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蜈蚣草中砷与磷\钾\钙等营养元素的交互作用
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【农林学 教育论文下载】摘要砷污染对植物、动物和人体均产生毒害作用。研究砷元素与磷、钾、钙等元素的交互作用,结果表明:在蜈蚣草体内磷的浓度会随着培养液中砷浓度的增加而增加,两者并不存在拮抗关系;蜈蚣草羽叶表皮细胞中砷和钾浓度呈显著正相关;蜈蚣草中砷的累积量会同时受介质中砷水平和钙水平的限制。在提高介质中的砷浓度时,蜈蚣草根部的镁浓度逐渐降低,但对叶柄和羽叶中的镁浓度无显著影响。 关键词砷;营养元素;交互作用;蜈蚣草 AbstractArsenic pollution has poisoning effect on plant,animal and human being.The interaction between arsenic and phosphorus、potassium,calcium and other elements was studied.The results showed that:in Pteris vittata L.,phosphate concentration increased with the increasing of arsenic concentration of culture medium;there was no antagonism relationship between them,but there was significant positive correlation between the phosphate concentration of potassium concentralion in leaf epidermal cells;besides the phosphate accumulation was limited by the level of phosphate and calcium. The magnesium concentration of root decreased with the increaseing of phosphate concentration
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