Sour Pickle

Names and Synonyms

Common Names

• Sour Pickle
• tuna

Scientific Names

Accepted name

Synonyms

• Cactus opuntia var. tuna
• Opuntia dillenii subsp. melanosperma
• Cactus dillenii
• Opuntia zebrina
• Opuntia melanosperma
• Opuntia stricta var. dillenii
• Opuntia dillenii var. minor
• Opuntia dillenii var. orbiculata
• Cactus tuna
• Opuntia maritima
• Opuntia dillenii

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and the class Equisetopsida. It is further classified under the subclass Magnoliidae and the order Caryophyllales, falling into the family Cactaceae. Ultimately, its taxonomic identity is defined by the genus Opuntia.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a widespread distribution across several key regions of the Mediterranean basin. In Southwestern Europe, it can be found growing throughout the territories of France, Portugal, and Spain. Its presence also extends into Southeastern Europe, specifically within the country of Italy. Furthermore, the species is well-established in Northern Africa, particularly in Tunisia. These diverse locations highlight the plant's adaptability to the Mediterranean climate.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Opuntia tuna is characterized by its adaptation to specific environmental niches, typically thriving at a mean elevation of 240 m AMSL. This species is strategically equipped with morphological adaptations for survival in its habitat, most notably regarding its defense mechanisms; it possesses a varied presence of defensive structures, meaning the expression of these traits can be categorized as yes or no depending on the specific specimen or environmental stress levels encountered. These defenses are crucial for protecting its succulent tissues from herbivory within its ecological zone.

Defense :

yes

Elevational range mean:

240 m AMSL

Life history

The life history of Opuntia tuna is characterized by its nature as a perennial plant, allowing it to persist through multiple growing seasons and establish a stable presence in its habitat. As an evergreen species, it maintains its fleshy, photosynthetic cladodes throughout the year, providing a continuous source of energy and structural stability regardless of seasonal shifts. This combination of a long-lived lifecycle and constant foliage enables the plant to endure varying environmental conditions while maintaining its physiological functions over an extended period.

Deciduousness :

evergreen

Lifecycle :

perennial

Morphology

The morphology of Opuntia tuna is characterized by a shrubby growth form, typically manifesting as a self-supporting plant that does not rely on climbing structures. It functions as an independent organism, existing as a terrestrial species rather than an aquatic, semiaquatic, or epiphytic one. The plant exhibits variable woodiness in its structure, with a physical stature that reaches a mean height of approximately 1 meter, though it can attain a maximum height of up to 2 meters.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

shrub

Parasite :

independent

Plant height max:

2 m

Plant height mean:

1 m

Woodiness :

variable

Physiology

The physiology of Opuntia tuna is characterized by specialized adaptations for survival in arid environments, most notably through Crassulacean Acid Metabolism (CAM), which allows the plant to fix carbon dioxide at night to minimize transpirational water loss. This metabolic pathway enables the plant to maintain high water-use efficiency by keeping stomata closed during the heat of the day. The plant's anatomy features succulent, cladode-like stems that serve as primary photosynthetic organs and water storage reservoirs, facilitating drought tolerance. Regarding nutrient cycling, Opuntia tuna is not a nitrogen fixer; it lacks the symbiotic relationship with diazotrophic bacteria necessary to convert atmospheric nitrogen into usable forms, meaning its nitrogen uptake is dependent on the availability of nitrates or ammonium within the soil substrate. Its physiological processes are further defined by a robust root system capable of rapid moisture absorption following infrequent rainfall events, supporting its overall metabolic demands in nutrient-poor soils.

Nitrogen fixer :

no

Reproduction

The reproduction of Opuntia tuna is characterized by a specific flowering and fruiting cycle that relies on the development of distinct floral and fruit structures. The flowering period typically commences in May and concludes in September, though the timing can be variable throughout the year. During this stage, the plant produces flowers that can reach a maximum width of 5 cm and are distinguished by their vibrant orange colour. Following pollination, the plant develops fleshy fruits that range in length from a minimum of 5 cm to a maximum of 7.5 cm. These fruits also exhibit a variation in width, spanning from 3.5 cm to a maximum of 5 cm, and are characterized by a green colour during their development.

Flower colour :

orange

Flower width max:

5 cm

Flowering time :

May

Flowering time :

Sep

Fruit colour :

green

Fruit length max:

7.5 cm

Fruit length min:

5 cm

Fruit width max:

5 cm

Fruit width min:

3.5 cm

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Opuntia tuna has 2 reported plant parts identified across 3 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include seed, fruit.

Seed

1. TheScientificWorldJournal
2. Molecules (Basel, Switzerland)

Fruit

1. Journal of pharmacopuncture

Chemicals

Opuntia tuna has 15 reported phytochemicals identified across 3 scientific publications and several other databases. The most consistently reported chemicals include ascorbic acid, (E)-Ferulic acid, Betalains, Betanin, CATECHIN.

ascorbic acid

1. Journal of pharmacopuncture
2. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

(E)-Ferulic acid

1. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Betalains

1. Journal of pharmacopuncture

Betanin

1. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

CATECHIN

1. Natural product research

Daucosterol

1. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Flavonoids

1. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

L-(-)-Malic acid

1. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Melanin

1. Scientific reports

Opuntiol

1. Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Activities

Opuntia tuna has 11 reported activities identified across 3 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Antibacterial, Hepatoprotective, Hypotensive, Neuroprotective.

Antioxidant

1. Natural product research
2. Journal of pharmacopuncture
3. TheScientificWorldJournal
4. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Antibacterial

1. Natural product research
2. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Hepatoprotective

1. Journal of pharmacopuncture
2. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Hypotensive

1. Journal of pharmacopuncture
2. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Neuroprotective

1. Journal of pharmacopuncture
2. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Anticancer

1. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Antidiabetic

1. Phytomedicine : international journal of phytotherapy and phytopharmacology

Antifungal

1. Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society

Antihyperglycemic

1. Phytomedicine : international journal of phytotherapy and phytopharmacology

Antihyperlipidemic

1. TheScientificWorldJournal

Preparations