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| Effects of Phosphorous-containing Substances on Growth and Phosphorous and Lead Uptake of Lead-Tolerant and Sensitive Plants |
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| KeyWord:phosphorous-containing substance; kale; Chinese cabbage; lead; root surface |
| Author Name | Affiliation | | LI Wei-li | School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 | | FANG Yue-ying | School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 | | ZHAO Ling | School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 | | CAO Xin-de | School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 |
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| Abstract: |
| Lead-tolerant plant kale（Brassica capitata） and Pb-sensitive plant Chinese cabbage（Brassica chinensis） were exposed to nutrient solution containing Pb to examine the transformation of Pb on root surface and Pb uptake by plants after adding phosphate rock tailing（PR）, triple superphosphate fertilizer（TSP） and their combination（P+T） to the solution. Applying phosphorous-containing substances enhanced phosphorous uptake in roots and shoot of Chinese cabbage and roots of kale, with effects being TSP＞P+T＞PR, but had no effect on shoot phosphorous in kale. Lead concentrations in roots of tolerant kale were reduced, but those in shoot were not significantly affected by additions of phosphorous-containing substances. For Chinese cabbage, PR and P+T treatments had little effect on Pb concentrations in both root and shoot, while applying TSP enhanced Pb uptake. Additions of phosphorous-containing substances induced formations of Pb5（PO4）3Cl and Pb5（PO4）3OH on the surface of plant roots. However, this was in no position to directly reduce Pb absorption by plants. |
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