In the leaf cuticular waxes of Myricaria germanica L. four different series
of alkanediols were identified: (1) hentriacontanediol isomers with one fu
nctional group in the 12-position arid a second group in positions ranging
from 2 to 18, (2) C-30-C-34 alkanediols carrying one hydroxyl function on a
primary and one on a secondary carbon atom, (3) homologous series of C-25-
C-43 beta -diols predominantly with 8,10- and 10,12-functionalities, and (4
) homologous series of C-39-C-43 gamma -diols with a predominance of 8,11-
and 10,13-isomers. Primary/secondary diols and gamma -diols constituted onl
y trace portions of the total wax mixture. The hentriacontanediols and the
beta -diols amounted to 3.5 and 0.6 mug per cm(2) of leaf surface area, cor
responding to 9 and 2% of the wax mixture, respectively. Based on the diffe
rent homolog and isomer patterns of respective diol fractions, two independ
ent biosynthetic routes leading to the hentriacontanediols and the beta -di
ols are proposed. (C) 2000 Elsevier Science Ltd. All rights reserved.