Murillo's-bark

Names and Synonyms

Common Names

• Murillo's-bark
• quillaja
• soapbarktree
• soapbush
• soaptree

Scientific Names

Accepted name

Synonyms

• Quillaja smegmadermos
• Leucoxyla saponaria
• Quillaja poeppigii
• Smegmadermos emarginata

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta and the class Equisetopsida. Within the subclass Magnoliidae, it is organized under the order Fabales and the family Quillajaceae. Finally, its specific taxonomic placement is within the genus Quillaja.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant, known as Quillaja saponaria, exhibits a specific distribution across the South American continent. Its presence can be observed within the borders of Bolivia in Western South America. Additionally, the species is widely found in Central Chile, which is located in Southern South America. These distinct regions define the natural range where the plant thrives in its native habitat. Consequently, its geographical footprint is concentrated in these specific southern and western territories.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Quillaja saponaria is characterized by its adaptation to specific Mediterranean-type climates, where it thrives in well-drained soils within sclerophyllous forests. This species occupies a specialized niche defined by its altitudinal distribution, typically found within an elevational range that spans from a minimum of 800 m AMSL to a maximum of 1000 m AMSL. Within these parameters, the plant interacts with a landscape defined by seasonal precipitation and moderate temperature fluctuations, playing a critical role in the structural complexity of its habitat. Its presence is often indicative of specific soil moisture regimes and environmental stability characteristic of its mid-elevation montane environment.

Elevational range max:

1000 m AMSL

Elevational range min:

800 m AMSL

Life history

The life history of Quillaja saponaria is characterized by its status as a perennial species, allowing it to persist in its environment through multiple growing seasons. As a phanerophyte, it maintains its stem system well above the ground, contributing to its structural presence in its native habitat. Specifically, its growth habit aligns with the phanerophyte life form, ensuring its long-term survival and continuous development over many years.

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Quillaja saponaria is characterized by its growth form as a woody tree, which functions as a self-supporting structure rather than a climber, liana, or vine. This species is a terrestrial plant, existing as an independent organism that does not exhibit parasitic or epiphytic behaviors, such as being a holoepiphyte or hemiepiphyte. In terms of its physical stature, it is a robust specimen with a plant height that typically ranges from a minimum of 15 m to a maximum of 20 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

20 m

Plant height min:

15 m

Woodiness :

woody

Physiology

The physiology of Quillaja saponaria is characterized by a robust metabolic framework adapted to the Mediterranean climate of its native habitat, primarily utilizing a C3 photosynthetic pathway to facilitate carbon fixation. This C3 mechanism involves the direct fixation of atmospheric carbon dioxide by the enzyme RuBisCO within the mesophyll cells, a process that is highly efficient under the temperate and cool-to-moderate temperature conditions typical of its environment. To mitigate the physiological stress imposed by seasonal water deficits, the plant employs sophisticated water-use efficiency strategies and osmotic adjustments to maintain cellular turgor. Furthermore, the plant's secondary metabolism is highly active, specifically involving the biosynthesis and sequestration of triterpenoid saponins within specialized tissues. These complex glycosides serve critical physiological roles, including acting as chemical defense mechanisms against herbivory and pathogens, as well as potentially playing a role in managing surface tension and nutrient uptake within the plant's vascular system.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Quillaja saponaria is driven by the production of small seeds that exhibit specific morphological variations in weight. Based on empirical data, the seed mass of this species is characterized by a mean value of 0.00654 g, indicating a highly consistent reproductive output. The distribution of these weights shows a narrow range, with the maximum recorded seed mass reaching 0.00714 g and the minimum seed mass measuring 0.00594 g. These precise measurements reflect the energetic investment the plant makes into its progeny, ensuring a standardized seed size within its natural reproductive cycle.

Seed mass max:

0.00714 g

Seed mass mean:

0.00654 g

Seed mass min:

0.00594 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Quillaja saponaria has 15 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Saponins, Quillaic acid, CALCIUM OXALATE, Carotenoid, Galacturonic acid.

Saponins

1. Dr. Duke
2. Expert opinion on biological therapy
3. Letters in applied microbiology
4. Natural product communications

Quillaic acid

1. Dr. Duke
2. Rapid communications in mass spectrometry : RCM

CALCIUM OXALATE

1. Dr. Duke

Carotenoid

1. Natural product communications

Galacturonic acid

1. Dr. Duke

QS-21

1. Expert opinion on biological therapy

Quil A

1. Expert opinion on biological therapy

Quillaja Saponins

1. Natural product communications

SAPONIN

1. Rapid communications in mass spectrometry : RCM

STARCH

1. Dr. Duke

Activities

Quillaja saponaria has 54 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Absorbent, Adjuvant, Anthelmintic, AntiHIV.

Antioxidant

1. Dr. Duke
2. Natural product communications
3. Antioxidants (Basel, Switzerland)

Absorbent

1. Dr. Duke

Adjuvant

1. Expert opinion on biological therapy

Anthelmintic

1. Dr. Duke

AntiHIV

1. Dr. Duke

Antibacterial

1. Dr. Duke

Anticancer

1. Dr. Duke

Anticarcinogenic

1. Natural product communications

Anticariogenic

1. Dr. Duke

Antidiarrheic

1. Dr. Duke

Conditions

Quillaja saponaria has 3 reported investigations on conditions identified across 0 scientific publications and several other databases. The most consistently reported conditions include herpes simplex virus type 1, vaccinia virus, varicella zoster virus.

Herpes simplex virus type 1

1. The Journal of general virology

Vaccinia virus

1. The Journal of general virology

Varicella zoster virus

1. The Journal of general virology

Preparations

Quillaja saponaria has 6 reported preparations identified across 0 scientific publications and several other databases. The most consistently reported preparations include Quil A, Quillaja saponaria extract, aqueous quillaja extract, concentrated saponin fractions such as QS-21, crude (food-grade) extract.

Quil a

1. Expert opinion on biological therapy

Quillaja saponaria extract

1. Expert opinion on biological therapy

Aqueous quillaja extract

1. Archives of pharmacal research

Concentrated saponin fractions such as qs-21

1. Expert opinion on biological therapy

Crude (food-grade) extract

1. Expert opinion on biological therapy

Food-grade extract

1. Expert opinion on biological therapy