Polyalthia longifolia
What's the taxonomical classification of Polyalthia longifolia?
Polyalthia longifolia belongs to the kingdom Plantae and is classified within the phylum Streptophyta. At the class level, it is categorized as Equisetopsida, falling under the subclass Magnoliidae. Its taxonomic lineage continues through the order Magnoliales and the family Annonaceae. Ultimately, the plant is identified by its genus, Polyalthia, and its specific species name, longifolia.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Magnoliales |
| Family | Annonaceae |
| Genus | Polyalthia |
| Species | longifolia |
What are the morphological characteristics of this plant?
Polyalthia longifolia has an evergreen, pyramidal growth habit characterized by a tall, narrow trunk and pendulous, lanceolate leaves that are dark green, glossy, and measure up to 25 centimeters in length. The foliage is arranged in a dense, drooping manner along the slender branches, creating a weeping appearance. Its bark is typically smooth and greyish, becoming slightly fissured as the tree matures. Small, inconspicuous greenish flowers emerge from the axils, eventually developing into small, fleshy drupes. These fruits are often reddish or black when ripe and are borne directly on the branches.
What is the geographical distribution of this plant?
This plant is native to the Indian subcontinent, specifically ranging across India, Sri Lanka, and parts of Southeast Asia. It thrives primarily in tropical and subtropical climates where humidity is relatively high. Due to its ornamental value and hardy nature, it has been widely introduced to other tropical regions around the world. Many urban landscapes in Florida, Australia, and various Pacific islands now feature this species. Its ability to adapt to different soil types has facilitated its expansion beyond its original geographic boundaries.
How is this plant cultivated?
This plant is cultivated by sowing seeds or planting cuttings in well-draining, loamy soil within tropical or subtropical climates that maintain consistent warmth.
It requires full sunlight to develop its characteristic tall, columnar growth habit and dense foliage. Regular watering is necessary to keep the soil moist, though the species is relatively drought-tolerant once established. Providing organic mulch helps retain essential moisture and nutrients around the root system.
Because it grows slowly, patience is required during the early stages of development to ensure a strong vertical structure.
What parts of this plant are used medicinally?
This plant provides medicinal value through its bark, leaves, stem, and twigs which are utilized for various therapeutic purposes. The bark is frequently processed to treat skin ailments and internal inflammations. Leaves are often crushed or decocted to manage fever and digestive issues. Both the stem and the small twigs contain bioactive compounds used to alleviate respiratory distress and other minor ailments. These diverse plant parts serve as essential components in traditional herbal remedies.
According to a study published by "Ancient science of life", the bark of Polyalthia longifolia is a commonly used adulterant that shows some similarity with that of asoka. Studies were conducted at Aromaic and Medicinal Plants Research station, Odakkali (Kerala Agricultural University) during 2001-2002 to evolve methods for differentiating the original drug from this adulterant species. These methods include anatomical, biochemical, and chromatographic techniques. No specific medicinal uses for the parts of Polyalthia longifolia are listed in the provided text.
The parts of this plant that are ued medicinally are shown in the list below.
- bark
- leaf
- stem
- twigs
What traditional systems uses this plant?
This plant, known as Polyalthia longifolia, has been utilized extensively in traditional Ayurvedic medicine to treat various ailments including skin disorders, fever, and inflammatory conditions. Practitioners often use the bark and leaves to prepare decoctions that serve as effective anti-inflammatory agents. In many South Asian cultures, the tree is also valued for its ornamental properties and is frequently planted near temples or homes for spiritual significance. Historical applications sometimes include using its extracts to manage digestive issues or as a topical treatment for wounds. Its long history of use reflects a deep integration into both medicinal practices and cultural landscapes.
According to a study published by "Journal of ethnopharmacology", Polyalthia longifolia possesses several medicinal properties and has been used in traditional ayurvedic medicine. It is used for the treatment of dermatological ailments such as kushta and visarpa/herpes virus infection. Additionally, the plant is used to treat pyrexia of unknown origin as mentioned in Visarpa Chikitsa. The study evaluated the in vitro antiviral activity of the methanolic extract of Polyalthia longifolia leaves against paramyxoviruses including peste des petits ruminants virus (PPRV) and Newcastle disease virus (NDV). At non-cytotoxic concentration, the extract was found to inhibit the replication of PPRV and NDV at the viral entry and budding level.
