Sophora japonica
What's the taxonomical classification of Sophora japonica?
Sophora japonica belongs to the kingdom Plantae and is classified within the phylum Streptophyta. As a member of the class Equisetopsida and the subclass Magnoliidae, it falls under the order Fabales. The plant is a prominent representative of the family Fabaceae, placing it within the nitrogen-fixing legume group. Its specific taxonomic hierarchy is completed by its placement in the genus Sophora, with the specific epithet japonica identifying the individual species.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Sophora |
| Species | japonica |
What are the morphological characteristics of this plant?
Sophora japonica has pinnately compound leaves with 15 to 30 small, oval-shaped leaflets arranged in pairs along a central rachis. The tree features a sturdy, grayish-brown bark that becomes deeply fissured and textured as the specimen reaches maturity. During the flowering season, it produces dense, drooping clusters of fragrant, bright yellow pea-like flowers. These blossoms emerge from the leaf axils and are followed by the development of flat, brown, oblong seed pods. The overall structure is typically spreading with a broad, rounded crown.
What is the geographical distribution of this plant?
This plant is native to East Asia, specifically spanning across China, Korea, and Japan. It thrives in temperate regions where it can access well-drained soil and moderate moisture levels. While its primary origins are in these Asian territories, it has been widely introduced to other parts of the world for ornamental purposes. You can now find established populations in many urban landscapes across North America and Europe. This widespread cultivation is due to its hardiness and aesthetic appeal in various temperate climates.
How is this plant cultivated?
This plant thrives in full sun and well-drained soil within USDA hardiness zones 5 through 9.
It prefers a location that offers plenty of light to encourage dense foliage and robust flowering. Regular watering is necessary during the establishment phase, though mature specimens are notably drought tolerant once their root systems are deep. Mulching around the base helps retain moisture and regulates soil temperature throughout the changing seasons.
While it is generally pest resistant, monitoring for scale insects can prevent potential damage to the bark and leaves.
What parts of this plant are used medicinally?
This plant utilizes the immature flowers known as Flos Sophorae Immaturus, the bark, the leaves, the fruit, and the seeds for various medicinal applications. The immature flowers are frequently harvested to provide specific pharmacological benefits in traditional treatments. Extracts from the bark and leaves are often employed to address inflammatory conditions or topical issues. Both the fruit and the seeds contain bioactive compounds that contribute to the plant's overall therapeutic profile. These diverse components allow for a wide range of medicinal uses across different healing practices.
According to a study published by "Analytical sciences : the international journal of the Japan Society for Analytical Chemistry", the extraction of rutin was performed from Flos Sophorae Immaturus. The research examined how the concentration of BMIM-Cl, amounts of Flos Sophorae Immaturus, extraction temperature, and time affected the rutin yield. Under optimized conditions, the rutin yield obtained via aqueous BMIM-Cl was comparable to the yield obtained using methanol. This newly established extraction method was applied to Flos Sophorae Immaturus samples using HPLC with ultraviolet detection.
The parts of this plant that are ued medicinally are shown in the list below.
- Flos Sophorae Immaturus
- bark
- leaf
- fruit
- seed
What traditional systems uses this plant?
This plant, known as Sophora japonica, has been utilized for centuries in Traditional Chinese Medicine to treat various ailments such as bleeding, inflammation, and fever. Practitioners historically used the flower buds, called huai hua, to stop internal hemorrhaging and stabilize blood vessels. The bark and roots were also frequently employed in folk medicine to address skin conditions and parasitic infections. Beyond medicinal applications, the plant played a significant historical role in the production of high-quality yellow dyes for textiles. This multifaceted utility demonstrates the plant's long-standing importance across both therapeutic and industrial traditional practices.
According to a study published by "Talanta", the plant Flos Sophorae was used for the extraction of rutin through an ionic liquid-based microwave-assisted extraction method. This optimized approach achieved an extraction efficiency of 171.82 mg/g with a relative standard deviation (RSD) of 1.47%. The analysis of rutin in the plant was performed using reversed phase high performance liquid chromatography with ultraviolet detection. Under the optimum conditions, the average recovery of rutin from Flos Sophorae was 99.62% with an RSD lower than 3%. The developed approach remained linear at rutin solution concentrations ranging from 42 to 252 mg L(-1) with a regression coefficient (r) of 0.99917.
The hystorical systems that uses this plant are shown in the list below.
- Traditional Chinese Medicine
What are the pharmacological activities of Sophora japonica?
This plant has anti-cancer, anti-inflammatory, antibacterial, antioxidant, and antitumor pharmacological activities driven primarily by its rich content of flavonoids like rutin. These bioactive compounds work to neutralize free radicals, which provides a potent antioxidant effect that protects cells from oxidative stress. The plant also demonstrates significant antibacterial properties by inhibiting the growth of various pathogenic microorganisms. Additionally, its ability to suppress inflammatory responses and interfere with cancer cell proliferation contributes to its dual anti-inflammatory and antitumor effects. Through these diverse mechanisms, Sophora japonica serves as a valuable subject for therapeutic research.
According to a study published by "Journal of microbiology and biotechnology", Sophora japonica L. is a medicinal herb used in East Asia that contains bioactive flavonoids such as sophorabioside and sophoricoside. Sophoricoside is a more bioavailable and therapeutically potent form known for pharmacological properties including anti-inflammatory, anti-cancer, and anti-osteoporotic effects. The conversion of sophorabioside, which is abundant in the fruits and small branches of Sophora japonica, into sophoricoside was studied using α-L-rhamnosiase. Optimal reaction conditions for this biotransformation were observed at pH 6.0 and 55°C. The resulting biotransformed extracts from Sophora japonica fruit and branch extracts, enhanced by 2.5% methanol, demonstrated significant lipoxygenase inhibitory activity. This suggests enhanced anti-inflammatory potential for Sophora japonica-derived sophoricoside-enriched products.
