Medicinal plants brought by Indian indentured immigrants: A comparative review of ethnopharmacological uses between Mauritius and India

Abstract

Ethnopharmacological relevanceMauritius is famous for its floricultural diversity and traditions practiced across the island by various ethnic groups. During the British rule in the 1835s, Indian indentured labourers migrated to Mauritius and played a very important role in shaping the Mauritian culture. They brought along their high heritage of traditional knowledge of certain medicinal herbs and spices. Nonetheless, there has been no comparative study to investigate whether these past traditional knowledge are still preserved in Mauritius and India. Aim of the studyTo document and compare the traditional uses of medicinal herbs and spices brought by Indian indentured labourers with their current uses in Mauritius and India, and to review pharmacological studies of such plants. Materials and methodsLocally published textbooks, research dissertations, and relevant records from the ‘Mauritiana’ section of the University of Mauritius library were scrutinised for possible early records of such herbs and spices brought by Indian indentured immigrants. Field trips and site visits to Mauritius Herbarium and The National Folk Museum were conducted to gather data on their traditional uses as practiced by the Indian indentured immigrants. A literature search was performed to gather the current ethnomedicinal uses of these plants in Mauritius and India using key databases such as ScienceDirect and PubMed, as well as thesis from local university website. Pharmacological studies on these plants were also reviewed in an attempt to compare the ethnomedicinal uses against reported ailments. ResultsIndian labourers brought 18 medicinal plants for medicinal purposes as documented at the folk museum of Indian Immigration. Piper betle L., Azadirachta indica A. Juss., and Curcuma longa L. were common plants used by Indian indentured immigrants against a wide range of ailments. Data obtained from recent ethnomedicinal surveys revealed that A. indica and C. longa were the most traditionally used plants in India, while in Mauritius, C. longa was the most popular plant followed by Allium sativum L. and Ocimum tenuiflorum L. It was also found that all these plants are currently being used against a wide range of diseases in both countries. In addition, several studies have highlighted the pharmacological properties such as analgesic, anti-inflammatory, anti-microbial, anti-pyretic, and anti-diabetic for some plants. ConclusionThis investigation can be considered as a first attempt to document and compare traditional knowledge of medicinal plants brought by Indian immigrants. We observed that some of these knowledge are preserved and still practiced in Mauritius. It is anticipated that this study will revive the interest in safeguarding and promoting the ancestral knowledge on the uses of such plants.