State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.
Environ Toxicol Chem. 2013 Jan;32(1):174-80. doi: 10.1002/etc.2042. Epub 2012 Nov 23.
Bisphenol A (BPA) is an environmental endocrine disruptor that seriously threatens ecological systems. Plants are the primary producers in ecological systems, but little information is available concerning the toxic effect of BPA on plants. In the present study, the effects of BPA on the growth and nitrogen nutrition of roots of soybean seedlings were investigated by using a root automatic scan apparatus and biochemical methods. It was found that when soybean seedlings were treated with 1.5 mg/L BPA, the growth of roots was improved, the content of nitrate in roots was increased, the content of ammonium in roots was decreased, and the activities of nitrate reductase and nitrite reductase in roots were not changed. The opposite effects were observed in roots treated with 17.2 mg/L and 50.0 mg/L BPA, except for an increase in the content of nitrate in roots treated with 17.2 mg/L BPA and a decrease in the activities of nitrate reductase and nitrite reductase in roots of soybeans seedlings. Statistical analysis indicated that the change in the nitrogen nutrition of roots of soybean seedlings treated with BPA was one reason why the growth of roots was changed. The authors suggest that the potential environmental and ecological risk of BPA to plants should receive more consideration.
双酚 A（BPA）是一种环境内分泌干扰物，严重威胁着生态系统。植物是生态系统中的主要生产者，但关于 BPA 对植物的毒性作用的信息却很少。在本研究中，利用根自动扫描装置和生化方法研究了 BPA 对大豆幼苗根生长和氮营养的影响。结果发现，当大豆幼苗用 1.5mg/L 的 BPA 处理时，根的生长得到了改善，根中硝酸盐的含量增加，根中铵的含量减少，根中硝酸还原酶和亚硝酸还原酶的活性没有改变。当用 17.2mg/L 和 50.0mg/L 的 BPA 处理时，观察到相反的效果，除了 17.2mg/L 的 BPA 处理增加了根中硝酸盐的含量和降低了大豆幼苗根中硝酸还原酶和亚硝酸还原酶的活性。统计分析表明，BPA 处理后大豆幼苗根氮营养的变化是导致根生长变化的原因之一。作者建议，应更多地考虑 BPA 对植物的潜在环境和生态风险。
