期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 145, 期 -, 页码 150-160出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2017.07.028
关键词
BPA; Net photosynthetic rate; Stomatal factor; Non-stomatal factor; Soybean seedling
资金
- Natural Science Foundation of China [21371100, 31170477, 21501068]
- National Water Pollution Control and Management Technology Major Project [2012ZX07101_013]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Research and Innovation Project for Postgraduate of Higher Education Institutions of Jiangsu Province [KYLX15_1189, KYLX15_1164]
Bisphenol A (BPA) is an emerging environmental endocrine disruptor that has toxic effects on plants growth. Photosynthesis supplies the substances and energy required for plant growth, and regulated by stomatal and non-stomatal factors. Therefore, in this study, to reveal how BPA affects photosynthesis in soybean seedlings (Glycine max L.) from the perspective of stomatal and non-stomatal factors, the stomatal factors (stomatal conductance and behaviours) and non-stomatal factors (Hill reaction, apparent quantum efficiency, Rubisco activity, carboxylation efficiency, the maximum Rubisco carboxylation velocity, ribulose-1,5-bisphospate regeneration capacities mediated by maximum electron transport rates, and triose phosphate utilization rate) were investigated using a portable photosynthesis system. Moreover, the pollution of BPA in the environment was simulated. The results indicate that low-dose EPA enhanced net photosynthetic rate (1).) primarily by promoting stomatal factors, resulting in increased relative growth rates and accelerated soybean seedling growth. High-dose BPA decreases the Pn by simultaneously inhibiting stomatal and non-stomatal factors, and this inhibition decreases the relative growth rates further reducing soybean seedling growth. Following the withdrawal of BPA, all of the indices were restored to varying degrees. In conclusion, low-dose BPA increased the Pn by promoting stomatal factors while high-dose BPA decreased the Pn by simultaneously inhibiting stomatal and non-stomatal factors. These findings provide a model (or, hypothesis) for the effects of BPA on plant photosynthesis.
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