Polygonatum odoratum
What's the taxonomical classification of Polygonatum odoratum?
Polygonatum odoratum belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within the class Equisetopsida and the subclass Magnoliidae, it falls under the order Asparagales. This plant is a member of the family Asparagaceae, specifically situated within the genus Polygonatum, with its specific designation being the species odoratum.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Asparagales |
| Family | Asparagaceae |
| Genus | Polygonatum |
| Species | odoratum |
What are the morphological characteristics of this plant?
Polygonatum odoratum has arching stems that emerge from thick, creeping rhizomes and bear alternate, lanceolate leaves with parallel venation. These leaves are typically bright green and possess smooth margins that taper to a fine point. Small, bell-shaped white flowers hang from the undersides of the stems in a graceful, drooping fashion during the spring. Following the flowering period, the plant produces fleshy, oblong berries that transition from green to a deep red color. The overall structure of the plant creates a cascading appearance as the stems bend under the weight of the foliage and fruit.
What is the geographical distribution of this plant?
This plant is native to the eastern and central regions of North America, ranging from southern Canada through much of the eastern United States. It typically thrives in the shaded understories of deciduous forests where the soil is moist and rich in organic matter. While its primary range is concentrated in the eastern half of the continent, individual populations can be found extending toward the Midwest. Due to its popularity in horticulture, it has been widely introduced to gardens and landscaped areas across many other temperate regions of the world. This widespread cultivation has allowed the species to establish itself in many non-native environments globally.
How is this plant cultivated?
This plant Polygonatum odoratum grows best in moist, humus-rich, well-drained soil under partial to full shade.
It thrives in woodland settings where it can spread via underground rhizomes to form lush groundcover. Regular watering is essential during dry periods to maintain the moisture levels required for its delicate leaves. Because it is shade-tolerant, it is an ideal choice for planting beneath larger shrubs or trees.
Once established, this perennial requires minimal maintenance other than occasional division to control its spread.
What parts of this plant are used medicinally?
This plant uses the rhizoma, also known as the rhizome or root, for its medicinal properties. These underground structures are harvested and processed to create various traditional remedies. The rhizome is valued in herbal medicine for its ability to nourish the body and support respiratory health. Practitioners often prepare the root in different forms to treat specific ailments related to dryness or deficiency. This part of the plant contains the primary active compounds necessary for its therapeutic effects.
According to a study published by "Journal of ethnopharmacology", the medicinal part of the plant used is Rhizoma Polygonati Odorati. The investigation examined the toxicity of its water-soluble extract through acute, chronic, and genetic toxicity studies. During the 6-month chronic toxicity test, the aqueous extract did not cause death or seriously abnormal signs in animals. Genetic toxicity was not found in the Ames test, the micronucleus test of bone marrow, or the sperm malformation test in mice.
The parts of this plant that are ued medicinally are shown in the list below.
- Rhizoma
- rhizome
- root
What traditional systems uses this plant?
This plant, Polygonatum odoratum, has been utilized in Oriental medicine for centuries to nourish the yin and replenish fluids within the body. Practitioners of traditional Chinese medicine historically prescribed its rhizomes to treat ailments related to dryness, such as coughs and thirst. It was frequently valued for its ability to strengthen the spleen and kidneys while calming the spirit. Beyond its medicinal applications, historical records suggest it was sometimes used as a food source due to its edible properties. These diverse uses highlight the plant's significant role in long-standing herbal traditions.
According to a study published by "Phytotherapy research : PTR", Polygonatum odoratum provides the component kaempferol. This plant has been used for the treatment of respiratory diseases in oriental medicine. In the study, confluent primary hamster tracheal surface epithelial cells were metabolically radiolabeled using (3)H-glucosamine for 24 h. The cells were then treated for 30 min in the presence of varying concentrations of agents to assess (3)H-mucin release. The results showed that kaempferol did not affect mucin release significantly.
The hystorical systems that uses this plant are shown in the list below.
- Oriental Medicine
What are the pharmacological activities of Polygonatum odoratum?
This plant has anti-diabetic, anti-inflammatory, antioxidant, hypoglycemic, and neuroprotective pharmacological activities. Its antioxidant properties help neutralize free radicals and reduce oxidative stress within cellular structures. The plant demonstrates significant hypoglycemic effects, which directly contribute to its broader anti-diabetic potential by regulating blood glucose levels. Furthermore, its anti-inflammatory actions assist in managing systemic swelling and immune responses. Research also indicates that these bioactive compounds offer neuroprotective benefits that may shield nerve cells from degeneration.
According to a study published by "Journal of ethnopharmacology", Polygonatum odoratum is used for the treatment of diabetes and has anti-diabetic active fractions. The saponin-rich fraction, obtained by elution with 60% ethanol, showed the highest anti-diabetic potential in glucose uptake in HepG2 cells and STZ-induced diabetic rats. During a 60d long-term therapy test in severe diabetic rats, the saponin-rich fraction significantly ameliorated symptoms such as elevated blood glucose, body weight loss, and increased food and water intake. The flavonoid-rich fraction, obtained by elution with 40% ethanol, was more potential than the saponin-rich fraction to increase superoxide dismutase (SOD) activity and decrease malondialdehyde (MDA) level in rat plasma. Both the saponin-rich fraction and flavonoid-rich fraction exhibited alpha-glycosidase inhibitory activity with IC(50) values of 2.05±0.32 mg/ml and 3.92±0.65 mg/ml, respectively.
The primary pharmacological activities of this plant are shown in the list below.
- anti-diabetic
- anti-inflammatory
- anti-oxidant
- hypoglycemic
- hepatoprotective
What medicinal compounds this plant contains?
