Volatile components from selected Tahitian liverworts.

Area of Science:

• * Phytochemistry
• * Natural Product Chemistry
• * Bryophyte Biology

Background:

• * Bryophytes, including liverworts, are known sources of diverse secondary metabolites.
• * Previous chemical investigations of Tahitian liverworts are limited, necessitating further exploration.
• * Understanding the chemical diversity of liverworts can provide insights into their ecological roles and evolutionary history.

Purpose of the Study:

• * To conduct a comprehensive chemical investigation of six selected Tahitian liverwort species.
• * To identify and characterize novel or characteristic compounds produced by these liverworts.
• * To explore potential evolutionary links between liverworts and algae based on chemical findings.

Main Methods:

• * Extraction and isolation of secondary metabolites from six liverwort species: Trichocolea pluma, Chandonanthus hirtellus, Mastigophora diclados, Jungermannia sp., Plagiochila sp., and Cyathodium foetidissimum.
• * Structure elucidation of isolated compounds using spectroscopic techniques (e.g., NMR, Mass Spectrometry).
• * Comparative analysis of chemical profiles across the investigated species.

Main Results:

• * Each of the six investigated liverworts produced distinct chemical constituents.
• * Vanillic acid methyl ester was isolated for the first time from Trichocolea pluma.
• * Unique compounds identified include skatol (in Cyathodium foetidissimum), herbertane-type sesquiterpenoids (in Mastigophora diclados), fusicoccane-type diterpenoids (in Plagiochila sp.), and cembranes/ent-verticillanes (in Chandonanthus hirtellus and Jungermannia species).
• * Chandonanthus hirtellus was found to biosynthesize algal components.

Conclusions:

• * The chemical analysis confirms the production of characteristic and unique compounds by the studied Tahitian liverworts.
• * The identification of vanillic acid methyl ester in T. pluma represents a novel finding.
• * The presence of algal components in C. hirtellus suggests a potential evolutionary link or symbiotic relationship between certain liverworts and algae.