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| Accumulation and Chemical Forms of Vanadium in Different Rice Cultivars |
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| KeyWord:rice; vanadium; accumulation; chemical forms |
| Author Name | Affiliation | | HOU Ming | Guangxi Scientific Experiment Center of Mixing. Metallurgy and Environment, College of Chemistry and Bioengineering, Guilin University of Technology | | GUO Ling | Guangxi Scientific Experiment Center of Mixing. Metallurgy and Environment, College of Chemistry and Bioengineering, Guilin University of Technology | | HE Jian-liang | Guangxi Scientific Experiment Center of Mixing. Metallurgy and Environment, College of Chemistry and Bioengineering, Guilin University of Technology |
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| Abstract: |
| Accumulation and chemical forms of vanadium in two rice cultivars were investigated by pot experiment. It suggested that the V distribution levels in organs of two rice cultivars was in sequence as follows：root>stem >leaf>seed（rice grain）. V was accumulated mainly in roots. V concentrations in organs of the 188 species were lower than that in the 838 species. During stages of stooling, flowering, pustulation and maturation, V concentrations in root of the 188 species were 73.10 μg·g-1, 92.56 μg·g-1, 57.46 μg·g-1 and 57.81 μg·g-1 respectively, in stem and leaf were 8.79 μg·g-1, 4.52 μg·g-1, 2.13 μg·g-1 and 2.56 μg·g-1 respectively, when V stress level was 100 mg·kg-1. Meanwhile V concentrations in root of the 838 species were 59.14 μg·g-1, 94.93 μg·g-1, 88.59 μg·g-1 and 89.70 μg·g-1 respectively, and in stem and leaf were 4.64 μg·g-1, 3.66 μg·g-1, 2.29 μg·g-1 and 3.24 μg·g-1 respectively. It indicates that the 838 species has stronger V accumulation ability. V speciation in roots of the 2 rice cultivars were mainly in the chemical forms of HCl extractable（FHCl） and HAc extractable（FHAc）, but they were in the chemical forms of HCl extractable（FHCl） and water extractable（FW） in stems and leaves. It suggests that most V uptake into root was combined as phosphate or oxalate, which restricts its transportation from root to stem and leaf, and prevents V damaging to plant photosynthesis and other physiological process. |
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