The Ranunculaceae genus Thalictrum has a variety of medicinal plants, with its roots, flowers, and whole herbs used in traditional medicine. The genus contains flavonoids, alkaloids (especially structurally diverse benzylisoquinoline), terpene, saponin, essential oils, etc. The biological activities manifest as antimicrobial, antiinflammatory, cardiovascular, and anticancer effects. This chapter reviews the research progress of chemical constituents and bioactivities of Thalictrum and constructs the molecular phylogenetic tree of the genus; its similarities and differences with morphological classification and chemical classification are discussed. This chapter provides reference for the study of medicinal kinship and the sustainable use of drug resources.

Biodiversity, Chemodiversity, and Pharmacotherapy of Thalictrum Medicinal Plants

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Chemical constituents from Thalictrum delavayi and their chemotaxonomic significance

Chemical constituents from Picrasma quassioides (D.Don) Benn. and their network analysis of chemotaxonomic significance

Antimicrobial activity of methanolic extracts of leaf, stem and root parts of the plant species, Thalictrum javanicum was evaluated against certain pathogenic species of bacteria (Bacillus subtilis, B. thuringiensis, Enterococcus faecalis, Staphylococcus aureus, S. pyogenes, Streptococcus faecalis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Proteus vulgaris, P. mirabilis, Serratia marcescens, , Salmonella paratyphi, S. paratyphi-A and S. paratyphi-B.) and fungal species (Aspergillus fumigatus, A. niger, Azospirullum lipoforum, Candida albicans, Fusarium sp., Mucor sp., Penicillum sp., Pacilomyces litacinus, Trichoderma viride and Verticillum lecanii) by disc diffusion method. It was observed that the methanolic extracts had potent antimicrobial activity against both human pathogenic Gram+ and Gram- bacterial species and fungal species. Among the three parts studied, methanolic stem extract showed higher activity against the bacterium, Proteus mirabilis (diameter of inhibition zone, 26 mm). The bacterium, E. coli has been controlled moderately by the extracts of all the studied parts of T. javanicum (for leaf diameter of inhibition zone, 12 mm, for stem it was about 15 mm, and for root it was 12 mm). Similarly for fungal species also the methanolic stem extracts were effective against Mucor sp., (diameter of inhibition zone, 38 mm). The minimum inhibitory concentration of methanolic leaf, stem and root extracts were determined to be ranging between 200 and 500 µg/mL for both bacteria and fungi studied. The results of this study support that the plant species, Thalictrum javanicum had potential antimicrobial activity and it may be used for the commercial production of drugs to treat dreadful diseases caused by various pathogens.

In vitro antimicrobial activity of leaf, stem and root extracts of the medicinal plant species, thalictrum javanicum blume against certain human pathogens

Two new compounds, 5-hydro-N-methylcorydalidine (1) and 1-(4-methoxybenzyl)-2-N-methyl-6-hydroxyl-5, 7-dimethoxy-isoquinoline (2), together with seven known ones (3-9) were isolated from the chloroform extract of the herb Thalictrum delavayi Franch., among which compound 7 was firstly obtained from the genus Thalictrum. Their structures were elucidated on the basis of spectroscopic evidence including HMQC and HMBC experiments.

Chemical Constituents of Thalictrum delavayi

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Chemical Constituents of Thalictrum delavayi