Hibiscus syriacus
Hibiscus syriacus · Accepted scientific name
Scientific literature: Very Sparse (4 studies) · ★☆☆☆☆
Hibiscus syriacus is a versatile plant species that has gained significant scientific interest due to the therapeutic potential found within its root bark. Various preparations, including crude extracts (CE), petroleum extracts (PE), and ethanol extracts, have been studied for their diverse biological activities. These extracts contain key bioactive chemicals such as scopoletin and 2,7-dihydroxy-6-methyl-8-methoxy-1-naphthalenecarbaldehyde. Research indicates that these compounds exhibit antioxidant, hepatoprotective, ACE-inhibitor, and aldose-reductase-inhibitor properties. Consequently, the plant shows promise in managing complex physiological conditions such as hyperglycemia, obesity, lipid peroxidation, and monoamine oxidase activity.
- Synonyms
- Hibiscus Syriacus Var. Sinensis · Hibiscus Syriacus Var. Totoalbus · 21 more
- Common names
- Not available
- Family
- Malvaceae
- Distribution
- Not available
- Plant Parts
- Root
Classification
Common Names
Hibiscus syriacus is a versatile flowering shrub that is recognized by several distinct common names across different regions. Many gardeners affectionately refer to this plant as Altea or Althéa, highlighting its historical botanical connections. Depending on the local dialect or regional preference, you may also encounter it labeled as Althaeastruik or Altheastruik. In certain European contexts, it is frequently identified by the German name Garten-Hibiskus. Regardless of the specific name used, this plant remains a beloved staple in ornamental landscapes worldwide.
Sources: Catalogue of Life (COL)
Synonyms
Hibiscus syriacus is a botanical subject often subject to various naming complexities due to its many synonyms. For instance, it is frequently referred to in older texts as Althaea frutex. The plant is also linked to several other names, including Hibiscus acerifolius and Hibiscus arborescens. Furthermore, taxonomic discussions often connect it to Hibiscus chinensis and Hibiscus floridus. Understanding these overlapping designations is essential for accurate identification in horticultural studies.
Sources: The World Checklist of Vascular Plants (WCVP)
Taxonomy
Hibiscus syriacus belongs to the expansive kingdom Plantae, representing a diverse group of multicellular organisms. Within this kingdom, it is classified under the class Equisetopsida, showcasing its complex vascular structure. The plant further falls into the order Malvales, a grouping that links it to many other flowering species. It is a prominent member of the family Malvaceae, known for its characteristic bloom patterns. Ultimately, this beautiful specimen is defined by its specific genus, Hibiscus, which highlights its unique botanical identity.
| Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Malvales |
| Family | Malvaceae |
| Genus | Hibiscus |
Sources: The World Checklist of Vascular Plants (WCVP)
Distribution
Geographic Regions
Hibiscus syriacus exhibits a broad geographic range that spans across multiple continents and diverse climates. In Africa, the species can be found in various regions, including Tunisia in the north, the Northern Provinces of the south, and Cameroon within West-Central Tropical Africa. Its presence extends into the Asia-Temperate zone, where it thrives in the mountainous terrains of the Caucasus. Specifically, populations are established throughout both the North Caucasus and the Transcaucasus regions. This wide distribution highlights the plant's remarkable ability to adapt to both tropical and temperate environments.
Sources: The World Checklist of Vascular Plants (WCVP)
Identification
Morphology
Hibiscus syriacus typically presents as a robust, self-supporting shrub that adds structure to any garden landscape. This resilient plant reaches a respectable height, generally ranging from a minimum of 1.5 meters to a maximum of 4 meters. Depending on its specific environmental conditions, it often settles into a substantial stature of at least 3.375 meters. Its sturdy growth form makes it an excellent choice for creating natural privacy screens or focal points. Ultimately, the varying dimensions of this shrub allow for versatile use in diverse horticultural designs.
Sources: Global Inventory of Floras and Traits (GIFT)
Biological Activities
Hibiscus syriacus, commonly known as Rose of Sharon, demonstrates significant therapeutic potential through its diverse biological activities. Recent studies highlight its potent antioxidant properties, which help reduce oxidative stress by enhancing key antioxidant enzymes. Additionally, the plant exhibits strong antidiabetic effects by assisting in glucose regulation and increasing insulin production. It also provides vital hepatoprotective benefits, as evidenced by improved liver enzyme levels and lipid profiles. Together, these multifaceted characteristics support the use of Hibiscus syriacus as a promising adjunctive therapy in managing metabolic health.
Compounds
Hibiscus syriacus serves as a rich source of diverse bioactive secondary metabolites. Scientific investigations into its root bark have successfully identified several significant chemical constituents. Among these isolated compounds, researchers confirmed the presence of the known coumarin scopoletin. This specific molecule, alongside a newly discovered coumarin analogue, demonstrated the ability to inhibit monoamine oxidase. Such findings highlight the potential pharmacological importance of the chemical profile found within this plant species.
Conditions
Hibiscus syriacus responds to various nutrient and water management protocols, including a control group receiving 0 g/yr/tree of fertilizer. The plant was subjected to multiple irrigation-fertilization treatments, specifically at levels of 0.2, 0.3, and 0.4 ton/yr/tree. Additionally, the study examined the effects of a specific fertilizer application of 138.0 g/yr/tree. These varying levels of irrigation and fertilization are used to determine the optimal conditions for high-quality seedling production.
Preparations
Hibiscus syriacus is prepared as root bark to isolate specific bioactive compounds such as naphthalenes and coumarins. This plant is also prepared as chloroform extract (CE) and petroleum ether extract (PE) to evaluate its anticancer activity against various cancer cell lines. Furthermore, Hibiscus syriacus is prepared as ethanol extracts for testing its acaricidal efficacy against the mite Ornithonyssus sylviarum. These different preparation methods allow researchers to investigate the plant's diverse medicinal properties, ranging from antioxidant activity to parasite control. Through these various forms, the chemical profile of the plant is effectively utilized for pharmacological study.
Parts used
Hibiscus syriacus contains various bioactive compounds that can be specifically isolated from its root bark. Researchers have successfully identified several unique naphthalenes, known as syriacusins A-C, from this particular plant part. These naphthalenes have demonstrated the ability to inhibit lipid peroxidation and show potential cytotoxicity against certain human cancer cell lines. Additionally, the root bark serves as a source for new coumarins and coumarino-lignans that possess significant biological properties. Some of these isolated substances even exhibit monoamine oxidase inhibitory activity and antioxidative effects comparable to vitamin E.