The hystorical systems that uses this plant are shown in the list below.
- Ayurveda
What are the pharmacological activities of Polyalthia longifolia?
This plant has diverse pharmacological activities including anti-cancer, antibacterial, antimicrobial, antioxidant, and antidiabetic properties. Its phytochemical constituents work to inhibit the growth of various pathogenic bacteria and microbes. The presence of bioactive compounds also helps neutralize free radicals through potent antioxidant mechanisms. Research suggests that certain extracts can effectively suppress tumor cell proliferation to provide anti-cancer benefits. Furthermore, the plant demonstrates significant potential in regulating blood glucose levels to serve as an antidiabetic agent.
According to a study published by "Journal of ethnopharmacology", Polyalthia longifolia possesses several medicinal properties and has been used in traditional ayurvedic medicine for the treatment of dermatological ailments like kushta, visarpa/herpes virus infection, and pyrexia of unknown origin. An in vitro experimental study evaluated the methanolic extract of Polyalthia longifolia leaves against paramyxoviruses, specifically peste des petits ruminants virus (PPRV) and Newcastle disease virus (NDV), using Vero cell lines. At non-cytotoxic concentrations, the extract was found to inhibit the replication of PPRV and NDV at the viral entry and budding level. While the extract targets these stages, other steps of the viral life cycle, such as attachment and RNA synthesis, remained unaffected. This plant extract shows promising antiviral activity and potential for the development of effective herbal antiviral drugs.
The primary pharmacological activities of this plant are shown in the list below.
- anti-cancer
- antibacterial
- antimicrobial
- antioxidant
- antidiabetic
What medicinal compounds this plant contains?
This plant contains polyalthialdoic acid, clerodane diterpene 1, 2-oxo-clerodane diterpenes, 4(3 → 2)-abeo-clerodane diterpene, and kaempferol. These specific chemical constituents contribute to the diverse pharmacological properties observed in the species. The various clerodane diterpenes are often studied for their potential biological activities. Additionally, the presence of kaempferol, a known flavonoid, provides antioxidant benefits. Together, these medicinal compounds form the chemical basis for the plant's traditional therapeutic uses.
According to a study published by "Journal of oleo science", three clerodane diterpenes isolated from Polyalthia longifolia leaves were evaluated for their apoptotic potential against human leukemia HL-60 cells. These specific compounds are kolavenic acid (1), polyalthialdoic acid (2), and 16α-hydroxy-cleroda-3,13(14)Z-dien-15,16-olide (3). Compounds 2 and 3 inhibited cell proliferation with IC50 values of 21.8 and 13.7 μM, respectively. Morphological changes and DNA fragmentation analysis indicated that these diterpenes induce apoptotic cell death in the HL-60 cells. The results reveal the importance of P. longifolia as a chemopreventive medicinal plant.
The primary medicinal compounds of this plant are shown in the list below.
- polyalthialdoic acid
- 2-oxo-clerodane diterpenes
- 4(3 → 2)-abeo-clerodane diterpene
- clerodane diterpene 1
- flavonoids
What health conditions is this plant used for?
This plant is used for treating diabetes mellitus, skin diseases, microbial infections, gastric ulcer, and inflammation diseases. Its various chemical constituents provide potent pharmacological properties that help regulate blood sugar levels in diabetic patients. The plant's antimicrobial activity makes it effective in combating various harmful microbial infections throughout the body. Additionally, its soothing properties assist in healing skin diseases and reducing the discomfort associated with inflammatory diseases. It also plays a significant role in soothing the digestive tract to promote the healing of gastric ulcers.
