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BIBTEX RIS

Caffeine and theobromine in epicuticular wax of Ilex paraguariensis A. St.-Hil.

2000; Elsevier BV; Volume: 55; Issue: 7 Linguagem: Inglês

10.1016/s0031-9422(00)00324-1

1873-3700

Margareth Linde Athayde, Geraldo Ceni Coelho, Eloir Paulo Schenkel,

Plant biochemistry and biosynthesis

Caffeine and theobromine were identified and quantified in leaf epicuticular waxes of Ilex paraguariensis A. St.-Hil. (Aquifoliaceae). The total epicuticular leaf wax content was ca. 0.5% on average of dry leaf weight. Epicuticular caffeine and theobromine contents varied from 0.16 to 127.6 μg/mg and from 0 to 9.5 μg/mg of wax, respectively. For some selected samples, the intracellular methylxanthine concentration was also determined. A positive correlation was found between inner and epicuticular caffeine contents.