Eucommia ulmoides
What's the taxonomical classification of Eucommia ulmoides?
Eucommia ulmoides belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within the class Equisetopsida and the subclass Magnoliidae, it is placed in the order Garryales. The plant is a member of the family Eucommiaceae and is situated within the genus Eucommia, specifically identified as the species ulmoides.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Garryales |
| Family | Eucommiaceae |
| Genus | Eucommia |
| Species | ulmoides |
What are the morphological characteristics of this plant?
Eucommia ulmoides has elliptic to ovate leaves that measure approximately 5 to 12 centimeters in length, featuring serrated margins and a distinctive smooth, coriaceous texture. The leaf surfaces are typically dark green on the upper side and slightly paler underneath. This species is characterized by its woody structure and the presence of specialized laticifers that contain sticky, thread-like latex within the tissues. The branching pattern is often irregular, contributing to a spreading or upright growth habit depending on environmental conditions. Its small, inconspicuous flowers are arranged in axillary clusters along the stems.
What is the geographical distribution of this plant?
This plant is native to the subtropical and temperate mountain forests of central and southern China. Its natural range extends through provinces such as Hubei, Hunan, Sichuan, and Zhejiang. It typically thrives in hilly or mountainous regions at moderate elevations where moisture is consistent. The species prefers shaded or semi-shaded environments within deciduous or mixed broad-leaved woodlands. This specific distribution pattern limits its natural occurrence to these particular East Asian ecological niches.
What parts of this plant are used medicinally?
Eucommia ulmoides contains bioactive compounds primarily concentrated in its dried bark and the fibrous strands found within the stem. The bark is harvested and processed to extract substances that are traditionally used to support kidney and liver functions. Within the inner bark, specialized rubber-like fibers can be pulled out by hand, which are often utilized in various traditional formulations. These components are believed to help regulate blood pressure and strengthen the skeletal system. Practitioners frequently prepare decoctions or powders from these specific parts to address chronic ailments.
What are the pharmacological activities of Eucommia ulmoides?
This plant has anti-hyperlipidemic, anti-hypertensive, anti-osteoporosis, anti-inflammatory, and anti-oxidative pharmacological activities. Its bioactive compounds work to lower blood lipid levels and help regulate blood pressure in cardiovascular models. The plant also demonstrates significant potential in preventing bone density loss and mitigating skeletal degradation. Additionally, it functions by suppressing inflammatory pathways and neutralizing harmful free radicals within the body. These diverse medicinal properties make Eucommia ulmoides a valuable subject for therapeutic research.
According to a study published by "Phytomedicine : international journal of phytotherapy and phytopharmacology", fermented Eucommia ulmoides leaves (FEL) demonstrate lipid-lowering and antioxidant activities. In a study using Wistar rats fed a high-fat diet for 8 weeks, aqueous extract of FEL (FELE) was administered at doses of 128, 256, and 512 mg/kg/d. UPLC-MS identified 56 components in FELE, primarily consisting of organic acids, flavonoids, and phenolic acids. FELE intervention significantly reduced body weight, lipid accumulation, and levels of total cholesterol (TC), triglycerides (TG), and low-density lipoprotein-cholesterol (LDL-C), while increasing high-density lipoprotein-cholesterol (HDL-C). Furthermore, FELE improved inflammatory markers and oxidative stress factors including TNF-α, MCP-1, IL-6, MDA, SOD, and CAT. The extract also restored gut microbiota homeostasis by reducing the Firmicutes/Bacteroidetes ratio and modulating amino acid, bile acid, and lipid-related metabolism pathways.
The primary pharmacological activities of this plant are shown in the list below.
- anti-hypertensive
- anti-osteoporosis
- anti-diabetic
- anti-inflammatory
- anti-oxidant
What medicinal compounds this plant contains?
This plant contains the medicinal compounds eucommiol, pinoresinol diglucoside, ulmoidoside A, ulmoidoside B, and ulmoidoside C. These specific bioactive substances are primarily concentrated within the bark and leaves of the species. The lignans and glycosides found in the plant are studied for their potential therapeutic effects on human health. Researchers often examine these chemical constituents to understand their role in traditional medicinal practices. Understanding the precise profile of these compounds helps in developing new pharmacological applications.
According to a study published by "Journal of pharmaceuticaal and biomedical analysis", Eucommia ulmoides leaves contain target compounds including iridoids, phenolic acids, and flavonoids. The recovery yields for ten target analytes from Eucommia ulmoides using water as an anti-solvent were 97.59% for eucommiol (EU), 94.91% for aucubin (AU), 96.09% for geniposidic acid (GA), 90.66% for chlorogenic acid (CA), 87.33% for asperuloside (AP), 86.57% for rutin (RU), 82.15% for kaempferol-3-O-sambubioside (KS), 89.28% for isoquercitrin (IQ), 80.75% for kaempferol-3-O-rutinoside (KR), and 80.75% for astragaline (AS). The contents of these main ingredients in the leaves reach the highest levels during the period from May to October. This specific timeframe appears to be the best harvest period for Eucommia ulmoides leaves.
The primary medicinal compounds of this plant are shown in the list below.
- eucommiol
- ulmoidoside A
- ulmoidoside B
- ulmoidoside C
- ulmoidoside D
What health conditions is this plant used for?
This plant is used for managing osteoporosis, reducing inflammation, providing kidney protection, offering liver protection, and helping to regulate diabetes. Its medicinal properties are frequently utilized to strengthen bone density and combat chronic inflammatory responses in the body. Research suggests that the plant's bioactive compounds play a significant role in supporting renal function and shielding liver cells from damage. Additionally, it is studied for its ability to assist in glucose management for individuals living with diabetes. These diverse therapeutic applications make it a versatile subject in traditional and modern herbal medicine.
According to a study published by "Journal of nutritional science and vitaminology", Eucommia ulmoides, also known as Tochu bark, is examined for its effectiveness in preventing bone loss after menopause. The study utilized six-week-old Sprague-Dawley female rats that were fed a low-calcium diet consisting of 0.01% Ca and 0.3% P for 33 days. A group receiving a diet with 2% Tochu bark extract, containing 0.3% Ca and 0.3% P, showed improved bone mineral density and bone strength compared to the control group. This extract was also found to accelerate intestinal Ca absorption and resulted in higher muscle weight. These findings suggest the plant is effective for improving bone and muscle metabolism in sedentary people with back pains and/or joint pains.
The main health conditions this plant is used for are shown in the list below.
- osteoporosis
- diabetes
- inflammation
- kidney disease
- liver protection
What are the herbal preparations of this plant?
This plant can be prepared as a decoction by boiling the bark in water to extract its bioactive compounds for traditional medicinal use. Practitioners often create a concentrated extract to standardize the dosage of its active constituents. A tincture made with alcohol serves as another method for preserving the plant's medicinal properties for long-term use. Additionally, the dried bark can be ground into a fine powder to be consumed directly or mixed into other substances. These various forms allow for flexible administration depending on the specific therapeutic goal.
The main herbal preparations of this plant are shown in the list below.
- Decoction
- Extract
- Tincture
- Powder
What side effects this plant can have?
This plant can cause no documented side effects in humans. Currently, there is a lack of extensive clinical research to identify specific adverse reactions or toxicities. Most available studies focus on the medicinal properties of its bark rather than safety profiles. Because large-scale human trials are missing, the long-term impact of consuming it remains unknown. Users should exercise caution when using it due to this absence of data.
The main side effects this plant can have are shown in the list below.
- None documented