Toxicity data for plants are scarce and virtually no information is available on the relationship between dioxin exposure, accumulation in tissue, and biological response. Some species of terrestrial and aquatic plants have been observed to concentrate dioxins from their surroundings without any apparent toxic effects. For instance, some studies on food sources for dairy cows report that several species of grasses are able to incorporate dioxins in leafy tissue. Some species of aquatic plant such as the alga Oedogonium cardiacum and higher plants such as Lemna trisulca (duckweed) and Potamogeton berchtoldii fieber (pond-weed) have been observed to sequester dioxins in leaf and stem tissues without any apparent toxic consequences.

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