Source: Wikipedia
| Watercress | |
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| Leaves | |
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| Flowers | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Brassicales |
| Family: | Brassicaceae |
| Genus: | Nasturtium |
| Species: | N. officinale
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| Binomial name | |
| Nasturtium officinale | |
| Synonyms[2] | |
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Synonymy
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Watercress or yellowcress (Nasturtium officinale) is a species of aquatic flowering plant in the cabbage family, Brassicaceae.
Watercress is a rapidly growing perennial plant native to Eurasia. It is one of the oldest known leaf vegetables consumed by humans. Watercress and many of its relatives, such as garden cress, mustard, radish, and wasabi, are noteworthy for their piquant flavors.
Description
[edit]The stems of watercress are hollow and float in water. The leaf structure is pinnately compound. Small, white, and green inflorescences are produced in clusters and are frequently visited by insects, especially hoverflies, such as Eristalis flies.[3]
Taxonomy
[edit]Watercress is listed in some sources as belonging to the genus Rorippa, although molecular evidence shows those aquatic species with hollow stems are more closely related to Cardamine than Rorippa.[4] Despite the Latin name, watercress is not particularly closely related to the flowers popularly known as nasturtiums (Tropaeolum majus). T. majus belongs to the family Tropaeolaceae, a sister taxon to the Brassicaceae within the order Brassicales.[5]
Distribution and habitat
[edit]In some regions, watercress is regarded as a weed,[6] in other regions as an aquatic vegetable or herb. Watercress has grown in many temperate locations worldwide.[7]
Watercress was introduced into China through Hong Kong and Macao in the 1800s from Europe. Its cultivation also spread to highland areas in the tropical regions of Asia.[8]
Clear fast-flowing chalk streams are the primary natural habitat for wild watercress in the United Kingdom.[9] Many settlements in England are named after watercress, from Old English êacerse, including Kersey, Kesgrave, Kersal, and Kershopefoot.[10]
Health concerns
[edit]Watercress crops grown in the presence of manure can be an environment for parasites such as the liver fluke, Fasciola hepatica.[11] Cultivated watercress has the advantage of being free of the liver fluke.[12]
When introduced into non-native environments watercress can have negative impacts on native species. With the introduction of watercress, the organic matter in the sediment increases which in turn attracts predatory macroinvertebrates that feed on other plants in the environment.[13]
By inhibiting the cytochrome P450 enzyme CYP2E1, compounds in watercress may alter drug metabolism in individuals on certain medications such as chlorzoxazone.[14]
Due to its fast-growing nature and invasive species status, Nasturtium officinale is prohibited in Illinois.[15]
Uses
[edit]Watercress leaves, stems, and fruit can be eaten raw.[16] In China watercress is often boiled alongside pork and traditional medicinal ingredients to make a wintertime tonic soup, in Vietnam it is generally used raw as a component in salads.[8]
Tradition
[edit]Ancient Romans thought eating it would cure mental illness.[17] Twelfth-century mystic Hildegard of Bingen thought eating it steamed and drinking the water would cure jaundice or fever.[17] Watercress was eaten by Native Americans.[18] Some Native Americans used it to treat kidney illnesses and constipation, and it was thought by some to be an aphrodisiac.[17] Early African Americans used the plant as an abortifacient; it was believed to cause sterility as well.[17]
Nutrition
[edit]| Nutritional value per 100 g (3.5 oz) | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Energy | 46 kJ (11 kcal) | ||||||||||||||||||||||||||||||||||||||||||||
1.29 g | |||||||||||||||||||||||||||||||||||||||||||||
| Sugars | 0.2 g | ||||||||||||||||||||||||||||||||||||||||||||
| Dietary fiber | 0.5 g | ||||||||||||||||||||||||||||||||||||||||||||
0.1 g | |||||||||||||||||||||||||||||||||||||||||||||
2.3 g | |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| Other constituents | Quantity | ||||||||||||||||||||||||||||||||||||||||||||
| Water | 95 g | ||||||||||||||||||||||||||||||||||||||||||||
| †Percentages estimated using US recommendations for adults,[19] except for potassium, which is estimated based on expert recommendation from the National Academies.[20] | |||||||||||||||||||||||||||||||||||||||||||||
The new tips of watercress leaves can be eaten raw or cooked,[21] although caution should be used when collecting these in the wild because of parasites such as giardia.[22] Watercress is 95% water and has low contents of carbohydrates, protein, fat, and dietary fiber. A 100-gram serving of raw watercress provides 46 kilojoules (11 kilocalories), is particularly rich in vitamin K (238% of the Daily Value, DV), and contains significant amounts of vitamin A, vitamin C, riboflavin, vitamin B6, calcium, and manganese (table).
