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Phytochemical Composition of Extractives in the Inner Cork Layer of Cork Oaks with Low and Moderate Coraebus undatus Attack
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Orientador(es)
Resumo(s)
The beetle Coraebus undatus, during its larval stage feeds, and excavates galleries on the
cork-generating layer of Quercus suber L. trees, seriously affecting the cork quality with significant
economic losses for the cork industry. This work compared the composition of the extracts present
in the innermost cork layers (the belly) of cork planks from Q. suber trees with low and moderate
C. undatus attack in one stand. The total extractives in the inner cork layer from trees with moderate
and low C. undatus attacks were similar (on average 22% of the cork mass) with a high proportion
of polar compounds (91% of the total extractives). The chemical composition of the inner cork
lipophilic extractives was the same in trees infested and free of larvae, with triterpenes as the most
abundant family accounting for 77% of all the compounds, predominantly friedeline. The hydrophilic
extractives differed on the levels of phenolic compounds, with higher levels in the inner cork extracts
of samples from trees with low attack (90.0 mg GAE g1 vs. 59.0 mg GAE g1 of inner cork mass)
The potential toxic activity of phenolic compounds may have a role in decreasing the larval feeding
Descrição
Palavras-chave
Quercus suber cork borer cork chemical composition phenolics
Contexto Educativo
Citação
Simões, R.; Branco, M.; Nogueira, C.; Carvalho, C.; Santos-Silva, C.; Ferreira-Dias, S.; Miranda, I.; Pereira, H. Phytochemical Composition of Extractives in the Inner Cork Layer of Cork Oaks with Low and Moderate Coraebus undatus Attack. Forests 2022, 13, 1517
Editora
MDPI