Japanese pepper

Names and Synonyms

Common Names

• Japanese-pepper
• Korean pepper
• chopi

Scientific Names

Accepted name

Synonyms

• Zanthoxylum ovalifoliolatum
• Fagara piperita
• Zanthoxylum piperitum f. hispidum
• Zanthoxylum piperitum f. rotundatum
• Zanthoxylum piperitum var. hispidum
• Zanthoxylum piperitum var. inerme
• Zanthoxylum piperitum var. brevispinum
• Zanthoxylum piperitum f. brevispinum
• Zanthoxylum piperitum f. ovalifoliolatum
• Zanthoxylum piperitum f. inerme
• Zanthoxylum piperitum f. corticosum
• Zanthoxylum piperitum f. verrucatum
• Zanthoxylum piperitum var. spinosum

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. Within the order Sapindales, it is classified in the family Rutaceae. It is further categorized under the genus Zanthoxylum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is primarily distributed across several key regions in Eastern Asia. It can be found growing naturally throughout the various islands and mainland areas of Japan. Its presence is also well-documented across the Korean Peninsula. Moving toward the Indian Subcontinent, the species extends into the mountainous terrain of the East Himalaya. These specific locations define the core geographical range for this medicinal species.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Zanthoxylum piperitum is characterized by its classification as a phanerophyte, as it survives the unfavorable seasons with its buds located well above the ground on woody stems. Within its ecological development, it primarily functions as a phanerophyte, establishing a perennial woody structure that allows it to persist through diverse seasonal changes. While its primary growth habit aligns with the phanerophyte life form, it does not exhibit the characteristics of a nanophanerophyte, chamaephyte, hemicryptophyte, geophyte, hydrophyte, helophyte, therophyte, or lithophyte in its mature state. Instead, it focuses its energy on the development of robust, perennial woody branches that support its reproductive cycle, ensuring long-term survival in its native habitats.

Life form :

nanophanerophyte

Life form :

phanerophyte

Morphology

The morphology of Zanthoxylum piperitum is characterized by its growth form as a tree, which develops a robust and substantial structure over time. As a terrestrial species, it grows directly in the soil rather than relying on other plants for support, establishing a permanent presence in its native habitat. The plant exhibits a woody nature, possessing a firm, lignified stem and branches that provide the necessary structural integrity for its arboreal habit.

Epiphyte :

terrestrial

Growth form :

tree

Woodiness :

woody

Physiology

The physiology of Zanthoxylum piperitum is characterized by a metabolic framework driven by a C3 photosynthetic pathway, which governs its carbon fixation processes and energy production. As a C3 plant, it utilizes the enzyme Rubisco to fix atmospheric carbon dioxide directly into a three-carbon compound during the Calvin cycle, a process that is highly efficient under temperate and moist environmental conditions but necessitates careful regulation of stomatal conductance to balance gas exchange with transpiration. This photosynthetic mechanism supports the complex secondary metabolism of the species, facilitating the synthesis of diverse bioactive alkaloids and essential oils, such as sanshool, which are integrated into its physiological defense systems. Furthermore, its physiological resilience is tied to its ability to manage water use efficiency and nutrient uptake to sustain the energetic demands of both vegetative growth and the production of its characteristic aromatic chemical constituents.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Zanthoxylum piperitum is characterized by the production of fleshy fruits that contain specialized seeds. These seeds exhibit high uniformity in their physical dimensions, maintaining a consistent seed volume with a mean, maximum, and minimum value of 11 mm³. In terms of weight, the seeds are also highly standardized, possessing a singular recorded seed mass of 0.0235 g, which serves as both the minimum and maximum value. The fruit structure itself is described as fleshy, a trait that typically facilitates seed dispersal through various biological mechanisms.

Fruit dryness :

fleshy

Seed mass mean:

0.0235 g

Seed volume max:

11 mm³

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Zanthoxylum piperitum has 2 reported plant parts identified across 2 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include fruit, seed.

Fruit

1. Plants (Basel, Switzerland)

Seed

1. Plants (Basel, Switzerland)

Chemicals

Zanthoxylum piperitum has 14 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include BETA-PHELLANDRENE, CATECHIN, Gallic acid, LIMONENE, METHYL GALLATE.

BETA-PHELLANDRENE

1. Evidence-based complementary and alternative medicine : eCAM

CATECHIN

1. The American journal of Chinese medicine

Gallic acid

1. The American journal of Chinese medicine

LIMONENE

1. Fitoterapia

METHYL GALLATE

1. The American journal of Chinese medicine

Quercetin 3-O-alpha-L-rhamnoside

1. The American journal of Chinese medicine

Quercetin 3-O-beta-D-galactoside

1. The American journal of Chinese medicine

Quercetin-3-o-rutinose

1. The American journal of Chinese medicine

Rosamultin

1. The American journal of Chinese medicine

beta-Myrcene

1. Fitoterapia

Activities

Zanthoxylum piperitum has 1 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Antinociceptive.

Antinociceptive

1. Evidence-based complementary and alternative medicine : eCAM

Conditions

Zanthoxylum piperitum has 10 reported investigations on conditions identified across 2 scientific publications and several other databases. The most consistently reported conditions include alveolar bone loss, coronary heart disease, dyslipidemia, glutamate, hypertension.

Alveolar bone loss

1. Journal of ethnopharmacology

Coronary heart disease

1. International journal of molecular medicine

Dyslipidemia

1. International journal of molecular medicine

Glutamate

1. Evidence-based complementary and alternative medicine : eCAM

Hypertension

1. International journal of molecular medicine

Lipid peroxidation

1. The American journal of Chinese medicine

Obesity

1. International journal of molecular medicine

Pain

1. Plants (Basel, Switzerland)

Toothache

1. Journal of ethnopharmacology

Type 2 diabetes

1. International journal of molecular medicine

Preparations

Zanthoxylum piperitum has 2 reported preparations identified across 2 scientific publications and several other databases. The most consistently reported preparations include Essential oils, extracts of Z. piperitum fruits.

Essential oils

1. Fitoterapia

Extracts of z. piperitum fruits

1. Plants (Basel, Switzerland)