Nutrient uptake and partitioning in rice plant under excessive Fe<sup>2+</sup> stress
Solution culture was carried out to study the uptake and partitioning of nutrients in rice plant under excessive Fe<sup>2+</sup> stress. The results indicated that excessive Fe<sup>2+</sup> stress reduced N, P and Mg absorption but enhanced Cu absorption. Fe<sup>2+</...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2003-05-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2003.03.0305 |
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| Summary: | Solution culture was carried out to study the uptake and partitioning of nutrients in rice plant under excessive Fe<sup>2+</sup> stress. The results indicated that excessive Fe<sup>2+</sup> stress reduced N, P and Mg absorption but enhanced Cu absorption. Fe<sup>2+</sup> increased the absorption of Ca and Mn at 50 and 150 Fe<sup>2+</sup> mg/kg levels, whereas reduced their uptake at Fe<sup>2+</sup> levels higher than 150 mg/kg. The concentration of Fe, Cu and Zn in roots were higher than those in shoots. Excessive Fe<sup>2+</sup> stress inhibited translocation of nutrients, e. g. P, K, Ca and Mg, from roots to shoots, resulting in nutrient distribution imbalance between shoot and root, which, in turn, caused more sever iron toxicity. Iron toxicity of rice might be ascribed partially to the disturbance of nutrient distribution between shoots and roots brought about by the excessive Fe<sup>2+</sup> stress. |
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| ISSN: | 1008-9209 2097-5155 |