Bound phenolic compounds in water extracts of soils,plant roots and leaf litter |
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| Authors: | DC Whitehead Hazel Dibb RD Hartley |
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| Institution: | Grassland Research Institute, Hurley, Maidenhead, Berks. SL6 5LR, U.K. |
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| Abstract: | Seven soils were examined for their contents of p-hydroxybenzoic, vanillic, p-coumaric and ferulic acids, p-hydroxybenzaldehyde and vanillin. Water-soluble forms, both “free” and “bound” of the phenolic compounds accounted for less than 0.7% of the total amount of each acid or aldehyde as determined by extraction of the soil with 2 M NaOH. In most instances, more than 50% of the water-soluble compounds were in the bound form, which was estimated after conversion to the free form by treatment of the water extract with NaOH. Water-soluble forms, both free and bound, of each compound also occurred in roots associated with six of the soils, and in beech litter associated with the seventh. |
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