Pistacia vera
What's the taxonomical classification of Pistacia vera?
Pistacia vera belongs to the kingdom Plantae and is classified within the phylum Streptophyta. At the class level, it is categorized as Equisetopsida, falling under the subclass Magnoliidae. Following the taxonomic hierarchy further, it is placed in the order Sapindales and the family Anacardiaceae. Ultimately, the plant is identified by the genus Pistacia and is specifically designated by the species name vera.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Sapindales |
| Family | Anacardiaceae |
| Genus | Pistacia |
| Species | vera |
What are the morphological characteristics of this plant?
Pistacia vera has a deciduous, spreading tree structure characterized by pinnately compound leaves that typically contain 14 to 30 small, lanceolate leaflets. The bark of the mature tree is thick and develops deep longitudinal fissures as it ages. Small, inconspicuous flowers are produced in panicles, which eventually develop into drupe-like fruits known as pistachios. These fruits transition from green to a reddish or yellowish hue when they reach maturity. The woody branches are relatively sturdy and can support a large, rounded canopy.
What is the geographical distribution of this plant?
This plant is native to the arid and semi-arid regions of Central Asia, the Middle East, and the Mediterranean basin. It thrives in areas with long, hot summers and cold winters, particularly in countries like Iran, Turkey, and the United States. In the United States, cultivation is most prominent in the Central Valley of California due to the suitable climate. Beyond its natural range, it has been introduced to many other Mediterranean-style climates around the world. Its ability to tolerate drought and poor soil quality allows it to occupy specific ecological niches within these diverse geographic zones.
How is this plant cultivated?
This plant Pistacia vera, commonly known as the pistachio, requires well-drained, calcareous soils and a long, hot growing season with significant chilling hours during winter to produce high-quality nuts.
Growers must select specific cultivars to ensure both male and female trees are present for successful pollination. Irrigation management is critical, as these trees are drought-tolerant but require consistent moisture during the nut-filling stage to maximize yields. Careful pruning and pest control are necessary to maintain tree health and protect against common threats like aphids or fungal diseases.
Once the nuts reach maturity, they are harvested through mechanical shaking or manual methods before undergoing a drying process.
What parts of this plant are used medicinally?
This plant provides medicinal benefits through its fruit, kernel, resin, oil, and seed. The resin, often called mastic, is utilized for its soothing properties on the digestive tract and skin. From the fruit, the kernel and seed are extracted to provide nutrient-dense fats that support cardiovascular health. The oil derived from these components is frequently applied topically to treat inflammatory conditions. Each part works together to offer a diverse range of therapeutic applications in traditional medicine.
According to a study published by "Journal of the science of food and agriculture", pistachio kernels can be affected by A. flavus during storage at 25 °C for 18 days. This infection results in aflatoxin B1 (AFB1) accumulation in the kernels, which is hazardous to human health due to its carcinogenic activity. Treatment with BABA at 7.5 mM was investigated to minimize AFB1 accumulation and maintain nutritional quality in these fresh-in-hull pistachio kernels. Using BABA at 7.5 mM resulted in higher phenol and flavonoid accumulation and higher phenylalanine ammonia lyase (PAL) enzyme activity. This treatment also showed higher 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity in the kernels.
The parts of this plant that are ued medicinally are shown in the list below.
- fruit
- kernel
- resin
- oil
- seed
What traditional systems uses this plant?
This plant, Pistacia vera, has been cultivated for thousands of years across the Middle East and Mediterranean regions for its edible kernels and medicinal resin.
Ancient civilizations in Persia and Mesopotamia integrated the nut into their daily diets as a primary source of protein and healthy fats. Beyond nutrition, the resin derived from the plant was historically utilized in traditional medicine to treat digestive ailments and skin inflammations. In various cultural rituals, the aromatic qualities of the plant were leveraged for incense and ceremonial purposes.
These long-standing practices underscore the plant's central role in the socioeconomic and therapeutic history of the regions where it grows.
What are the pharmacological activities of Pistacia vera?
This plant has demonstrated significant pharmacological activities including anti-cancer, anti-tumor, anti-inflammatory, anti-oxidant, and hepatoprotective properties. Its high concentration of bioactive compounds allows it to neutralize free radicals, which provides a robust anti-oxidant effect. These same chemical constituents contribute to its anti-inflammatory capabilities by reducing oxidative stress in bodily tissues. Research also indicates that its extracts possess anti-tumor and anti-cancer potential by inhibiting the proliferation of malignant cells. Additionally, the plant exhibits hepatoprotective qualities that help safeguard liver functions against various forms of chemical damage.
According to a study published by "Anti-cancer agents in medicinal chemistry", pistachio pericarp extract (PPE) and pistachio kernel extract (PKE) exhibit anti-tumor activity against PC-3 prostate cancer cells. When combined with cisplatin (CP), these extracts demonstrate a greater anti-proliferative effect than when used alone. The IC50 values for PKE+CP were 4.141, 2.140, and 0.884 ug/mL after 24 h, 48 h, and 72 h of treatment, respectively. For PPE+CP, the IC50 values were 2.754, 2.061, and 0.753 ug/mL after 24 h, 48 h, and 72 h of treatment. These extracts work by modulating gene expression, specifically increasing BAX and P53 mRNA expression while decreasing BCL-2, KLK2, TNF, TGF, and NANOG.
The primary pharmacological activities of this plant are shown in the list below.
- anti-cancer
- anti-inflammatory
- anti-tumor
- antioxidant
- hepatoprotective
What medicinal compounds this plant contains?
