Citrus maxima
What's the taxonomical classification of Citrus maxima?
Citrus maxima belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within the class Equisetopsida, it falls into the subclass Magnoliidae and is further categorized under the order Sapindales. The plant is a member of the family Rutaecae, which places it within the genus Citrus, and its specific identity is defined by the species name maxima.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Sapindales |
| Family | Rutaceae |
| Genus | Citrus |
| Species | maxima |
What are the morphological characteristics of this plant?
Citrus maxima has large, evergreen leaves that are elliptical to oblong in shape, possess leathery textures, and feature winged petioles. The tree produces white, fragrant flowers that grow in small clusters from the axils of the branches. Its fruit is characterized by a thick, pithy rind and large segments filled with juicy vesicles. The woody stems are often equipped with sharp spines to protect the developing foliage and fruit. Mature trees can reach significant heights, developing a broad and dense canopy over time.
What is the geographical distribution of this plant?
This plant is native to Southeast Asia, specifically within the tropical and subtropical regions of countries like China, Malaysia, and Indonesia. While it originated in these humid environments, it has been widely introduced to other warm climates around the world. Cultivation is now common in many tropical regions including parts of India, Thailand, and even parts of the Americas. The species thrives in areas characterized by high rainfall and consistent warmth. Today, its distribution is largely driven by human agricultural practices rather than natural dispersal alone.
How is this plant cultivated?
This plant, known as pomelo, requires a tropical or subtropical climate with well-drained, sandy loam soil and consistent temperatures above 60 degrees Fahrenheit to thrive.
Growers must provide ample sunlight and regular irrigation to ensure the large fruits develop properly without splitting. Because the trees are susceptible to various fungal diseases and pests, careful monitoring of soil acidity and nutrient levels is essential. Pruning the branches helps maintain airflow and promotes better fruit production throughout the growing season.
Once established, these trees can produce fruit for many decades if given adequate protection from frost.
What parts of this plant are used medicinally?
This plant Citrus maxima utilizes the fruit peel for various medicinal applications due to its high concentration of essential oils and bioactive compounds. These peels are frequently processed into extracts or dried for use in traditional remedies to treat digestive issues and inflammation. The presence of flavonoids and limonene within the rind provides significant antioxidant and antimicrobial properties. Many practitioners also use the citrus zest to help alleviate symptoms of respiratory congestion. Consequently, the peel serves as a primary medicinal component of the pomelo.
According to a study published by "Plant biotechnology journal", Citrus maxima is an important species used for medicinal purposes. The content of 43 bioactive metabolites and their derivatives increased in the pummelo compared to wild citrus species and Citrus-related genera. Researchers assembled the genome sequence of the medicinal variety Citrus maxima 'Huazhouyou-tomentosa' (HZY-T) at the chromosome level with a genome size of 349.07 Mb. The study utilized the metabolome and transcriptome of six developmental stages of HZY-T and Citrus maxima 'Huazhouyou-smooth' (HZY-S) fruit peel to generate regulatory networks. These networks helped identify the novel MYB transcription factor, CmtMYB108, as an important regulator of flavone pathways.
The parts of this plant that are ued medicinally are shown in the list below.
- fruit peel
What traditional systems uses this plant?
This plant, Citrus maxima, has been utilized in various traditional medicinal systems such as Kem-kem to treat diverse ailments through its fruit, peel, and leaves. In many Southeast Asian cultures, the thick rind is frequently employed to soothe skin irritations or as a fragrant component in ritualistic baths. Traditional practitioners often prepare decoctions from the juice to aid digestion or to alleviate symptoms of the common cold. The aromatic essential oils extracted from the fruit have also historically been used in topical applications to reduce inflammation. These long-standing practices highlight the plant's significant role in historical ethnobotanical knowledge.
According to a study published by "Heliyon", Citrus maxima, known locally as Rimo Malem, is utilized in the Kem-kem traditional medicine practice of the Karo sub-ethnic in North Sumatra, Indonesia. This plant is one of 8 Citrus spp. species studied between April and July 2023 in the Kabanjahe and Berastagi districts. As part of the traditional healing practices passed down through generations, Citrus species are used as material sources to treat at least 9 health problems. Citrus maxima is specifically categorized within the Least Concern (LC) group.
The hystorical systems that uses this plant are shown in the list below.
- Kem-kem
What are the pharmacological activities of Citrus maxima?
This plant has anti-inflammatory, anti-oxidative, anti-cancer, antibacterial, and antimicrobial pharmacological activities derived from its rich concentration of bioactive compounds like flavonoids and limonoids. The anti-oxidative properties help neutralize free radicals, which protects cells from oxidative stress and potential damage. Its anti-inflammatory effects work to reduce swelling and inhibit pain pathways in the body. Research also suggests that its anti-cancer potential lies in its ability to induce apoptosis in various malignant cell lines. Furthermore, the plant exhibits strong antibacterial and antimicrobial activities that can inhibit the growth of various pathogenic microorganisms.
According to a study published by "Food chemistry", the research evaluated the antioxidant, antibacterial, and anti-inflammatroy activities of honey made from several sources, including Citrus maxima. The study assessed these activities alongside the total phenolic and flavonoid contents of the honey. While the study noted that honey from B. pilosa had significantly higher phenolic and flavonoid contents, it also evaluated the honey produced from Citrus maxima. The research focused on the antioxidant, antibacterial, and IL-8 inhibition potential of the various honey types. These findings suggest that antioxidant and antibacterial activities relate to phenolic and flavonoid levels, whereas IL-8 inhibition relates to other components.