Phytochemicals and cooking
[edit]As a cruciferous vegetable, watercress contains isothiocyanates that are partly destroyed by boiling, while the bioavailability of its carotenoids is slightly increased by cooking. Steaming or microwave cooking retains these phytochemicals a bit better than boiling.[23]
Cultivation
[edit]Watercress cultivation is practical on both a large scale and a garden scale. Being semi-aquatic, watercress is well-suited to hydroponic cultivation, thriving best in water that is slightly alkaline. It is frequently produced around the headwaters of chalk streams. In many local markets, the demand for hydroponically grown watercress exceeds supply, partly because cress leaves are unsuitable for distribution in dried form and can only be stored fresh for about 2–3 days.[24]
Also sold as sprouts, the edible shoots are harvested days after germination. If unharvested, watercress can grow to a height of 50 to 120 centimetres (1 ft 8 in to 3 ft 11 in).
In the United Kingdom, watercress was first commercially cultivated in 1808 by the horticulturist William Bradbery along the River Ebbsfleet in Kent. Historically important areas of cultivation also included Hampshire, Stamford, and Watercress Wildlife Site at St Albans.[12] Watercress is now grown in several counties, most notably Hampshire, Dorset, Wiltshire, and Hertfordshire. New Alresford in Hampshire is considered to be the nation's watercress capital,[25] and its railway, the Watercress Line, was named for this cargo.[12]
See also
[edit]- Fool's watercress – Apium nodiflorum
- Garden cress
- List of vegetables
- Watercress soup
References
[edit]- ^ Ghogue, J.-P.; Akhani, H. & Zehzad, B. (2020). "Nasturtium officinale". IUCN Red List of Threatened Species. 2020: e.T164311A136666515. Retrieved 21 May 2022.
- ^ The Plant List, Nasturtium officinale R.Br.
- ^ Van Der Kooi, C. J.; Pen, I.; Staal, M.; Stavenga, D. G.; Elzenga, J. T. M. (2016). "Competition for pollinators and intra-communal spectral dissimilarity of flowers" (PDF). Plant Biology. 18 (1): 56–62. doi:10.1111/plb.12328. PMID 25754608.
- ^ Al-Shehbaz, Ihsan A.; Price, Robert A. (1998). "Delimitation of the Genus Nasturtium (Brassicaceae)". Novon. 8 (2): 124–6. doi:10.2307/3391978. JSTOR 3391978.
- ^ Fay, Michael F.; Christenhusz, Maarten J.M. (14 September 2010). "Brassicales - an Order of Plants Characterised by Shared Chemistry". Curtis's Botanical Magazine. 27 (3): 165–196. doi:10.1111/j.1467-8748.2010.01695.x.
- ^ "Washington State Noxious Weed Control Board". www.nwcb.wa.gov. Retrieved 4 May 2021.
- ^ "Watercress". www.fs.fed.us. Retrieved 4 May 2021.
- ^ a b Hutton, Wendy (2004). A Cook's Guide to Asian Vegetables. Singapore: Periplus Editions. p. 54. ISBN 0794600786.
- ^ Mabey (1996, p. 147) "Water-cress was traditionally picked wild from the edges of fast-flowing streams, where it can grow in thick drifts. . .by the 19th century it was certainly under small-scale cultivation, especially in areas where there were clear chalk streams, such as Wiltshire and the north Chilterns..."
- ^ Mabey 1996, p. 147.
