Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field
The effect of soil exchangeable (plant-available) potassium (ExK) content on cesium (Cs) absorption and translocation in buckwheat was evaluated in a field contaminated with radioactive Cs (134Cs and 137Cs, RCs) in 2013. The RCs concentration in buckwheat was significantly positively correlated with...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-10-01
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| Series: | Plant Production Science |
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| Online Access: | http://dx.doi.org/10.1080/1343943X.2017.1355737 |
| _version_ | 1819015479830773760 |
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| author | Katashi Kubo Shigeto Fujimura Hiroyuki Kobayashi Takeshi Ota Takuro Shinano |
| author_facet | Katashi Kubo Shigeto Fujimura Hiroyuki Kobayashi Takeshi Ota Takuro Shinano |
| author_sort | Katashi Kubo |
| collection | DOAJ |
| description | The effect of soil exchangeable (plant-available) potassium (ExK) content on cesium (Cs) absorption and translocation in buckwheat was evaluated in a field contaminated with radioactive Cs (134Cs and 137Cs, RCs) in 2013. The RCs concentration in buckwheat was significantly positively correlated with the naturally occurring stable Cs (133Cs, SCs) concentration, and was lower at higher soil ExK content. The RCs and SCs were actively absorbed by buckwheat until the flowering stage. The soil ExK content was significantly negatively correlated with soil exchangeable RCs and SCs (ExRCs and ExSCs) concentrations. Greater RCs and SCs absorption by buckwheat in soils with low ExK contents was mainly due to higher soil ExRCs and ExSCs concentrations. Reproductive organs showed the largest differences in SCs concentration between low-ExK and high-ExK plots. The root–shoot and shoot–reproductive organs translocations of SCs markedly decreased with increasing soil ExK content. In the root–shoot and shoot–reproductive organs translocations, the discrimination of SCs and K decreased with decreasing soil ExK content. Our main findings were as follows: (1) because RCs are mainly taken up at the earlier growth stage, potassium should be applied as a basal fertilizer to decrease the RCs concentration in buckwheat; (2) lower soil ExK content led to higher soil ExRCs concentrations, resulting in greater RCs absorption by buckwheat; (3) the high Cs absorption and translocation and weaker discrimination between Cs and K in low ExK content soil may be due to the expression of K transporter(s) with weak discrimination between Cs and K. |
| first_indexed | 2024-12-21T02:32:24Z |
| format | Article |
| id | doaj.art-d1c05adea2014028b1740ac9962490d0 |
| institution | Directory Open Access Journal |
| issn | 1343-943X 1349-1008 |
| language | English |
| last_indexed | 2024-12-21T02:32:24Z |
| publishDate | 2017-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Production Science |
| spelling | doaj.art-d1c05adea2014028b1740ac9962490d02022-12-21T19:18:53ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082017-10-0120439640510.1080/1343943X.2017.13557371355737Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated fieldKatashi Kubo0Shigeto Fujimura1Hiroyuki Kobayashi2Takeshi Ota3Takuro Shinano4National Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research CenterNational Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research CenterNARO Central Region Agricultural Research CenterNational Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research CenterNational Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research CenterThe effect of soil exchangeable (plant-available) potassium (ExK) content on cesium (Cs) absorption and translocation in buckwheat was evaluated in a field contaminated with radioactive Cs (134Cs and 137Cs, RCs) in 2013. The RCs concentration in buckwheat was significantly positively correlated with the naturally occurring stable Cs (133Cs, SCs) concentration, and was lower at higher soil ExK content. The RCs and SCs were actively absorbed by buckwheat until the flowering stage. The soil ExK content was significantly negatively correlated with soil exchangeable RCs and SCs (ExRCs and ExSCs) concentrations. Greater RCs and SCs absorption by buckwheat in soils with low ExK contents was mainly due to higher soil ExRCs and ExSCs concentrations. Reproductive organs showed the largest differences in SCs concentration between low-ExK and high-ExK plots. The root–shoot and shoot–reproductive organs translocations of SCs markedly decreased with increasing soil ExK content. In the root–shoot and shoot–reproductive organs translocations, the discrimination of SCs and K decreased with decreasing soil ExK content. Our main findings were as follows: (1) because RCs are mainly taken up at the earlier growth stage, potassium should be applied as a basal fertilizer to decrease the RCs concentration in buckwheat; (2) lower soil ExK content led to higher soil ExRCs concentrations, resulting in greater RCs absorption by buckwheat; (3) the high Cs absorption and translocation and weaker discrimination between Cs and K in low ExK content soil may be due to the expression of K transporter(s) with weak discrimination between Cs and K.http://dx.doi.org/10.1080/1343943X.2017.1355737Cs accumulationdiscriminationFagopyrum esculentum MoenchFukushimaradionuclide |
| spellingShingle | Katashi Kubo Shigeto Fujimura Hiroyuki Kobayashi Takeshi Ota Takuro Shinano Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field Plant Production Science Cs accumulation discrimination Fagopyrum esculentum Moench Fukushima radionuclide |
| title | Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field |
| title_full | Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field |
| title_fullStr | Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field |
| title_full_unstemmed | Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field |
| title_short | Effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium-contaminated field |
| title_sort | effect of soil exchangeable potassium content on cesium absorption and partitioning in buckwheat grown in a radioactive cesium contaminated field |
| topic | Cs accumulation discrimination Fagopyrum esculentum Moench Fukushima radionuclide |
| url | http://dx.doi.org/10.1080/1343943X.2017.1355737 |
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