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.

中文翻译：

---

在全氟辛烷磺酸污染土壤上生长的莴苣品种中，全氟辛烷磺酸的品种依赖累积和转运

全氟辛烷磺酸盐（PFOS）是一种有毒且持久的有机污染物，可以在农业土壤中广泛检测到。在这项研究中，筛选出两个低全氟辛烷磺酸累积的生菜品种，以减少通过食用蔬菜而使全氟辛烷磺酸对人体的暴露。尽管在高全氟辛烷磺酸污染的土壤（1.0 mg / kg）上种植，但筛选后的低全氟辛烷磺酸品种可能有助于确保食品安全，因为它们对全氟辛烷磺酸具有较高的耐受性，且其高全氟辛烷磺酸含量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生菜品种中的PFOS积累中起关键作用。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低全氟辛烷磺酸积累。