Scheunert I, Topp E, Attar A, Korte F
GSF-Institut für Bodenökologie, Neuherberg, Oberschleissheim, Federal Republic of Germany.
Ecotoxicol Environ Saf. 1994 Feb;27(1):90-104. doi: 10.1006/eesa.1994.1009.
The bioconcentration factors of 14C-labeled chlorinated benzenes in plants from soil were quantified in short-term laboratory experiments and correlated to Kow. The correlation was negative for barley and positive for cress. In order to interpret these opposite results, the log/log correlation between partition coefficients and Kow of the chemicals was established also for each step of the uptake, via both roots and leaves. For the first step of root uptake--the partition of the chemicals from soil solids into soil water--the correlation with Kow was negative, whereas it was positive for the second step, the partition roots/soil water, of both plant species. Similarly, the correlation between the first step of foliar uptake--the partition of the chemical from soil into air--and Kow was negative, and that between the second step--the partition between aerial plant parts and air--and Kow was positive for both plant species. The slopes of the regression lines differed between plant species. It may be concluded that Kow can be used as a parameter to predict the uptake of chemicals from soil by plants only if the same class of chemicals and the same plant species is considered.
在短期实验室实验中对土壤中植物体内¹⁴C标记的氯苯生物富集因子进行了定量，并将其与正辛醇/水分配系数（Kow）相关联。大麦的相关性为负，水芹的相关性为正。为了解释这些相反的结果，还针对通过根和叶吸收的每个步骤，建立了化学物质分配系数与Kow之间的对数/对数相关性。对于根吸收的第一步——化学物质从土壤固体分配到土壤水中——与Kow的相关性为负，而对于两种植物的第二步，即根/土壤水的分配，相关性为正。同样，叶吸收的第一步——化学物质从土壤分配到空气中——与Kow的相关性为负，而第二步——植物地上部分与空气之间的分配——与Kow的相关性对于两种植物均为正。不同植物物种的回归线斜率有所不同。可以得出结论，只有在考虑同一类化学物质和同一植物物种的情况下，Kow才能用作预测植物从土壤中吸收化学物质的参数。