This plant contains medicinal compounds such as flavonoid, gallic acid, phenol, catechin hydrate, and resveratrol. These bioactive substances contribute to the plant's significant antioxidant and anti-inflammatory properties. The presence of phenol and gallic acid helps neutralize free radicals within biological systems. Furthermore, the inclusion of flavonoid and catechin hydrate supports cellular protection and metabolic health. Resveratrol adds another layer of therapeutic potential by aiding in cardiovascular wellness.
According to a study published by "Journal of the science of food and agriculture", pistachio kernels can exhibit higher phenol and flavonoid accumulation when treated with 7.5 mM of BABA. These kernels, which may be infected by A. flavus during storage at 25 °C for 18 days, also show higher phenylalanine ammonia lyase (PAL) enzyme activity. This increased PAL enzyme activity promotes phenylpropanoid pathway activity in the fresh-in-hull pistachio kernels. Such chemical changes are accompanied by an increased 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity. These accumulations of phenol and flavonoid help in minimizing aflatoxin B1 (AFB1) accumulation.
The primary medicinal compounds of this plant are shown in the list below.
- flavonoid
- gallic acid
- phenol
- α-pinene
- β-pinene
What health conditions is this plant used for?
This plant is used for treating cancer, diabetes mellitus, inflammation, skin pigmentation disorders, and wound healing. Its bioactive compounds work to reduce swelling and oxidative stress throughout the body. Researchers have studied its potential to regulate blood glucose levels in patients with diabetes. The plant also contains properties that promote faster tissue regeneration and skin repair. Furthermore, certain extracts are applied topically to address irregularities in skin color and promote healthy healing.
According to a study published by "Anti-cancer agents in medicinal chemistry", Pistacia vera extracts are investigated for their anti-tumor activity and anti-carcinogenesis effects in the treatment of prostate cancer. The study focused on pistachio pericarp extract (PPE) and pistachio kernel extract (PKE) to inhibit the proliferation of PC-3 cells. When combined with cisplatin, the PKE+CP treatments showed IC50 values of 4.141, 2.140, and 0.884 ug/mL after 24 h, 48 h, and 72 h. Similarly, the PPE+CP combination resulted in IC50 values of 2.754, 2.061, and 0.753 ug/mL at the 24 h, 48 h, and 72 h time points. These extracts work by modulating the expression of genes such as BAX, P53, BCL-2, KLK2, TNF, TGF, and NANOG.
The main health conditions this plant is used for are shown in the list below.
- cancer
- diabetes mellitus
- inflammation
- oxidative stress
- wound healing
What are the herbal preparations of this plant?
This plant is used to create various medicinal preparations including MeOH extract, oil, oleo gum resin extracts, oleoresin, and tea. The methanol extract is frequently studied for its concentrated bioactive compounds and potential pharmacological properties. Culinary and therapeutic oils derived from the seeds are common in traditional medicine to soothe inflammation. The oleo gum resin extracts and concentrated oleoresin provide potent antimicrobial and healing agents. Additionally, the leaves or parts of the plant can be brewed into a tea for various internal health benefits.
According to a study published by "Acta medica Iranica", the Pistacia vera hull is traditionally used as a tonic, sedative, and antidiarrheal. The MeOH extract from Pistacia vera hull, known as MPH, was evaluated for its antioxidant and anti-tyrosinase activity. When tested on human melanoma SKMEL-3 cells after 72 h incubation, MPH at a high dose of 0.5 mg/mL demonstrated significant cytotoxic activity of approximately 63%. Additionally, the extract showed a strong anti-melanogenic effect of approximately 57% on these cells. These results suggest that MPH can serve as an effective agent for treating skin hyperpigmentation disorders such as melanoma.
The main herbal preparations of this plant are shown in the list below.
- MeOH extract
- oil
- oleo gum resin extracts
- oleoresin
- tea
What side effects this plant can have?
This plant can cause serious health complications including DNA damage, acute hepatitis, cytotoxicity, loss of appetite, and nausea. Research indicates that certain components within the species may induce cytotoxicity by destroying healthy cells within the body. These chemical interactions can lead to severe liver inflammation known as acute hepatitis. Furthermore, the consumption of toxic varieties may trigger systemic issues like DNA damage. Patients experiencing these reactions often report secondary symptoms such as intense nausea and a significant loss of appetite.
According to a study published by "Anti-cancer agents in medicinal chemistry", Pistacia vera is considered to be one of the 50 foods with the highest antioxidant effect. The n-hexane fraction of the pistachio green hull shows a higher cytotoxic effect on HT-29 cancer cells by causing oxidative stress and DNA damage. This specific fraction arrests the cell cycle at the sub-G1 phase and significantly upregulates apoptotic and autophagic gene expressions. Chemical analysis of the n-hexane fraction revealed the presence of 15 phenolic compounds, primarily gallic acid and catechin hydrate. Additionally, the extract contains 3 fatty acids, specifically 9-octadecenoic acid, 9,12-octadecadienoic acid, and hexadecenoic acid.
The main side effects this plant can have are shown in the list below.
- DNA damage
- acute hepatitis
- cytotoxicity
- loss of appetite
- nausea
What herbs are paired with Pistacia vera?
This plant pairs optimally with aromatic herbs such as rosemary, thyme, sage, and mint to enhance its natural buttery and nutty profiles.
The woody notes of rosemary and sage provide a savory contrast that complements the richness of the pistachio nut in Mediterranean dishes. Mint offers a refreshing brightness that works particularly well in sweet applications like sorbets or salads. Basil can also be used to add a subtle peppery sweetness when incorporating the plant into pesto or crusts.
These combinations leverage the aromatic oils of the herbs to balance the dense fat content of the seeds.