ISHS Acta Horticulturae 239: VI International Symposium on Growth Regulators in Fruit Production
PHYSICOCHEMICAL FACTORS GOVERNING THE TRANSPORT OF XENOBIOTIC CHEMICALS IN PLANTS: MOVEMENT INTO ROOTS AND PARTITIONING BETWEEN XYLEM AND PHLOEM |
| Author: | Carol A. Peterson |
| Abstract:
The transport of xenobiotics in plants can be categorized as euapoplastic, pseudoapoplastic, symplastic and ambimobile. Physicochemical properties of the xenobiotic molecules, such as their octanol/water partition coefficients and pKas in the case of acids, will govern the type of movement they display. Although the rationales for the movement of chemicals through the xylem and phloem presented in this article apply to many xenobiotics, there may well be other, as yet unknown, mechanisms of transport for some chemicals such as glyphosate. Nevertheless, the available information linking the physicochemical properties of molecules with their long-distance transport in plants will be useful for predicting the directions of movement of untested chemicals and for designing chemicals that will move in specific directions within plants. | |
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