Abstract
Bisphenol A (BPA) is a ubiquitous endocrine-disrupting chemical in the environment that exerts potential harm to plants. Phytohormones play important roles both in regulating multiple aspects of plant growth and in plants’ responses to environmental stresses. But how BPA affects plant growth by regulating endogenous hormones remains poorly understood. Here, we found that treatment with 1.5 mg L−1 BPA improved the growth of soybean seedlings, companied by increases in the contents of indole-3-acetic acid (IAA) and zeatin (ZT), and decreases in the ratios of abscisic acid (ABA)/IAA, ABA/gibberellic acid (GA), ABA/ZT, ethylene (ETH)/GA, ETH/IAA, and ETH/ZT. Treatment with higher concentrations of BPA (from 3 to 96 mg L−1) inhibited the growth of soybean seedlings, meanwhile, decreased the contents of IAA, GA, ZT, and ETH, and increased the content of ABA and the ratios of ABA/IAA, ABA/GA, ABA/ZT, ETH/GA, ETH/IAA, and ETH/ZT. The increases in the ratios of growth and stress hormones were correlated with the increase in the BPA content of the roots. Thus, BPA could affect plant growth through changing the levels of single endogenous hormone and the ratios of growth and stress hormones in the roots because of BPA absorption by the roots.
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Acknowledgments
This work was financially supported through the National Natural Science Foundation of China (31170477), Jiangsu Province (BK2011160), Innovation Project for Postgraduates of Jiang University, and the Research and Innovation Project for Postgraduates of Higher Education Institutions of Jiangsu Province (CXLX13_749).
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Responsible editor: Henner Hollert
Shengman Wang and Lihong Wang contributed equally to this work.
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Wang, S., Wang, L., Hua, W. et al. Effects of bisphenol A, an environmental endocrine disruptor, on the endogenous hormones of plants. Environ Sci Pollut Res 22, 17653–17662 (2015). https://doi.org/10.1007/s11356-015-4972-y
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DOI: https://doi.org/10.1007/s11356-015-4972-y