Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, 50 Zhongling Street, Nanjing, 210014, China; Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China.
Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, 50 Zhongling Street, Nanjing, 210014, China; Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China.
Chemosphere. 2020 Jun;249:126457. doi: 10.1016/j.chemosphere.2020.126457. Epub 2020 Mar 12.
In this study, we investigated the accumulation and transport patterns of six phthalic acid esters (PAEs) in two leafy vegetables under hydroponic conditions. The tested PAEs included dibutyl phthalate (DBP), diethyl phthalate (DEP), diallyl phthalate (DAP), diisobutyl phthalate (DIBP), dimethyl phthalate (DMP) and benzyl butyl phthalate (BBP), and the tested vegetables included Gaogengbai and Ziyoucai. The results revealed that the six PAEs were taken up by vegetables from the solution, although their accumulation and distribution varied among PAEs. The ability of concentrating PAEs into the roots followed the order of BBP > DBP > DIBP > DAP > DEP > DMP, whereas the ability of concentrating PAEs in plant shoots had the opposite order. By analysing the fractionation of the six PAEs in vegetable roots, DMP had the largest proportion in terms of apoplastic movement, while BBP had the largest proportion in terms of symplastic movement. Correlation analyses revealed that the differences among the accumulation and distribution behaviours of the six PAEs in plant tissues were not only related to their physicochemical parameters, such as alkyl chain length and the octanol/water partition coefficient (logK), but also related to the proportion of apoplastic and symplastic movement in the plant roots. In addition, PAEs were more readily accumulated in the Gaogengbai roots than in the Ziyoucai roots; however, the opposite trend was observed for the shoots.
在这项研究中，我们在水培条件下研究了两种叶菜类蔬菜中六种邻苯二甲酸酯（PAEs）的积累和迁移模式。测试的 PAEs 包括邻苯二甲酸二丁酯（DBP）、邻苯二甲酸二乙酯（DEP）、邻苯二甲酸二烯丙酯（DAP）、邻苯二甲酸二异丁酯（DIBP）、邻苯二甲酸二甲酯（DMP）和邻苯二甲酸丁基苄基酯（BBP），测试的蔬菜包括高梗白菜和紫菜薹。结果表明，六种 PAEs 均被蔬菜从溶液中吸收，但它们的积累和分布在 PAEs 之间存在差异。将 PAEs 浓缩到根部的能力顺序为 BBP > DBP > DIBP > DAP > DEP > DMP，而将 PAEs 浓缩到植物地上部分的能力则相反。通过分析蔬菜根部六种 PAEs 的分级，DMP 在质外体运动中的比例最大，而 BBP 在共质体运动中的比例最大。相关分析表明，六种 PAEs 在植物组织中的积累和分布行为的差异不仅与它们的物理化学参数（如烷基链长度和辛醇/水分配系数（logK））有关，还与植物根部质外体和共质体运动的比例有关。此外，PAEs 更容易在高梗白菜的根部积累，而在紫菜薹的根部则相反；然而，对于地上部分则相反。
