INTRODUCTION:

A common medicinal plant in Ayurvedic and Siddha medicine systems, bael (Aegle marmelos; Family Rutaceae) is used to cure a wide range of illnesses. This tree species is predominantly found in tropical and subtropical regions, thriving in dry forests on hills and plains across various countries, including central and southern India, Burma, Bangladesh, Pakistan, Sri Lanka, Malaysia, Indonesia (Java), and the Philippines. In Bangladesh this plant is commonly referred to as the "Bael Tree" and is considered a minor fruit crop.

The fruit is a nutrient-rich source of carbohydrates, vitamins and minerals. This medium-sized tree is characterized by its densely branched, alternate, and trifoliate leaves with deep green membranous leaflets. It produces large, sweet-scented flowers with a greenish-white which bloom from May to July. The tree also bears small to large globose fruits. Every part of the tree including the stem, bark, root, leaves and fruits, has a specific use at various stages of maturity. For centuries, this tree has been a key ingredient in traditional Ayurvedic medicine. This tree is remarkably resilient and can thrive in poor eroded soil and harsh climatic conditions making it suitable for growth in areas where many other fruit trees struggle to survive¹. bael is frequently grown in temples for its For pujas leaves are utilized. Traditional medicine has traditionally utilized this plant's leaves, stem, bark and fruits for their therapeutic properties². In India Aegle marmelos is recognized as a nutritional supplement and is listed in the Ayurvedic Pharmacopeia of India due to its potential therapeutic benefits, particularly in managing diabetes and related conditions. Despite the widespread use of medicinal plants in various traditional medicine systems, including Ayurveda, Unani, Chinese, and Tibetan medicine many of these remedies lack scientific validation and experimental evaluation to confirm their pharmacological effectiveness³. The bael fruit pulp is rich in phytochemicals, including notable bioactive compounds like Carotenoids, Phenolics, Alkaloids, Pectins, Tannins, Coumarins, Flavonoids and Terpenoids. Additionally, it is an exceptionally rich source of essential Vitamins, particularly Vitamins C, B1, B2, and B3⁴.

Biological profile:

The bael fruit is known by various names across different languages and regions, including Bel, Bael and Sripal in Hindi; Bilva, Sriphal, Shivadruma, and Shivapala in Sanskrit; Maredu in Telugu; Bel in Bengali; Bil in Gujarati; Bilpatra, Kumbala, and Malura in Kannada; Kuvalum in Tamil; Matum and Mapin in Thai; Phneou or Pnoi in Cambodian; Baunau in Vietnamese; Majapahit in Malayan; Oranger du Malabar in French; Marmelos in Portuguese; and Modjo in Java^5.

Taxonomy:

Kingdom : Plantae

Order : Sapindales

Family : Rutaceae

Sub family : Aurantioideae

Genus : Aegle

Species : A. marmelos

Botanic Description:

Aegle marmelos is a medium-sized evergreen tree characterized by slow growth and a height range of 12-15 meters. Its trunk is relatively short with bark that is thick, soft and prone to flaking. The branches are thorny and sprawling. When damaged the branches release a clear, sticky sap that resembles gum arabic, forming long, hardening strands. Initially the sap tastes sweet, but it can lead to throat irritation’

Leaves:

The deciduous leaves of this tree are alternate and typically grow singly or in clusters of two or three. Each leaf is composed of 3-5 oval-shaped leaflets with pointed tips and shallow teeth along the edges. The leaflets measure 4-10cm in length and 2-5cm in width, with the terminal leaflet having a longer stalk. When mature leaves are bruised, they release an unpleasant odor.

Flowers:

The fragrant flowers of this tree are arranged in clusters of 4 to 7 along the young branchlets, featuring 4 recurved, fleshy petals that are green on the outside and yellowish on the inside, accompanied by 50 or more greenish-yellow stamens.

Fruit:

The fruit of this tree is variable in shape, ranging from round to pyriform, oval, or oblong, and measures 5-20 cm in diameter. Its outer shell can be either thin and hard or relatively soft, initially gray-green in color before turning yellowish when fully ripe. The fruit's surface is dotted with tiny, aromatic oil glands. Internally, it features a hard central core surrounded by 8-20 triangular segments with thin, dark-orange walls, filled with a sweet, resinous, and slightly astringent pulp that is pale orange in color. The fruit takes approximately 10-11 months to ripen, typically from March to June.

Seed:

The pulp encloses 10-15 seeds that are flat and elongated, roughly 1 cm in length, featuring fine, fuzzy hairs and a clear, adhesive layer that becomes rigid upon drying⁶.

