Abstract
Although the specific mechanisms are not completely understood, plant uptake of most xenobiotic organic compounds is believed to be a passive process related at least in part to the lipophilicity of the compound. The transpiration stream concentration factor (TSCF), a ratio of xylem to root-zone solution concentrations, is one of the most widely used descriptors in plant uptake modeling. Unfortunately, experimentally determined TSCF values are extremely limited and TSCF used in modeling efforts are often estimated from empirically derived bell-shaped curves that relate TSCF to the log octanol/water partition coefficient (Kow). The shape of the curve implies that there is an optimal
lipophilicity for uptake and translocation and compounds that are highly polar are not expected to be significantly translocated.However, recent experimental
uptake data generated for highly water-soluble and water miscible compounds
(e.g.. sulfolane, 1,4- dioxane, MTBE) suggest that this relationship may not be appropriate. An alternative TSCF-log Kow relationship in combination with a refined model for predicting uptake and accumulation in edible fruits.
lipophilicity for uptake and translocation and compounds that are highly polar are not expected to be significantly translocated.However, recent experimental
uptake data generated for highly water-soluble and water miscible compounds
(e.g.. sulfolane, 1,4- dioxane, MTBE) suggest that this relationship may not be appropriate. An alternative TSCF-log Kow relationship in combination with a refined model for predicting uptake and accumulation in edible fruits.
| Original language | English |
|---|---|
| Title of host publication | SETAC North America 27th annual meeting: Global environment and sustainability - sound science in a world of diversity. 5-9 November 2006. Montreal, Canada |
| Number of pages | 165 |
| Place of Publication | Pensacola, FL |
| Publisher | SETAC |
| Publication date | 2006 |
| Publication status | Published - 2006 |
| Event | SETAC North America 27th annual meeting : Global environment and sustainability - sound science in a world of diversity - Montreal, Canada Duration: 5 Nov 2006 → 9 Nov 2006 Conference number: 27 |
Conference
| Conference | SETAC North America 27th annual meeting : Global environment and sustainability - sound science in a world of diversity |
|---|---|
| Number | 27 |
| Country/Territory | Canada |
| City | Montreal |
| Period | 05/11/2006 → 09/11/2006 |