State Key Laboratory of Food Science and Technology, Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.
State Key Laboratory of Food Science and Technology, Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Cooperative Innovation Center of Water Treatment Technology and Materials, Suzhou University of Science and Technology, Suzhou 215009, China.
Ecotoxicol Environ Saf. 2018 Aug 15;157:463-471. doi: 10.1016/j.ecoenv.2018.04.013. Epub 2018 Apr 12.
Bisphenol A (BPA) is an endocrine disruptor that is ubiquitous in the environment. Previous studies have focused on the effects of BPA on plants to assess the ecological risk of BPA in the environment. To evaluate the effects of BPA on plant biological characters more systematically, we investigated the biological characters of above-ground and under-ground organs of soybean plants exposed to BPA. Meanwhile, the mechanisms for the observed changes were also analyzed from the view of hormone levels and photosynthesis. The results showed that after exposure to 0.8 mg L BPA for three days, indole-3-acetic acid (IAA) and gibberellic acid levels in roots increased significantly, and the IAA level increased in leaves, so the character indices of roots and leaves both increased. The IAA and ethylene levels in stems increased, but the character indices of stems did not increased. With higher BPA concentrations, especially exposure to 17.2 mg L BPA, the levels of IAA, gibberellic acid, and zeatin decreased (except for the increased zeatin in leaves), and abscisic acid and ethylene levels increased; thus, all of the character indices significantly decreased. By comparing the changes in various biological characters, we found that leaf area, root surface area, and root length changed most significantly. In addition, changes in photosynthetic parameters provided initial causes for plant growth changes, and impacted biological characters. The changes of character indices were stronger when the BPA exposure time was prolonged, and after the removal of BPA, the character indices showed some recovery. Therefore, BPA exposure can regulate the changes in plant characters by influencing hormone levels and photosynthesis, and root surface area, root length, and leaf area were the most sensitive to BPA.
双酚 A（BPA）是一种环境中普遍存在的内分泌干扰物。先前的研究集中在 BPA 对植物的影响上，以评估环境中 BPA 的生态风险。为了更系统地评估 BPA 对植物生物学特性的影响，我们研究了暴露于 BPA 的大豆植株地上和地下器官的生物学特性。同时，还从激素水平和光合作用的角度分析了观察到的变化的机制。结果表明，暴露于 0.8mg/L BPA 三天后，根中吲哚-3-乙酸（IAA）和赤霉素水平显著增加，叶片中 IAA 水平增加，因此根和叶的特征指数均增加。茎中 IAA 和乙烯水平增加，但茎的特征指数没有增加。随着 BPA 浓度的增加，特别是暴露于 17.2mg/L BPA，IAA、赤霉素和玉米素的水平降低（除叶片中增加的玉米素外），脱落酸和乙烯水平增加；因此，所有特征指数均显著降低。通过比较各种生物学特性的变化，我们发现叶面积、根表面积和根长变化最为显著。此外，光合参数的变化为植物生长变化提供了初步原因，并影响了生物学特性。随着 BPA 暴露时间的延长，特征指数的变化更强，BPA 去除后，特征指数显示出一些恢复。因此，BPA 暴露可以通过影响激素水平和光合作用来调节植物特征的变化，根表面积、根长和叶面积对 BPA 最为敏感。
