Foliar uptake of radiocesium from irrigation water by paddy rice (Oryza sativa): an overlooked pathway in contaminated environments

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Foliar uptake of radiocesium from irrigation water by paddy rice (Oryza sativa): an overlooked pathway in contaminated environments. / Uematsu, Shinichiro; Vandenhove, Hildegarde; Sweeck, Lieve; Van Hees, May; Wannijn, Jean; Smolders, Erik.

In: New Phytologist, Vol. 214, No. 2, 20.03.2017, p. 820-829.

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@article{4b43cc3639a64a53a687c3a87f1c7e8a,
title = "Foliar uptake of radiocesium from irrigation water by paddy rice (Oryza sativa): an overlooked pathway in contaminated environments",
abstract = "•Flooded (paddy) rice (Oryza sativa) can take up ions from the irrigation water by foliar uptake via the exposed stem base. We hypothesised that the stem base uptake of radiocaesium (RCs) is a pathway for rice grown in RCs-contaminated environments.•We developed a bi-compartmental device which discriminates the stem base from root RCs uptake from solutions, thereby using RCs isotopes (137Cs and 134Cs) with < 2% solution leak between the compartments.•Radiocaesium uptake was linear over time (0–24 h). Radiocaesium uptake to the entire plant, expressed per dry weight of the exposed parts, was sixfold higher for the roots than for the exposed stem base. At equal RCs concentrations in both compartments, the exposed stem base and root uptake contributed almost equally to the total shoot RCs concentrations. Reducing potassium supply to the roots not only increased the root RCs uptake but also increased RCs uptake by the stem base.•This study was the first to experimentally demonstrate active and internally regulated RCs uptake by the stem base of rice. Scenario calculations for the Fukushima-affected area predict that RCs in irrigation water could be an important source of RCs in rice as indirectly suggested from field data.",
keywords = "foliar uptake, Oryza sativa (rice), potassium, radiocaesium, root uptake, stem base, translocation",
author = "Shinichiro Uematsu and Hildegarde Vandenhove and Lieve Sweeck and {Van Hees}, May and Jean Wannijn and Erik Smolders",
note = "Score=10",
year = "2017",
month = mar,
day = "20",
doi = "10.1111/nph.14416",
language = "English",
volume = "214",
pages = "820--829",
journal = "New Phytologist",
issn = "1469-8137",
publisher = "Wiley - John Wiley & Sons, Ltd",
number = "2",

}

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TY - JOUR

T1 - Foliar uptake of radiocesium from irrigation water by paddy rice (Oryza sativa): an overlooked pathway in contaminated environments

AU - Uematsu, Shinichiro

AU - Vandenhove, Hildegarde

AU - Sweeck, Lieve

AU - Van Hees, May

AU - Wannijn, Jean

AU - Smolders, Erik

N1 - Score=10

PY - 2017/3/20

Y1 - 2017/3/20

N2 - •Flooded (paddy) rice (Oryza sativa) can take up ions from the irrigation water by foliar uptake via the exposed stem base. We hypothesised that the stem base uptake of radiocaesium (RCs) is a pathway for rice grown in RCs-contaminated environments.•We developed a bi-compartmental device which discriminates the stem base from root RCs uptake from solutions, thereby using RCs isotopes (137Cs and 134Cs) with < 2% solution leak between the compartments.•Radiocaesium uptake was linear over time (0–24 h). Radiocaesium uptake to the entire plant, expressed per dry weight of the exposed parts, was sixfold higher for the roots than for the exposed stem base. At equal RCs concentrations in both compartments, the exposed stem base and root uptake contributed almost equally to the total shoot RCs concentrations. Reducing potassium supply to the roots not only increased the root RCs uptake but also increased RCs uptake by the stem base.•This study was the first to experimentally demonstrate active and internally regulated RCs uptake by the stem base of rice. Scenario calculations for the Fukushima-affected area predict that RCs in irrigation water could be an important source of RCs in rice as indirectly suggested from field data.

AB - •Flooded (paddy) rice (Oryza sativa) can take up ions from the irrigation water by foliar uptake via the exposed stem base. We hypothesised that the stem base uptake of radiocaesium (RCs) is a pathway for rice grown in RCs-contaminated environments.•We developed a bi-compartmental device which discriminates the stem base from root RCs uptake from solutions, thereby using RCs isotopes (137Cs and 134Cs) with < 2% solution leak between the compartments.•Radiocaesium uptake was linear over time (0–24 h). Radiocaesium uptake to the entire plant, expressed per dry weight of the exposed parts, was sixfold higher for the roots than for the exposed stem base. At equal RCs concentrations in both compartments, the exposed stem base and root uptake contributed almost equally to the total shoot RCs concentrations. Reducing potassium supply to the roots not only increased the root RCs uptake but also increased RCs uptake by the stem base.•This study was the first to experimentally demonstrate active and internally regulated RCs uptake by the stem base of rice. Scenario calculations for the Fukushima-affected area predict that RCs in irrigation water could be an important source of RCs in rice as indirectly suggested from field data.

KW - foliar uptake

KW - Oryza sativa (rice)

KW - potassium

KW - radiocaesium

KW - root uptake

KW - stem base

KW - translocation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/22787249

U2 - 10.1111/nph.14416

DO - 10.1111/nph.14416

M3 - Article

VL - 214

SP - 820

EP - 829

JO - New Phytologist

JF - New Phytologist

SN - 1469-8137

IS - 2

ER -

ID: 2324844