Ethanobotaical uses:

Various parts of the Bael tree are utilized for their medicinal properties, offering treatments for a range of health issues, including respiratory problems like Asthma, blood-related conditions such as Anemia, physical injuries like fractures, wound healing, joint inflammation, hypertension, liver disorders like jaundice, gastrointestinal issues like Diarrhea, Cognitive function and complications during pregnancy as well as Typhoid fever. In traditional Indian medicine systems, including Ayurveda, Unani, and Siddha Aegle marmelos has been employed as a herbal remedy for managing diabetes mellitus. A decoction made from the roots and bark of the Aegle marmelos tree is utilized to treat fever, leveraging the plant's medicinal properties to provide relief. The leaves of the Aegle marmelos plant are reportedly used to treat various health issues including Inflammation, Asthma, low blood Sugar, Fever reduction, Hepatitis and pain relief, showcasing their potential medicinal benefits. According to Ayurvedic practices, the fruit of the Aegle marmelos plant is used as a tonic for the heart, stomach and intestines, and is also prescribed for treating chronic constipation, Dysentery, Indigestion, Typhoid fever, Weakness, Cholera, Hemorrhoids, recurring fever, Hypochondria, and heart palpitations. The oil is reportedly beneficial for alleviating a distinctive burning sensation in the soles of the feet⁷.

Phytochemical compouds:

No.	Plnat part	Chemichal compouds
1	Fruit	Carotenoids, ascorbic acid, sitosterol, crude fiber, tannins, α- amyrin, carotenoids, and crude proteins
2	Leaves	Skimmianine, Aeglin, Rutin, γ-sitosterole, β-sitosterol, Flavone, Lupeol, Cineol, Citral, Glycoside, O-isopentenyl, Hallordiol, Mameline, Citronellal, Cuuminaldehyde phenylethyle cinnamamides, Euginol, Marmesinin, Aegelin⁸.
3	Bark	Xylose, 4-O-methylglucuronic acid, arabinose, rhamnose⁹.

Key Aspects of In Vitro and In Vivo Studies

In Vitro Studies:

No	Part	Category	Method
1	Leave	Antibacterial activity	Disc diffusion method
		Antioxidant Activity	Antioxidant capacity by different assays¹⁰.
		Anticancer	Human Hepatocellular Carcinoma Cell Line¹¹.
2	Fruit	Antimicrobial activity	Agar well diffusion method
2	Fruit	Amoebicidal activity	Cell culture-based assay¹².

In vivo Studies:

No.	Part	Category	Method
1.	Seeds	Assessment of wound healing activity	Wistar Rat Model¹³.
2	Fruit	Hepatotoxicity (liver damage) Nephrotoxicity (kidney damage	CCl4-induced liver and kidney damage model in male Wistar albino rats¹⁴.
3	Leaves	Antidiabetic activity	O-toluidine method¹⁵.
3	Leaves	Wound healing activity	Excision Wound Model¹⁶.

Cultivation:

Soil and climate requirement:

Bael plants are highly adaptable and resilient, tolerating extreme temperatures, low soil moisture, and a wide range of soils, including rocky, alkaline, swampy and sandy soils. They can thrive in wastelands, dry environments, and semi-arid and tropical locations. However, young plants require protection from hot winds and frost. The ideal soil is sandy loam with good drainage. Bael plants can absorb nutrients from poor soils, but high salt and sodicity levels can affect nutrient uptake. They are suitable for cultivation in subtropical regions with hot summers and moderate winters, making them a hardy and versatile crop.

Propagation:

Bael propagation traditionally used seeds, but seedlings may not retain true-to-type characteristics. To ensure consistency, vegetative methods are preferred, including:

· Root suckers

· Grafting

· Layering

· Budding

Specifically, patch budding and soft wood grafting are modern, professional methods used for multiplying bael, allowing for true-to-type planting materials.

Planting:

1. Excavating 1m x 1m pits, exposing them to sunlight, and filling with topsoil, FYM, and insecticide to prevent termite attacks.

2. Planting in June, after the first monsoon rain, with 5-8m spacing between plants, depending on variety and climate.

3. Recommended planting spacings for specific varieties:

· 5m x 5m for dwarf cultivars like Goma Yashi.

· 8m x 6m for varieties like Thar Divya, NB-7, and others.

· 6m x 6m for varieties like Pant Aparna and Thar Neelkanth.

4. Planting methods include square, rectangular, and other systems, with the goal of maximizing tree density without compromising fruit quality and output efficiency.

