Tectona grandis
What's the taxonomical classification of Tectona grandis?
Tectona grandis belongs to the kingdom Plantae and is classified within the phylum Streptophyta. As a member of the class Equisetopsida and the subclass Magnoliidae, it follows a specialized evolutionary lineage that places it under the order Lamiales. Within this order, it is categorized into the family Lamiaceae, which is further refined into the genus Tectona. Ultimately, the specific identification of this plant is defined by its species name, grandi.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Lamiales |
| Family | Lamiaceae |
| Genus | Tectona |
| Species | grandis |
What are the morphological characteristics of this plant?
Tectona grandis has a massive, woody trunk characterized by deeply fissured, dark grey bark and a spreading crown of large, pinnately compound leaves. Each leaf consists of multiple pairs of oblong leaflets that possess smooth margins and a leathery texture. The plant produces small, inconspicuous flowers that eventually develop into woody, capsule-like fruits. The root system is extensive and fibrous, providing strong structural stability for its heavy limbs. These morphological traits allow the tree to thrive in diverse forest environments.
What is the geographical distribution of this plant?
This plant is native to the tropical and subtropical regions of the Caribbean, specifically found throughout the islands of the West Indies including Cuba, Hispaniola, and Jamaica. It thrives in diverse coastal and inland habitats ranging from lowland forests to rocky maritime cliffs. The species is often distributed in areas with high humidity and seasonal rainfall patterns characteristic of the Caribbean basin. Its presence is most notable in limestone-rich soils where it can establish stable populations. These specific environmental requirements limit its natural range primarily to these island territories.
How is this plant cultivated?
This plant, commonly known as redwood, requires well-drained, acidic soil and a climate characterized by consistent moisture and moderate temperatures to thrive.
It is best cultivated in areas that provide partial shade to full sun, as younger seedlings are particularly sensitive to intense heat. Regular watering is essential during the establishment phase to ensure the root system develops deeply and stays hydrated. Once mature, these trees are remarkably resilient and can withstand various environmental stresses if given sufficient space to expand.
Proper spacing during planting is critical to prevent competition for nutrients and sunlight among the growing canopy.
What parts of this plant are used medicinally?
This plant, Tecomantia grandis, provides medicinal value through its bark, branches, fruits, and leaves. The bark is frequently utilized in traditional remedies to address various inflammatory conditions. Extracts from the branches are sometimes applied to treat skin ailments or systemic issues. The fruits can be processed to aid in digestive health or as a topical treatment. Additionally, the leaves are often brewed into teas or used as poultices to alleviate pain and swelling.
According to a study published by "International journal of Ayurveda research", the bark of Tectona grandis Linn. is used as a hypoglycemic agent. The research evaluated the anti-hyperglycemic effect of the bark extract using oral administration of the suspension at doses of 2.5 and 5 g/kg body wt. for 30 days. This treatment in alloxan-diabetic rats resulted in a significant reduction in blood glucose levels from 250 ± 6.5 to 50 ± 2.5 mg/dL. The study clearly shows that the T. grandis Linn. bark extract exerts anti-hyperglycemic activity.
The parts of this plant that are ued medicinally are shown in the list below.
- bark
- branches
- fruits
- leaf
What traditional systems uses this plant?
This plant, Tectona grandis, is utilized in Ayurvedic medicine to treat various ailments and in Ghanaian traditional medicine to manage skin conditions and infections. In the Ayurvedic tradition, different parts of the tree are often prepared to address digestive issues or to reduce inflammation within the body. Practitioners in Ghana frequently employ the bark and leaves in decoctions to treat malaria or as a topical treatment for wounds. These diverse applications demonstrate how local knowledge systems have integrated the species into their long-standing healing practices. The historical use of the plant highlights its significant role as a versatile botanical resource across different geographic regions.
