Bok choy

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Bok choy
Bok Choy (49553125456).jpg
Brassica rapa subsp. chinensis
Species Brassica rapa
Cultivar group Chinensis
Origin China, 5th century AD [1]

Bok choy (American English, Canadian English, and Australian English), pak choi (British English, South African English, and Caribbean English) or pok choi is a type of Chinese cabbage ( Brassica rapa subsp. chinensis) cultivated as a leaf vegetable to be used as food. Varieties do not form heads and have green leaf blades with lighter bulbous bottoms instead, forming a cluster reminiscent of mustard greens. Its flavor is described as being between spinach and water chestnuts but slightly sweeter, with a mildly peppery undertone. The green leaves have a stronger flavor than the white bulb. [2] [3]

Contents

Chinensis varieties are popular in southern China, East Asia, and Southeast Asia. Being winter-hardy, they are increasingly grown in Northern Europe.[ citation needed ] Originally classified as Brassica chinensis by Carl Linnaeus,[ citation needed ] they are now considered a subspecies of Brassica rapa.They are a member of the family Brassicaceae.

Spelling and naming variations

Bok choy cooks in 2 to 3 minutes by steaming, stir-frying, or simmering in water (8 minutes if steamed whole). The leaves cook faster than the stem. It is often used in similar ways to other leafy vegetables such as spinach and cabbage. [9] It can also be eaten raw. [10] It is commonly used in salads.

Preserving

Dried bok choy is saltier and sweeter. Pickled bok choy remains edible for months. [11] Immature plants have the sweetest, tenderest stems and leaves. [12]

Nutritional value

Cooked bok choy
Bokchoycooked.jpg
Bok choy, raw
(chinensis, pak choi)
Nutritional value per 100 g (3.5 oz)
Energy 54 kJ (13 kcal)
2.2 g
Dietary fiber 1.0 g
Fat
0.2 g
1.5 g
Vitamins and minerals
Vitamins Quantity
%DV
Vitamin A equiv.
27%
243 μg
25%
2681 μg
Thiamine (B1)
3%
0.04 mg
Riboflavin (B2)
5%
0.07 mg
Niacin (B3)
3%
0.5 mg
Pantothenic acid (B5)
2%
0.09 mg
Vitamin B6
11%
0.19 mg
Folate (B9)
17%
66 μg
Vitamin C
50%
45 mg
Vitamin K
38%
46 μg
Minerals Quantity
%DV
Calcium
8%
105 mg
Iron
4%
0.80 mg
Magnesium
5%
19 mg
Manganese
7%
0.16 mg
Potassium
8%
252 mg
Sodium
3%
65 mg
Other constituentsQuantity
Water95.3 g

Percentages estimated using US recommendations for adults, [13] except for potassium, which is estimated based on expert recommendation from the National Academies. [14]

The raw vegetable is 95% water, 2% carbohydrates, 1% protein and less than 1% fat. In a 100-gram (3+12-ounce) reference serving, raw bok choy provides 54 kilojoules (13 food calories) of food energy and is a rich source (20% or more of the Daily Value, DV) of vitamin A (30% DV), vitamin C (54% DV) and vitamin K (44% DV), while providing folate, vitamin B6 and calcium in moderate amounts (10–17% DV).

History

Bok choy evolved from the mustard plant in China, where it has been cultivated since the 5th century CE. [1] It can be traced to the Yangtze River delta area, one of the world's oldest agricultural regions. [15] It also has been traced to the Yellow River Valley where archaeologists found Chinese cabbage seeds dating back 6,000 years. [16]

As bok choy grew in use, it spread to other parts of Asia and was eventually cultivated in countries such as Japan, Malaysia, Indonesia, and the Philippines. Bok choy plantations were present in Japan and Malaya by the early 19th century. In Malaya, bok choy was not commonly consumed by the poor. [17]

The vegetable was introduced to Europe in the mid-18th century. A Swede named Osbeck brought bok choy seeds to Europe during the same time period Jesuit missionaries brought similar strains of the vegetable to German scientists working in Russia. [17] Bok choy was introduced to North America in the 19th century, but did not gain in use for another century. [17]

See also

References

  1. 1 2 Sanderson, Helen; Renfrew, Jane M. (2005). Prance, Ghillean; Nesbitt, Mark (eds.). The Cultural History of Plants. Routledge. p. 115. ISBN   0415927463.
  2. "What Does Pak Choi Taste Like?". Thrive Cuisine. 2 March 2019. Retrieved 13 December 2021.
  3. "Genetic Characterization of Brassica rapa chinensis L.,B. rapa parachinensis (L. H. Bailey) Hanelt, and B. oleracea alboglabra (L. H. Bailey) Hanelt Using Simple Sequence Repeat Markers" (PDF). Philippine Journal of Science. December 2009. Retrieved 16 February 2023.
  4. "Brassica rapa var. glabra in Flora of China". efloras.org. Retrieved 2022-04-28.
  5. "Regular vs. Shanghai Baby Bok Choy | Cook's Illustrated".
  6. "Help is on the way for consumers confused by the wide array of Asian vegetables on sale". 2009-10-22. Archived from the original on 2007-08-20. Retrieved 2011-09-08.
  7. "Asian vegetable names" (PDF). Archived (PDF) from the original on 2006-10-30.
  8. Ekman, Jenny (October 2008). "Improving Market Access for Asian Vegetables" (PDF). Rural Industries Research and Development Corporation. Retrieved 2023-12-06.
  9. "Pak choi". BBC Good Food. Retrieved 2 February 2022.
  10. Smith, Emma (6 August 2023). "Can You Eat Bok Choy Raw". Leftover Guide. Retrieved 7 August 2023.
  11. "6 Ways to Store Bok Choy so It Lasts Longer". Homestratosphere. 20 May 2019. Retrieved 20 February 2023.
  12. "Harvesting Bok Choy Plants: How And When To Pick Bok Choy". Gardening Know How. 29 July 2012. Retrieved 20 February 2023.
  13. United States Food and Drug Administration (2024). "Daily Value on the Nutrition and Supplement Facts Labels". FDA. Archived from the original on 2024-03-27. Retrieved 2024-03-28.
  14. 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 2024-12-05.
  15. "Bok Choy". North Coast Growers' Association. Retrieved 2025-01-28.
  16. Features, Mary H. Dyer last updated in (2018-11-29). "Bok Choy History And Uses". gardeningknowhow. Retrieved 2025-01-28.
  17. 1 2 3 "Pak Choi". National Library Board, Singapore. Retrieved 2025-01-28.
  18. "National Treasure Diaporama—Qing dynasty Jadeite Cabbage". National Palace Museum. 2017.