Nutrient management:

The goal of integrated nutrient management for Bael cultivation is to:

1. Optimize plant nutrient sources to maintain soil fertility and plant nutrient delivery.

2. Determine the specific nutrient needs of the plant for optimal production.

3. Apply fertilizers and manures in a targeted and efficient manner, such as through drip irrigation systems.

Recommendations for Bael fertilization include:

1. Applying 20kg FYM per year during the pre-bearing stage and 50-80kg per tree during the bearing stage.

2. For young plants, applying 10kg FYM and 50, 25, 50g of NPK per year, increasing the dose annually until the plant is 10 years old.

3. Green manuring is important for Bael plantations on degraded land.

4. Foliar sprays with a combination of zinc sulphate and boron can be beneficial, with three sprays recommended in July, October, and November.

Weed management:

1. Controlling weeds to prevent competition for nutrients, light, and water, which can reduce plant output.

2. Methods of weed control include:

· Hand weeding

· Hoeing

· Ploughing the ground 2-3 times a year

· Mulching

· Intercropping with vegetable crops, especially during the rainy season

4. Regular spading of the basin soil is necessary to prevent moisture loss, especially in black cotton soil.

5. Intercropping and mulching can also help with weed management in tree basins.

Irrigation and its management:

1. Irrigation is not always necessary, but can be beneficial during establishment and early development, especially in summer.

2. Frequency of irrigation:

· 8-10 irrigations per year for young plants

· 4-5 irrigations per year for fruit-bearing trees, spaced at regular intervals during fruit growth and ripening

3. Excessive watering can lead to fruit breaking.

4. Water harvesting techniques can be effective in arid regions to retain moisture for subsequent growth and production.

5. Mulching (organic and inorganic) and water harvesting techniques can promote plant growth, flowering, and fruiting.

6. Drip irrigation systems can increase water use efficiency, save water, and boost output by optimizing moisture levels in the root zone.

7. Bael can be cultivated effectively without irrigation in hot, semi-arid, and desert regions with proper orchard management under rainfed conditions.

Harvesting and yield:

1. Fruits are susceptible to damage if not handled carefully during harvesting.

2. Late maturing types are often leafless during harvest, while early maturing types retain their leaves.

3. Fruits are harvested one at a time, along with a 2-3 cm segment of fruit stem, to prevent infection and assess ripeness.

4. Harvesting time depends on intended use:

· For preserves: November-December

· For fresh eating: February-May

· For sherbet and other products: February-June

5. Soil moisture and temperature affect the harvesting season.

6. Fruiting begins:

· 3-4 years after planting in budded plants

· 7-8 years after planting in seedling plants

7. Fruit production increases with tree age, with a 10–15-year-old tree producing 150-200 fruits per year¹⁷.

Industrial and commercial Applicatioan:

Nutraceutical Benefits:

1. Antimicrobial, Antioxidant, Antidiarrheal, Antidiabetic, Antiulcerative, Cardioprotective, Anticancer, Gastroprotective and Hepatoprotective effects.

2. Rich in fibers, polyphenols, carotenoids, terpenoids, flavonoids, alkaloids, and coumarins.

3. Exhibits Antibacterial, Antihistaminic, Anti-inflammatory, Antipyretic and Analgesic activity.

4. Hepato-protective, Insecticidal, Hypoglycaemic, Antioxidant and immunomodulatory activity.

Industrial Production Uses:

1. Pharmaceutical industry: Bael's medicinal properties make it a valuable ingredient for the development of various medicines.

2. Food industry: Bael fruits can be used to produce juices, jams, preserves, and other food products.

3. Ayurvedic medicine: Bael leaves, stems, bark, and roots are used to cure various human ailments.

4. Cosmetics industry: Bael's Antioxidant and Antimicrobial properties make it a potential ingredient for skincare and haircare products.

5. Functional foods and beverages: Bael can be used as a functional ingredient in various food and beverage products, such as energy drinks, health supplements, and nutraceuticals.

Potential Applications:

1. COVID-19 treatment and prevention

2. Development of natural remedies for various diseases

3. Production of herbal medicines and dietary supplements

4. Creation of functional foods and beverages with added health benefits

5. Use in traditional medicine and Ayurvedic practices¹⁸.

Toxicity Studies of Aegle marmelos (AM) Leaf Extracts:

1. Acute Toxicity: The LD50 value of AM leaf extracts was found to be relatively high (1500mg/kg body wt) when administered intraperitoneally in rats.

