sunroot

Names and Synonyms

Common Names

• Jerusalem artichoke
• Jerusalem-artichoke
• earth-apple
• sunchoke
• Earth apple
• Sunroot

Scientific Names

Accepted name

Synonyms

• Helianthus strumosus subsp. tomentosus
• Helianthus tomentosus
• Helianthus tuberosus var. purpureus
• Helianthus tuberosus var. subcanescens
• Helianthus subcanescens
• Helianthus tuberosus f. moldenkeanus
• Helianthus serotinus
• Helianthus tuberosus f. oswaldiae
• Helianthus mollissimus
• Helianthus tuberosus var. albus
• Helianthus tuberosus var. alexandri
• Helianthus tuberosus var. fusiformis
• Helianthus tuberosus var. multituberculatus
• Helianthus tuberosus var. nebrascensis
• Helianthus tuberosus var. purpurellus
• Helianthus spathulatus

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. It is further classified within the order Asterales and the family Asteraceae. Specifically, it is identified by the genus Helianthus, which includes the species Helianthus tuberosus.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad geographical distribution across several regions of the European continent. In Northern Europe, it can be found growing in Great Britain and Ireland. Its presence extends further north into the territories of Norway and Sweden. Additionally, the species is documented within the landscape of Middle Europe, specifically in Austria. Together, these locations highlight the plant's ability to thrive in diverse European climates.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Helianthus tuberosus is characterized by its adaptability to low-altitude environments, spanning an elevational range from 0 m to a maximum of 500 m AMSL. Within these topographical limits, the species is frequently integrated into anthropogenic landscapes, as it is widely cultivated for its tubers, which serve as a valuable food plant. This cultivation tendency suggests an ecological niche that thrives in managed agricultural settings where soil conditions are optimized for tuber development.

Elevational range max:

500 m AMSL

Elevational range min:

0 m AMSL

Habitat :

cultivated for the tubers as a valuable food plant

Life history

The life history of Helianthus tuberosus is characterized by a perennial lifecycle, allowing the plant to persist through multiple growing seasons. It functions as a geophyte, utilizing specialized underground storage organs to survive unfavorable environmental conditions. Within the broader classification of its growth strategy, it is identified as a cryptophyte, ensuring its survival by keeping its regenerative buds protected at or below the soil surface. Additionally, the plant exhibits a deciduous nature, shedding its foliage as part of its seasonal biological rhythm.

Deciduousness :

deciduous

Life form :

geophyte

Life form :

cryptophyte

Lifecycle :

perennial

Morphology

The morphology of Helianthus tuberosus is characterized by its growth form as a non-woody herb, specifically classified as a forb. This terrestrial species is self-supporting rather than acting as a climber, liana, or vine, and it functions as an independent organism without parasitic tendencies. The plant exhibits a significant range in stature, with heights varying from a minimum of 1 m to a maximum of 5 m, maintaining an average plant height of approximately 2.25 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

5 m

Plant height mean:

2.25 m

Plant height min:

1 m

Woodiness :

non-woody

Physiology

The physiology of Helianthus tuberosus is characterized by a C3 photosynthetic pathway, which dictates its carbon fixation processes and metabolic efficiency. As a non-carnivorous species, it relies entirely on soil-based nutrient uptake rather than insectivory, and it does not function as a nitrogen fixer. The plant's leaf morphology displays significant variability, with leaf lengths ranging from a minimum of 3 cm to a maximum of 22.5 cm, and leaf widths spanning from 5 cm to 8 cm. These dimensions contribute to a mean leaf size of approximately 195.785 cm². Furthermore, the plant exhibits a mean Specific Leaf Area (SLA) of 310.5 cm²/g, reflecting its leaf mass per area and its strategy for optimizing light interception and gas exchange.

Carnivory :

non-carnivorous

Leaf length max:

22.5 cm

Leaf length min:

3 cm

Leaf size mean:

195.785 cm²

Leaf width max:

8 cm

Leaf width min:

5 cm

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Specific Leaf Area (SLA) mean:

310.5 cm²/g

Reproduction

The reproduction of Helianthus tuberosus is primarily sexual, characterized by bisexual flowers that facilitate the production of offspring. The flowering period typically begins in August and extends through November. Pollination is driven by biotic mechanisms, specifically utilizing an insect pollination syndrome to ensure fertilization, though the plant is also capable of self-fertilization. Following successful pollination, the plant produces fruit in the form of an achene, which is indehiscent in nature. These fruits have an average length of 0.5 cm and contain a high density of seeds, with a yield ranging from 101 to 1,000 seeds per fruit. The seeds themselves are quite small, with a mean mass of approximately 0.004527 g, ranging from a minimum of 0.002 g to a maximum of 0.00558 g. Seed dispersal is categorized as unspecialized, though it also exhibits anthropochorous tendencies, meaning it can be dispersed via human activity. Notably, asexual reproduction is absent in this species.

Dehiscence :

indehiscent

Dispersal syndrome :

unspecialized

Dispersal syndrome :

anthropochorous

Flowering time :

Aug

Flowering time :

Nov

Fruit length mean:

0.5 cm

Fruit type :

achene

Pollination syndrome :

insect

Pollination syndrome :

biotic

Reproduction asexual :

absent

Reproduction sexual :

bisexual

Seed mass max:

0.00558 g

Seed mass mean:

0.00452666666666667 g

Seed mass min:

0.002 g

Seeds_per_fruit :

101-1000

Self fertilization :

present

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Helianthus tuberosus has 63 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include INULIN, 2,7(14),9-Bisabolatrien-11-ol, Al, Ash, BORON.

INULIN

1. Dr. Duke
2. Cellular and molecular biology (Noisy-le-Grand, France)

2,7(14),9-Bisabolatrien-11-ol

1. Dr. Duke

Al

1. Plant foods for human nutrition (Dordrecht, Netherlands)

Ash

1. Dr. Duke

BORON

1. Dr. Duke

CA

1. Plant foods for human nutrition (Dordrecht, Netherlands)

CALCIUM

1. Dr. Duke

CATALASE

1. Dr. Duke

COPPER

1. Dr. Duke

CR

1. Plant foods for human nutrition (Dordrecht, Netherlands)

Activities

Helianthus tuberosus has 377 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Antidiabetic, ACE-Inhibitor, Abortifacient, Absorbent.

Antioxidant

1. Dr. Duke
2. Journal of ethnopharmacology
3. Cellular and molecular biology (Noisy-le-Grand, France)
4. Pharmaceutics

Antidiabetic

1. Dr. Duke
2. Journal of ethnopharmacology
3. Cellular and molecular biology (Noisy-le-Grand, France)

ACE-Inhibitor

1. Dr. Duke

Abortifacient

1. Dr. Duke

Absorbent

1. Dr. Duke

Acetylcholinergic

1. Dr. Duke

Acidulant

1. Dr. Duke

Acnegenic

1. Dr. Duke

Alcohol-Dehydrogenase-Inhibitor

1. Dr. Duke

Aldose-Reductase-Inhibitor

1. Dr. Duke

Medicinal Uses

Helianthus tuberosus has 13 reported medicinal uses identified across 0 scientific publications and several other databases. The most consistently reported uses include acne, antidiabetic, breast cancer, cardiovascular diseases, chronic fatigue syndrome.

Most Reported Uses

Preparations