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Cuticular waxes of the holm (Quercus ilex l. subsp.ballota (desf.) samp.) and cork (Q. suber l.) oaks by C. M. C. Martins; S. M. M. Mesquita; W. L. C. Vaz is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Cuticular waxes of the holm (Quercus ilex l. subsp.ballota (desf.) samp.) and cork (Q. suber l.) oaks about?

The epicuticular leaf waxes of young leaves of the Holm oak (Quercus ilex L. ssp. ballota (Desf.) Samp.) and the cork oak (Q suber L.) were extracted in chloroform and separated into their constituent wax classes by preparative thin layer and high pressure liquid chromatography. The wax coverage was about 125 mg/cm 2 in Q. suber and about 71 mg/cm 2 in Q. ilex. The main classes encountered (by weight) were odd chain nalkanes (9% in Q. ilex, and 4-27% in Q. suber) and even chain amphiphilic compounds. The major classes of amphiphilic compounds were n-alkan-1-ols (20-27% in Q. ilex, and 18-50% in Q. suber), n-alkanals (`3% in Q. ilex, and up to 25% in Q. suber), n-alkanoic acids (11-12% in Q. ilex, and `5% in Q. suber) and n-alkyl esters (50-56% in Q. ilex, and 25-45% in Q. suber). The major components of each class, identified by gas chromatography coupled to mass spectrometry were C 29 for the n-alkanes (54-58% in Q. ilex, and 47-57% in Q. suber), C 24 for the n-alkan-1-ols (78-87% in Q. ilex, and 77-93% in Q. suber), C 30 for the n-alkanals (up to 57% in Q. ilex, and up to 77% in Q. suber), C 22 and C 24 for the n-alkanoic acids in Q. ilex (39-62%) and C 30 in Q. suber (49%). The

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Author

C. M. C. Martins; S. M. M. Mesquita; W. L. C. Vaz

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0958-0344)

Published

1999

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)