Arsenic species:: Effects on and accumulation by tomato plants

被引:145
作者
Burló, F [1 ]
Guijarro, I [1 ]
Carbonell-Barrachina, AA [1 ]
Valero, D [1 ]
Martínez-Sánchez, F [1 ]
机构
[1] Univ Miguel Hernandez, Div Tecnol Alimentos, Dept Tecnol Agroalimentaria, Alicante 03312, Spain
关键词
Lycopersicum esculentum; arsenic species; food crop contamination; tomatoes;
D O I
10.1021/jf9806560
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The uptake of arsenic (As) species by Lycopersicum esculentum, growing under soilless culture conditions, was studied. A 4 x 3 x 2 factorial experiment was conducted with four As species (arsenite, arsenate, methylarsonate, and dimethylarsinate), three As concentrations (1, 2, and 5 mg L-l) and two tomato cultivars (Marmande and Muchamiel). The phytoavailability and phytotoxicity were primarily determined by the As species. The concentrations of As in plant increased significantly with increasing As concentration in solution. Both MA and DMA showed a higher upward translocation than arsenite and arsenate, and treatments with MA and DMA clearly reduced plant growth and fruit yield. The As concentration in tomatoes treated with arsenite or arsenate were within the range considered normal in food crops; however, the As concentration in tomatoes treated with MA and DMA were close to or even above the maximum limit. When tomato plants are exposed to high concentrations of As in nutrient solutions, they may uptake As to concentrations unacceptable for human food.
引用
收藏
页码:1247 / 1253
页数:7
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