This plant contains steroid saponins, homoisoflavonoids, flavonoids, polygodorasides A-G, and polygodoquinoine A as its primary medicinal compounds. These bioactive constituents are responsible for the diverse pharmacological activities observed in the species. The polygodorasides A through G are specific glycosides that contribute to its unique chemical profile. Additionally, the presence of polygodoquinoine A serves as a significant marker for its medicinal properties. Together, these various classes of compounds work to provide the plant with its therapeutic potential.
According to a study published by "Frontiers in plant science", Polygonatum odoratum is rich in bioactive components with high medicinal value. Researchers identified a total of 1,237 differentially abundant metabolites (DAMs) within the rhizomes of the plant. Flavonoids, including isoflavonoids, flavones, and flavonols, accumulated most in winter and were positively correlated with proteins such as PGT, FLS, CYP75B1, HIDH, IF7MAT, and UFT73C6. Additionally, steroid saponins accumulated most in spring, showing a positive correlation with proteins FDFT1, TM7SF2, DHCR7, CAS1, and 3BETAHSDD. These findings regarding the accumulation of secondary metabolites can serve as an effective reference for extracting specific bioactive components.
The primary medicinal compounds of this plant are shown in the list below.
- Steroid saponins
- homoisoflavonoids
- polygodorasides A-G
- polygodoquinone A
- flavonoids
What health conditions is this plant used for?
This plant is used for managing diabetes and regulating blood sugar levels to address both hyperglycemia and hypoglycemia. Research suggests that the medicinal properties of Polygonatum odoratum can significantly improve glucose tolerance in patients. Through its hypoglycemic effects, the plant helps stabilize erratic insulin responses within the body. These actions make it a subject of interest for controlling chronic metabolic imbalances.
According to a study published by "Journal of chromatography. B, Analytical technologies in the biomedical and life sciences", Polygonatum odoratum has been widely used as a medicinal plant and food supplement for treating diabetes. This study identified nine bioactive compounds, including five phenethyl cinnamides and four homoisoflavanones, with a purity over 98.5%. Specifically, compounds 2 and 4 were found to exhibit stronger alpha-glucosidase inhibitory activity. These two compounds demonstrated IC50 values of 2.3 and 2.7μM respectively. These results suggest the potential medicinal use of Polygonatum odoratum.
The main health conditions this plant is used for are shown in the list below.
- diabetes
- elevated blood glucose
- fasting blood glucose
- hyperglycemia
- hypoglycemia
What are the herbal preparations of this plant?
This plant is processed into diverse medicinal forms including Polygonati Odorati Rhizoma, Polygonatum odoratum fibrous root powder, ethanol extract, methanol extracts, and acetic ether fraction. These various preparations are utilized in pharmacological studies to isolate specific bioactive compounds from the rhizomes. Researchers often employ ethanol and methanol extracts to capture a broad range of soluble constituents for therapeutic testing. Furthermore, the acetic ether fraction is specifically used to refine the chemical profile of the plant's medicinal properties. Each distinct preparation method allows for the targeted extraction of different chemical groups found within the root system.
According to a study published by "Ecology and evolution", Polygonatum odoratum is a widely cultivated medicinal herb in China known for having top grade medical and edible properties. The plastid genome of Polygonatum odoratum varies in length from 154,569 bp to 155,491 bp and contains 131 predicted genes, including 85 protein-coding, 38 tRNA, and eight rRNA genes. This genome features a large single-copy region of 83,486-84,459 bp, a small single-copy region of 18,292-18,471 bp, and two inverted repeats of 26,302-26,370 bp. For the analysis of single nucleotide polymorphisms, a total of 33.64 Gb of clean data with an average of 1.08 Gb per sample were analyzed. Regarding the quality assessment of Polygonati Odorati Rhizoma based on the standards of the Chinese Pharmacopoeia, the POR from the Polygonatum odoratum "Zhongzhu" (GDZZ) cultivar met the minimum criteria for acceptance as raw material for medicinal drug production.
The main herbal preparations of this plant are shown in the list below.
- Polygonati Odorati Rhizoma
- Polygonatum odoratum fibrous root powder
- Ethanol extract
- methanol extracts
- acetic ether fraction
What side effects this plant can have?
This plant can cause significant health side effects including appetite reduction, nausea, vomiting, and severe abdominal pain. Consuming the rhizomes of Polygonatum odoratum often leads to gastrointestinal distress due to its chemical composition. Some individuals may experience dizziness or a general feeling of malaise after ingestion. These adverse reactions are most common when the plant is eaten in large quantities or prepared incorrectly. It is important to avoid consuming this species to prevent these unpleasant physical symptoms.
According to a study published by "Current drug discovery technologies", Solomon's seal is listed among several substances that have been identified as appetite suppressants in traditional medicine books. While these traditional records suggest such uses, modern medicine and articles have not proved that Solomon's seal is effective at reducing appetite. The study notes that many people are seeking herbal alternatives because synthetic drugs for obesity are often costly and have significant side effects. Currently, more clinical studies are needed to prove the actual appetite suppressant and weight loss effects of these herbal medicines.
The main side effects this plant can have are shown in the list below.
- appetite reduction
What herbs are paired with Polygonatum odoratum?
This plant, Polygonatum odoratum, pairs most effectively with herbs like ginseng, Rehmannia glutinosa, and Astragalus membranaceus to enhance its tonic properties in traditional formulas.
These combinations are frequently utilized in decoctions to nourish yin and strengthen the body's vital energy. When paired with cooling herbs, it helps to balance its naturally moistening nature and prevent excessive dampness. Practitioners also combine it with Fu Ling to improve its ability to support kidney function and calm the spirit.
Such strategic pairings ensure the herb's efficacy is optimized for specific therapeutic goals.