Cultivar-Dependent Accumulation and Translocation of Perfluorooctanesulfonate among Lettuce ( Lactuca sativa L.) Cultivars Grown on Perfluorooctanesulfonate-Contaminated Soil.
Cultivar-Dependent Accumulation and Translocation of Perfluorooctanesulfonate among Lettuce ( Lactuca sativa L.) Cultivars Grown on Perfluorooctanesulfonate-Contaminated Soil.
复制标题
DOI：
10.1021/acs.jafc.8b04548
复制
发表时间：
2018-11
影响因子：
6.1
通讯作者：
Peng-fei Yu;L. Xiang;Xin-Hong Li;Zi-Rong Ding;C. Mo;Yan-Wen Li;Hui Li;Q. Cai;Dong-mei Zhou;M. Wong
中科院分区：
文献类型：
--
作者：
Peng-fei Yu;L. Xiang;Xin-Hong Li;Zi-Rong Ding;C. Mo;Yan-Wen Li;Hui Li;Q. Cai;Dong-mei Zhou;M. Wong
全氟辛烷磺酸（PFOS）是一种有毒的持久性有机污染物，可在农业土壤中广泛检测到。在这项研究中，两个生菜品种的低PFOS积累筛选出来的，以减少通过蔬菜消费的PFOS对人体的暴露。尽管种植在全氟辛烷磺酸高度污染的土壤（1.0毫克/千克）中，筛选出的低全氟辛烷磺酸品种仍有助于确保食品安全，因为它们对全氟辛烷磺酸具有高度耐受性，其地上部全氟辛烷磺酸浓度比高全氟辛烷磺酸品种低4.4-5.7倍。蛋白质含量和蛋白质介导的蒸腾作用在调节供试生菜品种中的全氟辛烷磺酸积累方面发挥了关键作用。较低的蛋白质含量、较低的气孔导度和较低的蒸腾速率导致全氟辛烷磺酸累积量较低。本研究从生理生化水平揭示了生菜品种低PFOS积累的形成机制，为开发经济高效、安全的PFOS污染土壤蔬菜种植技术奠定了基础。
Perfluorooctanesulfonate (PFOS) is a toxic and persistent organic pollutant that can be widely detected in agricultural soils. In this study, two lettuce cultivars with low PFOS accumulation were screened out to reduce the exposure of PFOS to the human body via vegetable consumption. The screened low-PFOS cultivars may help to ensure food safety, despite planting in highly PFOS-polluted soils (1.0 mg/kg), due to their high tolerance to PFOS and 4.4-5.7 times lower shoot PFOS concentration than the high-PFOS cultivars. Protein content and protein-mediated transpiration played key roles in regulating PFOS accumulation in the lettuce cultivars tested. Lower protein content, lower stomatal conductance, and lower transpiration rate resulted in low PFOS accumulation. This study reveals the mechanism of forming low-PFOS accumulation of lettuce cultivars at physiological and biochemical levels and lays a foundation for developing a cost-effective and safe approach to grow vegetables in PFOS-polluted soils.