2. Short-term Toxicity: No significant toxic effects were observed in rats administered AM leaf extracts at doses of 50-100mg/kg body wt for 14 consecutive days.

3. Long-term Toxicity: Further studies are required to rule out any long-term adverse effects.

4. Margin of Safety: The extracts of AM leaves have a high margin of safety, with a broad therapeutic window and high therapeutic index value.

5. Phytochemical Analysis: Further phytochemical analysis is required to identify the active compounds responsible for the toxic manifestations.

The intraperitoneal administration of AM leaf extracts at doses of 50-100mg/kg body wt for 14 consecutive days did not induce any short-term toxicological effects in male and female Wistar rats. Doses of up to 1000mg/kg body wt (i.p.) did not produce any mortality, indicating that the leaf extract of AM has no short-term harmful effect¹⁹.

Future Scope:

1. Adoption of Advanced Technologies: Implementing advanced technologies can improve Bael production quality and yield.

2. Horticultural Interventions: Improved cultivars, high-density planting, plant growth regulators, drip irrigation, nutrient and canopy management can enhance plant health and flowering.

3. Export Market Focus: Emphasizing fruit quality, particularly size, pulp color, aroma, and minimum residue limit, can increase Bael's export potential.

4. Sustainability for Small Holdings: Bael is a suitable crop for small holdings due to its adaptability to varied topography and agro-climatic conditions.

5. Nutritional, Livelihood, and Health Security: Bael production can provide opportunities for nutritional, livelihood, and health security, especially in arid and semi-arid regions.

Potential Areas for Development:

1. Research and Development: Further research is needed to improve Bael production, processing, and marketing.

2. Value Chain Development: Developing a value chain for Bael production can help increase its economic viability and sustainability.

3. Market Promotion: Promoting Bael products in domestic and international markets can increase demand and improve the livelihoods of farmers^20.

CONCLUSION:

Aegle marmelos commonly known as Bael, is a versatile and resilient tree species with a rich history in traditional medicine and cultural practices. Its adaptability to diverse environments and potential for nutritional, livelihood, and health security make it an attractive crop for small holdings and arid regions. This review aims to summarize the key findings and future scope of Bael, highlighting its medicinal properties, nutritional value, industrial applications, and potential areas for development. Bael has been used in Ayurved and Siddha medicine for various ailments, including diabetes, digestive issues, and respiratory problems. Its fruit, leaves, and roots are rich in bioactive compounds, such as Carotenoids, Phenolics, Alkaloids and Flavonoids which contribute to its medicinal properties. Bael fruit is also a valuable source of nutrition, rich in Carbohydrates, Vitamins and minerals. The industrial applications of Bael include potential uses in pharmaceuticals, food, cosmetics, and functional foods. Its medicinal properties make it a valuable ingredient for the development of various medicines, while its nutritional value and bioactive compounds make it a potential ingredient for food products. Toxicity studies have shown that Bael leaf extracts have a high margin of safety, with no significant toxic effects observed in short-term studies. This suggests that Bael is a relatively safe crop for consumption and use in traditional medicine. The future scope of Bael is promising, with opportunities for improvement through advanced technologies, horticultural interventions and export market focus. Potential areas for development include COVID-19 treatment and prevention, natural remedies, functional foods and beverages and traditional medicine and Ayurvedic practices. Recommendations for research and development, value chain development, and market promotion can help realize Bael's potential and improve the livelihoods of farmers. Overall, Bael is a valuable crop with a rich history and promising future, offering opportunities for nutritional, livelihood and health security, particularly in arid regions.

REFERENCES:

1. Uddin MS, Islam MS, Alam MA, Hossain MM. Study on physico-morphological characteristics of 14 Bael (Aegle marmelos Corr.) genotypes grown at Chapainawabganj, Bangladesh.

2. Balakumar S, Rajan S, Thirunalasundari T, Jeeva S. Antifungal activity of Aegle marmelos (L.) Correa (Rutaceae) leaf extract on dermatophytes. Asian Pacific Journal of Tropical Biomedicine. 2011 Aug 1;1(4):309-12.

3. Ahmad W, Amir M, Ahmad A, Ali A, Ali A, Wahab S, Barkat HA, Ansari MA, Sarafroz M, Ahmad A, Barkat MA. Aegle marmelos leaf extract phytochemical analysis, cytotoxicity, in vitro antioxidant and antidiabetic activities. Plants. 2021 Dec; 10(12): 2573.