- ^ "DPDx - Laboratory Identification of Parasitic Diseases of Public Health Concern: Fascioliasis". US Centers for Disease Control. 29 November 2013.
- ^ a b c Mabey 1996, p. 148.
- ^ Bergey, Elizabeth A. (25 January 2024). "The impacts of non-native watercress in Oklahoma spring ecosystems". Aquatic Ecology. 58 (2): 411–427. doi:10.1007/s10452-023-10081-3. ISSN 1573-5125.
- ^ Leclercq, Isabelle; Desager, Jean-Pierre; Horsmans, Yves (1998). "Inhibition of chlorzoxazone metabolism, a clinical probe for CYP2E1, by a single ingestion of watercress". Clinical Pharmacology & Therapeutics. 64 (2): 144–9. doi:10.1016/S0009-9236(98)90147-3. PMID 9728894. S2CID 43863786.
- ^ Cao L, Berent L (30 July 2019). "Nasturtium officinale W.T. Aiton". U.S. Geological Survey. Retrieved 15 June 2022.
- ^ Benoliel, Doug (2011). Northwest Foraging: The Classic Guide to Edible Plants of the Pacific Northwest (Rev. and updated ed.). Seattle, WA: Skipstone. p. 161. ISBN 978-1-59485-366-1. OCLC 668195076.
- ^ a b c d Lyle, Katie Letcher (2010) [2004]. The Complete Guide to Edible Wild Plants, Mushrooms, Fruits, and Nuts: How to Find, Identify, and Cook Them (2nd ed.). Guilford, CN: FalconGuides. pp. 34–35. ISBN 978-1-59921-887-8. OCLC 560560606.
- ^ Nyerges, Christopher (2017). Foraging Washington: Finding, Identifying, and Preparing Edible Wild Foods. Guilford, CT: Falcon Guides. ISBN 978-1-4930-2534-3. OCLC 965922681.
- ^ United States Food and Drug Administration (2024). "Daily Value on the Nutrition and Supplement Facts Labels". FDA. Archived from the original on 27 March 2024. Retrieved 28 March 2024.
- ^ National Academies of Sciences, Engineering, and Medicine; Health and Medicine Division; Food and Nutrition Board; Committee to Review the Dietary Reference Intakes for Sodium and Potassium (2019). "Chapter 4: Potassium: Dietary Reference Intakes for Adequacy". In Oria, Maria; Harrison, Meghan; Stallings, Virginia A. (eds.). Dietary Reference Intakes for Sodium and Potassium. The National Academies Collection: Reports funded by National Institutes of Health. Washington, DC: National Academies Press (US). pp. 120–121. doi:10.17226/25353. ISBN 978-0-309-48834-1. PMID 30844154. Retrieved 5 December 2024.
- ^ Nyerges, Christopher (2016). Foraging Wild Edible Plants of North America: More than 150 Delicious Recipes Using Nature's Edibles. Rowman & Littlefield. ISBN 978-1-4930-1499-6.
- ^ Blackwell, Laird R. (2006). Great Basin Wildflowers: A Guide to Common Wildflowers of the High Deserts of Nevada, Utah, and Oregon (A Falcon Guide) (1st ed.). Guilford, Conn.: Morris Book Publishing, LLC. p. 196. ISBN 0-7627-3805-7. OCLC 61461560.
- ^ Giallourou, Natasa; Oruna-Concha, Maria Jose; Harbourne, Niamh (1 November 2016). "Effects of domestic processing methods on the phytochemical content of watercress (Nasturtium officinale)" (PDF). Food Chemistry. 212: 411–419. doi:10.1016/j.foodchem.2016.05.190. ISSN 0308-8146. PMID 27374550.
- ^ "How Long Does Fresh Watercress Last?". www.stilltasty.com. Retrieved 16 June 2022.
- ^ Peters, Rick (30 March 2010). "Seasonal food: watercress". The Guardian. Retrieved 15 December 2012.
Sources
[edit]- Mabey, Richard (1996). Flora Britannica. Sinclair-Stevenson. ISBN 1-85619-377-2.
External links
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