Department of Environmental Engineering, College of Biology and Environment, Nanjing Forestry University, Nanjing, 210037, China.
Department of Environmental Engineering, College of Biology and Environment, Nanjing Forestry University, Nanjing, 210037, China.
Environ Pollut. 2020 Nov;266(Pt 1):115385. doi: 10.1016/j.envpol.2020.115385. Epub 2020 Aug 9.
Bioaccumulation and toxicity of per-and polyfluoroalkyl substances and metal in plants have been confirmed, however their contamination in soil and plants still requires extensive investigation. In this study the combined effects of chlorinated polyfluoroalkyl ether potassium sulfonate (F53B) and chromium (Cr) on water spinach (Ipomoea aquatica Forsk) were investigated. Compared with each single stress, the combination of F53B and Cr (VI) reduced the biomass and height and increasingly accumulated in the roots and destroyed the cell structure. Besides, the co-contamination led to the immobilization of F53B and Cr (VI) in soil, which affected their migration in soil and transfer to plants. The antioxidant response and photosynthesis of the plant weakened under the single Cr (VI) and enhanced under the single F53B treatment; however the contamination of F53B and Cr (VI) could also reduce this effect, as confirmed by the gene expression of MTa, psbA and psbcL genes. This study provides an evidence of the environmental risks resulting from the coexistence of F53B and Cr (VI).
已证实多氟和全氟烷基物质以及金属在植物体内的生物累积和毒性，但它们在土壤和植物中的污染仍需要广泛调查。本研究调查了氯化聚全氟烷基醚硫酸钾（F53B）和铬（Cr）对蕹菜（Ipomoea aquatica Forsk）的联合作用。与单一胁迫相比，F53B 和 Cr（VI）的组合降低了蕹菜的生物量和高度，并在根部不断积累，破坏了细胞结构。此外，复合污染导致 F53B 和 Cr（VI）在土壤中固定，影响了它们在土壤中的迁移和向植物的转移。在单一 Cr（VI）处理下，植物的抗氧化反应和光合作用减弱，而在单一 F53B 处理下增强；然而，F53B 和 Cr（VI）的污染也可能降低这种效应，这从 MTa、psbA 和 psbcL 基因的表达得到了证实。本研究为 F53B 和 Cr（VI）共存所带来的环境风险提供了证据。