The primary pharmacological activities of this plant are shown in the list below.
- anti-inflammatory
- anti-oxidative
- anticancer
- antibacterial
- antimicrobial
What medicinal compounds this plant contains?
This plant contains the medicinal compounds naringin, naringenin, bergamottin, meaanzin, and kaempferol. These bioactive substances contribute to the diverse therapeutic potential found within the citrus species. Specifically, the flavanones naringin and naringenin are often studied for their antioxidant and anti-inflammatory properties. Bergamottin and meaanzin are known to interact with metabolic processes and enzyme activities in the body. Additionally, the flavonoid kaempferol provides further medicinal benefits through its ability to combat oxidative stress.
According to a study published by "Journal of basic and clinical physiology and pharmacology", the shadock (Citrus maxima) contains phenolic compounds identified via HPLC-DAD such as quercetin, caffeic acid, kaempferol, catechin and nariringin. Research into the effect of Citrus maxima extracts on matrix metalloproteinase (MMP) and proteasome activities in CaCo-2, LoVo and LoVo/ADR cell lines showed that shaddock had the least MMP inhibition. Furthermore, shaddock peel extracts also had the least MMP inhibition in LoVo/ADR lysates. The study utilized high-performance liquid chromatography with diode-array detection (HPLC-DAD) to identify these specific compounds. The inhibition of these activities in colon cancer cell lines suggests the potential use of these peels as functional food.
The primary medicinal compounds of this plant are shown in the list below.
- Naringin
- Naringenin
- Bergamottin
- Bergaptol
- Kaempferol
What health conditions is this plant used for?
This plant is used for treating various forms of cancer, specifically lung carcinoma, breast cancer, colon cancer, and white breast adenocarcinoma. Research suggests that the bioactive compounds found within the fruit may possess potent anticancer properties. These natural substances are being studied for their ability to inhibit the growth of malignant cells in different parts of the body. By targeting specific cellular pathways, the extracts might offer a supplementary approach to managing complex oncological conditions. Such studies aim to determine how these phytochemicals can be effectively utilized in modern medical treatments.
According to a study published by "Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society", high-purity naringin was isolated from the fruit peels of Citrus maxima. The cytotoxic activity of this isolated naringin and its metal complexes was investigated against 2 human cancer cell lines, specifically white breast Adenocarcinoma (MCF7) and Lung carcinoma (A549). The Ag ligand complex demonstrated strong cytotoxicity, being more than 3 times the strength against the MCF-7 cell line and 4 times the strength against the A549 cell line when compared to the LC50 of Adriamycin. Additionally, the Adriamycin compound was slightly more active by about 30% and 2 times the strength of the Ru ligand complex against the MCF-7 and A549 cell lines, respectively.
The main health conditions this plant is used for are shown in the list below.
- Lung carcinoma
- breast cancer
- cancer
- colon cancer
- white breast Adenocarcinoma
What are the herbal preparations of this plant?
This plant is Citrus maxima, a species used to create medicinal preparations such as aqueous extracts, essential oils, extracts, infusions, and Citrus maxima tea. The essential oils are often derived from the rind to utilize concentrated aromatic compounds. Aqueous extracts and infusions involve soaking plant parts in water to pull out soluble bioactive constituents. Various concentrated extracts are also produced using solvents like alcohol to ensure a potent medicinal profile. Each of these preparations serves different therapeutic purposes depending on the desired concentration of phytochemicals.
According to a study published by "Journal of medicinal food", Citrus maxima is a natural, medicinal plant used for making beverages that possesses anticancer, antiobesity, and antioxidation properties. When combined with green tea, yellow tea, or black tea, the resulting Citrus maxima tea mixtures significantly reduced lipid deposition in HepG2 cells. The GTCM and YTCM mixtures were found to be slightly more effective than BTCM in this regard. These preparations work by activating the AMPK/ACC signaling pathway, which upregulates the expression of p-AMPK, p-ACC, and CPT-1 proteins. Simultaneously, they downregulate the expression of SREBP1c and fatty acid synthase proteins to inhibit fat synthesis. Consequently, Citrus maxima tea has the potential to alleviate liver lipid deposition and could be responsible for obesity treatment.
The main herbal preparations of this plant are shown in the list below.
- Citrus maxima tea
- aqueous extract
- essential oils
- extracts
- infusions
What side effects this plant can have?
This plant can cause adverse health effects including nausea, diarrhea, stomach upset, allergic reactions, and significant drug interactions. Consuming certain parts of Citrus maxima may lead to digestive distress such as nausea or diarrhea in sensitive individuals. Some people might experience an allergic reaction characterized by itching or swelling after ingestion. Most importantly, the plant contains compounds that can trigger dangerous drug interactions by altering how the body processes specific medications. These complications make it necessary to monitor consumption closely, especially for those on prescription treatments.
The main side effects this plant can have are shown in the list below.
- Drug interactions
- Nausea
- Diarrhea
- Stomach upset
- Allergic reaction
What herbs are paired with Citrus maxima?
This plant pairs best with aromatic herbs such as mint, basil, rosemary, and thyme to complement its intense citrus notes.
The bright acidity of the pomelo flesh provides a sharp contrast to the earthy undertones found in rosemary and thyme. Adding fresh mint or basil can introduce a refreshing sweetness that balances the fruit's natural bitterness. These herbal combinations are frequently used in culinary applications like salads, cocktails, and infused syrups.
Such pairings enhance the complex flavor profile of the fruit through aromatic layering.