Abstract
The surfaces of higher plants represent the largest interface between the biosphere and the atmosphere. This contact area amounts to a total of more than 1.2 x 109 km2 and thus exceeds the surface area of the continents by a factor of 8. The actual interface between the atmospheric environment and vegetation is a thin extracellular membrane called the plant cuticle. Its matrix consists of the amorphous polymer cutin formed by cross-linked hydroxyalkanoic acids (19). This matrix supports intra- and epicuticular deposits of cuticular waxes.
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