The genus Commelina: Focus on distribution, morphology, traditional medicinal uses, phytochemistry, and Ethno-pharmacological activities: An updated literature review

Abstract

Natural plant-based medicines have gained in popularity, replacing artificial models and chemicals as a result of new pharmacological discoveries. The increased popularity and acceptability of herbal medications such as Commelina arose from the assumption that all-natural products are safe, readily available, and inexpensive. The genus Commelina (Commelinaceae), which has over 200 species, has long been utilized as a treatment for a variety of ailments and conditions around the world. However, to the authors' knowledge, there are no Comprehensive scientific reports of many medicinally important species of the genus Commelina under one roof. The current narrative review aims to present an updated overview of the various species of Commelina focusing on its morphology; geographical distribution; traditional medicinal use (species type, parts of the plant used, the mode of action, ailments treated, and countries practicing); phytochemical constituents; and pharmacological properties. The data search approach was carried out utilizing English-language electronic databases such as PubMed, Web of Science, Scopus, Science Direct, Research Gates, Ethnobotany Research and Applications, and Google Scholar. Using key terms such as "medicinal plant," "genus Commelina," "traditional medicinal usage of Commelina species," "photochemistry of Commelina species," and "pharmacological (biologic) activities of Commelina species" numerous searches and in-depth discussions are conducted. It was found that many Commelina species contain bioactive-phytochemicals (secondary metabolites) with a variety of structural kinds, including alkaloids, phenolics, flavonoids, glycosides, tannins, saponins, sterols, anthocyanins, and others which are presumed for their pharmacological activities. According to the invitro and preclinical reports, the Commelina species have shown anti-diabetic, antioxidant, anti-microbial, analgesic, anti-inflammatory, anti-cancer, hepato-protective, diuretic, fertility-inducing, anti-diarrheal, and anthelmintic activity, sedative, and anxiolytic activities. Although standardized extracts and phytochemicals derived from numerous Commelina species are presumed to provide safer alternatives for treating a variety of human ailments, the phytochemistry and pharmacology of the genus' plants have yet to be thoroughly investigated, both in preclinical studies with various animal models and in large-scale clinical trials. The authors also advocate for future collaboration among scientists, pharmaceutical firm owners, and other interested parties to develop novel commelina drugs.