A Review on Botanical, Geographical, and Nutritional Properties of the Underutilized Tropical Species Limonia acidissima L.

Review Article

Abstract

Limonia acidissima L. (Rutaceae), also called as the wood apple, is a highly resilient, drought-tolerant tropical tree species indigenous to the arid and semi-arid plains of the Indian subcontinent and Southeast Asia. The highly aromatic acidic pulp inside the heavily lignified, stony pericarp, serves as a rich repository of macronutrients, micronutrients, and functional secondary metabolites. The tree has high concentrations of dietary fibers, carbohydrates, pectin, and proteins within the pulp, alongside significant mineral densities predominantly potassium, calcium, and phosphorus and essential vitamins such as ascorbic acid, thiamine, and riboflavin. Phytochemical composition shows rich volatile terpenes, furanocoumarins, alkaloids, flavonoids, phytosterols, and organic acids distributed across the fruit pulp, seeds, leaves, and bark tissues. Traditional healthcare systems, including Ayurveda, Siddha, and Unani, have historically used various parts of this tree species to manage gastrointestinal disturbances, hepatobiliary disorders, metabolic anomalies, respiratory infections, and cardiovascular weakness. Modern pharmacological assays substantiate these ethnobotanical applications, indicating robust antioxidant, anti-hyperglycemic, hepatoprotective, antimicrobial, gastroprotective, and cytotoxic behaviors both in vitro and in vivo. Although having high-value therapeutic and nutritional characteristics, the crop remains largely neglected by commercial industries due to a lack of standardized processing methodologies, clinical validation, and genetic optimization