Báo cáo khoa học: Characterization of surface n -alkanes and fatty acids of the epiphytic lichen Xanthoria parietina, its photobiont a green alga Trebouxia sp., and its mycobiont, from the Jerusalem hills

Characterization of Surface n-Alkanes and Fatty Acids of the Epiphytic Lichen Xanthoria Parietina, Its Photobiont a Green Alga Trebouxia Sp., and Its Mycobiont, from the Jerusalem Hills

Authors: A. Torres, I. Dor, J. Rotem, M. Srebnik, and V. M. Dembitsky

Field: Medicinal Chemistry and Natural Products, Environmental Sciences, Plant Pathology

Document Summary: This study investigates the n-alkane and fatty acid composition of the epiphytic lichen Xanthoria parietina, its algal photobiont Trebouxia sp., and its fungal mycobiont, collected from the Jerusalem hills. Using GC-MS analysis, the researchers identified and quantified various n-alkanes and fatty acids in each component. The findings reveal distinct profiles for the photobiont, which primarily synthesizes unsaturated fatty acids and short-chain n-alkanes, and the mycobiont, characterized by saturated fatty acids and long-chain n-alkanes. Dehydroabietic acid was found in both the lichen and mycobiont. This research marks the first instance of differentiating the n-alkane and fatty acid contributions of photobionts and mycobionts in X. parietina.

Detailed Table of Contents:

• Introduction
• Materials and Methods
• Lichen samples
• Isolation and cultivation of photobionts
• Isolation and cultivation of mycobionts
• Extraction of hydrocarbons and fatty acids
• GC-MS analysis
• Results and discussion