4. Wangkahart E, Wachiraamonloed S, Lee PT, Subramani PA, Qi Z, Wang B. Impacts of Aegle marmelos fruit extract as a medicinal herb on growth performance, antioxidant and immune responses, digestive enzymes, and disease resistance against Streptococcus agalactiae in Nile tilapia (Oreochromis niloticus). Fish and Shellfish Immunology. 2022 Jan 1; 120:402-10.

5. Kaur A, Kalia M. Physico chemical analysis of bael (Aegle marmelos) fruit pulp, seed and pericarp. Chemical Science Review and Letters. 2017; 6(22): 1213-8.

6. Mali SS, Dhumal RL, Havaldar VD, Shinde SS, Jadhav NY, Gaikwad BS. A systematic review on Aegle marmelos (Bael). Research Journal of Pharmacognosy and Phytochemistry. 2020; 12(1): 31.

7. Sharma GN, Dubey SK, Sharma P, Sati N. Medicinal values of bael (Aegle marmelos) (L.) Corr.: A review. Int J Curr Pharm Rev Res. 2011; 2(1):12-22.

8. Asghar N, Mushtaq Z, Arshad MU, Imran M, Ahmad RS, Hussain SM. Phytochemical composition, antilipidemic and antihypercholestrolemic perspectives of Bael leaf extracts. Lipids in Health and Disease. 2018 Dec; 17:1-9.

9. Basak RK, Mandal PK, Mukherjee AK. Investigations on the structure of a hemicellulose fraction isolated from the trunk of a young bael (Aegle marmelos) tree. Carbohydrate Research. 1982 Jun 16;104(2):309-17.

10. Mahomoodally MF, Mollica A, Stefanucci A, Aumeeruddy MZ, Poorneeka R, Zengin G. Volatile components, pharmacological profile, and computational studies of essential oil from Aegle marmelos (Bael) leaves: A functional approach. Industrial Crops and Products. 2018 Dec 15; 126:13-21.

11. Kulprachakarn K, Ounjaijean S, Srichairatanakool S, Kanjanapothi D. Evaluation of cytotoxicity and antioxidant potential of bael leaf (Aegle marmelos) on human hepatocellular carcinoma cell line. Pharmacognosy Research. 2020; 12(3).

12. Das G, Ghosh A, Sen AK. Studies on the antidiarrheal activity and antimicrobial activity of Aegle marmelos dried fruit pulp: validating its traditional usage. ES Food and Agroforestry. 2022 Jan 13;7(2):48-53.

13. Munot Y, Gavit S, Jadhav P, Sonawane S, Rajpurohit P. The medicinal wonders and formulation of bael (Aegle marmelos): a comprehensive review.

14. Garg D, Sharma A, Kumar V. Evaluation of the hepatoprotective and nephroprotective properties of bael fruit extract against carbon tetrachloride-induced toxicity in rats. Journal of Applied Pharmaceutical Research. 2024 Jun 30;12(3):11-20.

15. Ismail MY, Yaheya M. Clinical evaluation of antidiabetic activity of Trigonella seeds and Aegle marmelos leaves. World Applied Sciences Journal. 2009; 7(10): 1231-4.

16. Arunachalam KD, Subhashini S, Annamalai SK. Wound healing and antigenotoxic activities of Aegle marmelos with relation to its antioxidant properties. J Pharm Res. 2012 Mar; 5(3): 1492-502.

17. Ahirwar SK, Pandey SK, Dhurve L, Anjanawe S, Gautam D. Cultivation and Modern Techniques of Minor Fruit Crops. Ahirwar SK, Pandey SK, Dhurve L, Anjanawe S, Gautam D. Cultivation and Modern Techniques of Minor Fruit Crops.

18. Poojan S, Dwivedi SK, Pandey D, Singh A, Siddiqui S, Pandey K. Nutraceutical Profiling and Plant-Based Products of Bael for Human Health. Applied Fruit Science. 2024 Aug; 66(4): 1697-706.

19. Veerappan A, Miyazaki S, Kadarkaraisamy M, Ranganathan D. Acute and subacute toxicity studies of Aegle marmelos Corr., an Indian medicinal plant. Phytomedicine. 2007 Feb 19; 14(2-3): 209-15.

20. Singh AK, Singh S, Saroj PL, Singh GP. Improvement and production technology of bael (Aegle marmelos) in India—A review. Current Horticulture. 2021; 9(1): 3-14.

Received on 06.05.2025 Revised on 23.06.2025

Accepted on 28.07.2025 Published on 06.10.2025

Available online from October 13, 2025

Asian J. Pharm. Res. 2025; 15(4):425-430.

DOI: 10.52711/2231-5691.2025.00066

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Creative Commons License.