Phenolic acid and flavonoid diversity in four Eucalyptus species
Fazilet Özlem Albayrak | Yüksel Keleş
The economic importance of Eucalyptus trees is due to their rapid growth and high biomass productivity, as well as the beneficial chemical compounds found in their various tissues. Eucalyptus cultivation is common in the southern part of Turkey, especially in the coastal areas of the Mediterranean. In this study, phenolic acids and flavonoids were analyzed in methanol extracts leaf tissues of four eucalyptus species by HPLC. Fifteen different phenolic compounds were determined in the leaf tissues of the four Eucalyptus species examined. The highest total phenolic amounts were found in E. botryoides (160.56 mg g-1DW), followed by E. tereticornis (66.47 mg g⁻¹ DW) and E. citriodora (64.02 mg g⁻¹ DW). Twelve different compounds were determined in E. botryoides and E. citriodora species, 10 in...
Gall wasps change the biochemical composition of Eucalyptus leaves
Yüksel KELEŞ
Determining the effects of gall wasps on leaf biochemistry may contribute to the understanding of damage mechanisms. The study was carried out in eucalyptus plantations in the coastal regions of the Northeastern Mediterranean (Tarsus/Mersin/Turkey). Biochemical analyses were performed on Eucalyptus camaldulensis leaves infested and uninfested with two different gall wasps (Leptocybe invasa and Ophelimus maskelli) and the data were compared. The flavonoid content of the leaves reduced 16.5% in leaves infested with L. invasa and 33.7% with O. maskelli. Total antioxidant capacity decreased with O. maskelli infestation but did not change with L. invasa infestation. Copper ion reduction capacity increased significantly with both pest infestations. Ascorbic acid increased by 87% in L. invasa i...