
Espécies de cerrado e mata foram analisadas quanto à sua composição em ceras foliares epicuticulares e de seus componentes hidrocarbonetos. Observou-se nas espécies de cerrado uma tendência a teores de ceras pouco maiores que os de espécies de mata estacionai semidecídua. A porcentagem de hidrocarbonetos nas ceras foi maior na maioria das espécies de mata que nas espécies congêneres de cerrado. Pela análise em CG, os hidrocarbonetos mostraram predominância de C29 e C31 apresentando um comprimento médio da cadeia de carbono dos homólogos menos variável em espécies de mata, em torno de 30,5, que de cerrado nas quais este valor variou de 28,5 a 31,3. Os resultados são discutidos em relação ao provável papel ecológico das ceras e sua aplicação como marcadores taxônomicos.Four woody species of cerrado and five woody species of seasonal semideciduous forest were analysed concerning the contents of epicuticular waxes and their parafinic profiles. The cerrado species showed a tendency to higher contents of epicuticular waxes and lower proportion of hydrocarbons than the forest species. The C29 and C31 alkanes were dominant in all species and the average lenght of the hydrocarbon chains were around 30,5 in the forest species and from 28,5 to 31,3 in the cerrado species. The ecological and taxonomic aspects of this characteristics are discussed.
alcanes, cerrado, ecologia, QK1-989, floresta semidecídua, Botany, ceras epicuticulares, alcanos, epicuticular waxes, ecology, cerrado and semideciduous forest
alcanes, cerrado, ecologia, QK1-989, floresta semidecídua, Botany, ceras epicuticulares, alcanos, epicuticular waxes, ecology, cerrado and semideciduous forest
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