Ko, Wataru Taira, and Joji M. Otaki. 2021. "Metabolomic Response of the Creeping Wood Sorrel Oxalis corniculata to Low-Dose Radiation Exposure from Fukushima’s Contaminated Soil" Life 11, no. 9: 990. https://doi.org/10.3390/life11090990

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