According to a study published by "Journal of diabetes", Ayurveda documents the antidiaabetic activity of Tectona grandis flowers. The study evaluated the methanol extract of Tectona grandis flowers (METGF) in rats that were rendered diabetic using streptozotocin-nicotinamide at 65 mg/kg-110 mg/kg. During the research, Groups 3 and 4 received METGF at doses of 100 and 200 mg/kg respectively. These effects were observed over a period of 4 weeks alongside a comparison group receiving 5 mg/kg of glibenclamide. The METGF contained polyphenolic active constituents including gallic acid, quercetin, rutin, ellagic acid, ferulic acid, and kaempferol.
The hystorical systems that uses this plant are shown in the list below.
- Ayurveda
- Ghanaian traditional medicine
What are the pharmacological activities of Tectona grandis?
This plant has diverse pharmacological activities including anti-inflammatory, antibacterial, antimicrobial, antioxidant, and anti-diabetic properties. Researchers have identified various bioactive compounds within its tissues that contribute to these medicinal effects. The antioxidant capacity helps mitigate oxidative stress by neutralizing harmful free radicals in the body. Furthermore, its antimicrobial and antibacterial actions provide a defense against various pathogenic microorganisms. Studies also suggest that the plant may assist in managing blood glucose levels through its anti-diabetic mechanisms.
According to a study published by "BMC complementary medicine and therapies", carbonized Tectona grandis exhibited antimicrobial activities against Streptococcus pyogenes, Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus (MRSA), and Pseudomonas aeruginosa. The ethanol extracts from carbonized T. grandis also showed good anti-inflammatory activity. These findings are relevant to the pathogenesis of pharyngitis.
The primary pharmacological activities of this plant are shown in the list below.
- antibacterial
- antimicrobial
- anti-inflammatory
- antioxidant
- anti-diabetic
What medicinal compounds this plant contains?
This plant contains the medicinal compounds tectograndone, tectone, 2β-hydroxyursolic acid, flavone glycosides, and flavonoids. These bioactive constituents contribute to the various therapeutic properties attributed to the species. The presence of specific triterpenoids like 2β-hydroxyursolic acid and unique molecules such as tectone supports its biological activity. Additionally, the diversity of flavonoids and flavone glycosides provides significant antioxidant potential. Together, these chemical components define the complex pharmacological profile of the plant.
According to a study published by "BMC complementary and alternative medicine", the fruits of Tectona grandis contain three isolated compounds including two quinones and one triterpene. These identified metabolites are tectograndone (1), 6-methyl-1,4-dihydroxyanthraquinone (2), and 2β-hydroxyursolic acid (3). The crude ethanol extract demonstrated antibacterial activity against four Gram negative bacteria strains with a MIC of 64-256 μg/mL. Specifically, 6-methyl-1,4-dihydroxyanthraquinone exhibited a strong activity against Eschericia aerogenes with a MIC of 16 μg/mL. Additionally, tectograndone showed a moderate activity against Eschericia coli with a MIC of 32 μg/mL.
The primary medicinal compounds of this plant are shown in the list below.
- tectograndone
- tectone
- 2β-hydroxyursolic acid
- flavonoids
- terpenoids
What health conditions is this plant used for?
This plant is used for managing diabetes, specifically type 2 diabetes, by helping to regulate blood glucose levels. Research suggests that extracts from the plant may assist in lowering hyperglycemia in patients suffering from these metabolic issues. By stabilizing blood glucose, the medicinal properties of the species support better long-term health for those with T2D. This traditional use focuses on controlling the systemic effects of high sugar levels in the bloodstream.
According to a study published by "Journal of diabetes", Tectona grandis flowers are used for their antidiaabetic activity in models of type 2 diabetes (T2D). The study evaluated a methanol extract of T. grandis flowers (METGF) administered at doses of 100 and 200 mg/kg in rats rendered diabetic with 65 mg/kg-110 mg/kg of streptozotocin-nicotinamide. After 4 weeks of treatment, METGF significantly reduced blood glucose and improved body weight with a P < 0.001. The plant contains polyphenolic active constituents like gallic acid, quercetin, rutin, ellagic acid, ferulic acid, and kaempferol that exhibit significant (P < 0.001) insulin sensitizing action. These components contribute to the blood glucose-lowering effect by inhibiting α-amylase and α-glucosidase activity.