According to a study published by "Molecules (Basel, Switzerland)", Polyalthia longifolia is traditionally used as an antidiabetic remedy primarily in Asia and sub-Saharan Africa. This study investigated the potential of 6 extracts from the leaves and stems of the plant to counteract hyperglycemia and diabetes-related complications. Researchers evaluated aqueous, ethanol, and methanol extracts for their antihyperglycemic, antiglycation, and antiradical properties using alpha-glucosidase, BSA, and ORAC assays. The investigation included an MTT assay on the human cell line HT-29 to assess cell viability and showed slight cytotoxicity. Ultimately, the results demonstrated significant antidiabetic activity specifically in the ethanol and methanol extracts from Polyalthia longifolia leaves.
The main health conditions this plant is used for are shown in the list below.
- diabetes mellitus
- microbial infections
- skin diseases
- gastric ulcer
- inflammatory diseases
What are the herbal preparations of this plant?
This plant is utilized to create various medicinal herbal preparations including methanolic leaf extracts, aqueous extract, and fine powder. Methanolic leaf extracts are often studied for their concentrated bioactive compounds and potential pharmacological properties. The aqueous extract is prepared by soaking the plant parts in water to isolate water-soluble constituents for therapeutic use. Additionally, the dried plant material can be processed into a fine powder for easy administration in traditional remedies. These different forms allow researchers and practitioners to target specific health benefits through diverse delivery methods.
According to a study published by "Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie", Polyalthia longifolia var. angustifolia Thw. is a significant native medicinal plant found throughout Malaysia. The methanolic leaf extracts (PLME) of the plant induce apoptosis in HeLa cells in a dose-dependent manner, causing cell accumulation at sub G0/G1, G0/G1 and G2/M phases. PLME influences intracellular reactive oxygen species by exerting antioxidant effects at half IC50 and pro-oxidant effects at IC50 and double IC50 against HeLa cells. At the IC50 concentration, proteomic profiling showed the up-regulation of pro-apoptotic proteins including BAX, BAD, cytochrome c, caspase-3, p21, p27 and p53. Furthermore, the treatment caused the down-regulation of anti-apoptotic proteins BCL-2 and BCL-w.
The main herbal preparations of this plant are shown in the list below.
- Methanolic Leaf Extracts
- aqueous extract
- powder
What side effects this plant can have?
This plant can induce significant biological damage through mechanisms including DNA damage, apoptosis, cell cycle arrest, cytotoxicity, and various dermatological ailments. Research indicates that specific extracts from Polyalthia longifolia can trigger programmed cell death and disrupt the normal progression of the cell cycle in targeted cells. The high levels of cytotoxicity observed in certain studies suggest that the plant contains bioactive compounds capable of destroying cellular structures. Furthermore, improper contact with the plant's components may lead to various dermatological ailments such as skin irritation or allergic reactions. These multifaceted toxicological effects highlight the complex biochemical impact the plant has on living organisms.
According to a study published by "Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie", Polyalthia longifolia methanolic leaf extracts (PLME) induce apoptosis, cell cycle arrest, and mitochondrial potential depolarization in HeLa cells. The Annexin V/PI flow cytometry analysis showed that PLME induces apoptosis in a dose-dependent manner, while PI flow cytometric analysis demonstrated cell accumulation at sub G0/G1, G0/G1, and G2/M phases. PLME influences intracellular reactive oxygen species by exerting anti-oxidant (half IC50) and pro-oxidant (IC50 and double IC50) effects against HeLa cells. At the IC50 concentration, PLME treatment causes the significant up-regulation of pro-apoptotic proteins including BAX, BAD, cytochrome c, caspase-3, p21, p27, and p53. Additionally, anti-apoptotic proteins BCL-2 and BCL-w were found to be significantly down-regulated during this process.
The main side effects this plant can have are shown in the list below.
- DNA damage
- apoptosis
- cell cycle arrest
- cytotoxicity
- dermatological ailments
What herbs are paired with Polyalthia longifolia?
This plant pairs effectively with herbs such as basil, lemongrass, and peppermint to enhance its aromatic profile in medicinal or culinary applications.
When used in traditional wellness preparations, the citrusy undertones of the leaves harmonize well with the bright notes of peppermint. Lemongrass acts as a complementary base that elevates the subtle earthy qualities of the foliage. Basil can be integrated to add a peppery depth that balances the plant's inherent scent.
These combinations are often explored in aromatherapy and natural botanical infusions.