The primary pharmacological activities of this plant are shown in the list below.
- anti-bacterial
- anti-cancer
- anti-inflammatory
- anti-tumor
- anti-oxidant
What medicinal compounds this plant contains?
This plant contains several potent medicinal compounds including the flavonoids kaempferol, rutin, quercetin, and the isoflavonoid genistein. These bioactive substances are primarily concentrated in the flower buds and bark of the species. The presence of rutin and quercetin provides significant antioxidant and anti-inflammatory properties to the plant. Furthermore, the isoflavonoids function as phytoestrogens which may offer various therapeutic benefits in traditional medicine. Together, these chemical constituents contribute to the complex pharmacological profile of Sophora japonica.
According to a study published by "Molecules (Basel, Switzerland)", the Flos sophorae contains flavonoids including rutin, quercetin, kaempferol, and isorrhamnetin. Using optimized infrared-assisted extraction, the extraction yield of these flavonoids was 33.199 ± 0.24 mg/g with an extraction time of only 9 min. The resulting eluents demonstrated a DPPH IC50 of 53.44 ± 0.01 μg/mL and an oxygen radical absorbance capacity (ORAC) of 3785.83 ± 52 μmol/g. An ultra-high performance liquid chromatography method was validated with correlation coefficients of 0.9994-0.9998, reproducibility (RSD, n = 5) of 0.74-1.83%, and recovery values of 97.78-102.94%.
The primary medicinal compounds of this plant are shown in the list below.
- kaempferol
- rutin
- genistein
- quercetin
- isoflavonoids
What health conditions is this plant used for?
This plant is used for treating abnormal capillary fragility, abnormal capillary permeability, arteriosclerosis, atherosclerosis, and various cardiovascular diseases. Its bioactive compounds, particularly rutin, help strengthen the walls of blood vessels to reduce leaking and breakage. By improving vascular integrity, it assists in managing the buildup of plaque within the arteries. This action is essential for mitigating the progression of hardening in the arterial walls. Ultimately, these properties make it a valuable botanical tool for supporting overall heart and circulatory health.
According to a study published by "Journal of visualized experiments : JoVE", the plant Flos sophorae immaturus contains the bioactive flavonoid compound rutin. This specific compound is used for its therapeutic benefits in treating cardiovascular diseases. Rutin has been reported to reduce abnormal capillary permeability and fragility. Furthermore, it acts as a protective agent for cardiovascular and cerebrovascular vessels.
The main health conditions this plant is used for are shown in the list below.
- abnormal capillary fragility
- abnormal capillary permeability
- arteriosclerosis
- atherosclerosis
- cardiovascular diseases
What are the herbal preparations of this plant?
This plant is used to create diverse medicinal preparations including Flos Sophorae Carbonisatus, aqueous-ethanol extracts, decoction pieces, ethanol extracts, and ointments. The charred flowers, known as Flos Sophorae Carbonisatus, are frequently employed in traditional formulas to control bleeding. Practitioners also utilize decoction pieces to brew concentrated teas for internal use. For more specific applications, aqueous-ethanol extracts and pure ethanol extracts provide standardized bioactive compounds. Finally, the plant material can be processed into a topical ointment for dermatological treatments.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", six compounds were isolated from Flos Sophorae Carbonisatus using silica gel column chromatography. The structures of these isolated chemical constituents were elucidated through spectral analysis. These compounds include maltol (1), 3-hydroxypyridine (2), malto-3-O-[6'-O-(4"-hydroxy-tans-cinnamoyl)-beta-D-glucopyranoside (3), 3-O-[beta-D-galactopyranosyl-(1-->2)-beta-D-glucuronopyranosyl] sophoradiol ethyl ester (4), 3-O-[beta-D-galactopyranosyl-(1-->2)-beta-D-glucuronopyranosyl] sophoradiol methyl ester (5), and rutin (6). Compound 4 is a new compound, while compounds 1, 2, 3, and 5 were first reported from Flos Sophorae Carbonisatus.
The main herbal preparations of this plant are shown in the list below.
- Flos Sophorae Carbonisatus
- aqueous-ethanol extracts
- decoction pieces
- ethanol extract
- ointment
What side effects this plant can have?
This plant can cause an unfavorable health impact by inducing nausea, vomiting, and diarrhea when ingested in improper amounts. The presence of certain alkaloids and saponins within the plant tissues can irritate the gastrointestinal tract significantly. Some studies suggest that excessive consumption may lead to more systemic toxicity or allergic reactions in sensitive individuals. Careful monitoring is necessary because the concentration of bioactive compounds can vary depending on the part of the plant used. Therefore, direct consumption without professional guidance poses a genuine risk to human wellness.
According to a study published by "Acta clinica Croatica", the Sophora japonica L. plant contains the phytoestrogen genistein. The presence of this component was proven in 20% of the samples analyzed. Information regarding the presence of the pharmacologically active genistein was neglected to be mentioned despite its unfavorable health impact that can be expected in some consumer groups. These findings documented the counterfeit replacement of extracts with those from the Sophora japonica L. plant.
The main side effects this plant can have are shown in the list below.
- unfavorable health impact
What herbs are paired with Sophora japonica?
This plant, Sophora japonica, is frequently paired with herbs such as licorice root, dandelion, and chrysanthemum in traditional herbal formulations.
Licorice root is often added to balance the intense bitterness of the pagoda tree flowers while harmonizing the overall formula. Dandelion root serves as a complementary diuretic to assist with the plant's heat-clearing properties. Chrysanthemum is another common addition used to enhance the cooling effects on the liver and eyes.
These specific combinations are designed to target inflammation and internal heat through synergistic botanical actions.