The main health conditions this plant is used for are shown in the list below.
- diabetes
- liver disease
- skin diseases
- inflammation
- bacterial diseases
What are the herbal preparations of this plant?
This plant is used to create medicinal herbal preparations such as the EtOAc extract and the ethyl acetate fraction to isolate specific bioactive compounds. Researchers utilize these preparations to investigate the plant's pharmacological potential against various ailments. The EtOAc extract serves as a concentrated mixture of phytochemicals obtained through solvent extraction processes. Refining this mixture further produces the ethyl acetate fraction, which contains a more purified subset of secondary metabolites. These distinct preparations are essential for determining the precise chemical constituents responsible for the plant's therapeutic effects.
According to a study published by "Antioxidants (Basel, Switzerland)", Tectona grandis is a traditional Dai medicine plant used to treat malaria, inflammation, diabetes, liver disease, bronchitis, tumors, cholelithiasis, jaundice, skin disease and as an anti-helminthic. Researchers isolated 26 compounds from the leaves and branches of the plant, including compounds 1-2, 4-6, 9-14 and 16-22 which were reported for the first time. Among these, compounds 5, 15 and 23 demonstrated potent antioxidant capacities with SC50 values ranging from 0.32 to 9.92 µmol/L for DPPH, 0.92 to 1.10 mmol Trolox/L for ABTS and 1.02 to 1.22 mmol Trolox/L for FRAP. The methanolic extract, petroleum ether extract and EtOAc extract showed significant glucose uptake activities, specifically with compounds 21 and 23 promoting uptake in 3T3-L1 adipocytes at 40 µM. Additionally, compounds 4, 5 and 7 displayed significant inhibitory activities against α-glucosidase with IC50 values of 14.16 ± 0.34 µmol/L, 19.29 ± 0.26 µmol/L and 3.04 ± 0.08 µmol/L, respectively.
The main herbal preparations of this plant are shown in the list below.
- EtOAc extract
- ethyl acetate fraction
What side effects this plant can have?
This plant can cause severe physiological damage including cholithetiaasis, increased serum urea levels, jaundice, kidney necrosis, and liver disease. Ingesting its components can lead to the formation of gallstones and significant dysfunction within the hepatic system. The resulting liver disease often manifests as jaundice, which is characterized by the yellowing of the skin and eyes. Furthermore, the toxins may trigger kidney necrosis, leading to permanent damage to the renal tissues. Elevated serum urea levels serve as a critical clinical indicator that the kidneys are failing to filter waste effectively.
According to a study published by "Journal of toxicology", the lethal dose (DL50) of Tectona grandis extract is greater than 5000 mg/kg body weight, as acute studies revealed no death or behavioral disturbances. In subchronic studies, a significant decrease in alanine transaminase activity and serum protein levels occurred at all doses. Alkaline phosphatase activity decreased at doses of 30, 90, and 270 mg/kg, while it increased at the 810 mg/kg dose. Serum and urinary urea levels increased simultaneously at doses of 270 and 810 mg/kg body weight. At the dose of 810 mg/kg, necrosis was observed on kidney sections and vascular congestion was seen on liver sections. Although no adverse effects were noted at 30 and 90 mg/kg doses, the extract can be used for typhoid fever phytomedicine at a therapeutic dose of 30 mg/kg.
The main side effects this plant can have are shown in the list below.
- cholithetiasis
- increased serum urea levels
- jaundice
- kidney necrosis
- liver disease
What herbs are paired with Tectona grandis?
This plant pairs most effectively with woody herbs like rosemary, sage, and thyme to complement its deep, resinous aromatic profile.
The structural strength of these Mediterranean herbs mirrors the robust scent of the wood. When used in culinary or aromatic blends, these pairings balance the plant's intense base notes with bright, herbal top notes. You can also integrate lavender to introduce a floral softness that softens the heavier oils.
These combinations create a well-rounded sensory experience that enhances the overall fragrance.