Dioscorea japonica

Dioscorea japonica
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
Order:	Dioscoreales
Family:	Dioscoreaceae
Genus:	Dioscorea
Species:	D. japonica
Binomial name
	Dioscorea japonica; Thunb. 1784

Dioscorea japonica (yamaimo, Japanese mountain yam) is a type of yam (Dioscorea) native to Japan (including Ryukyu and Bonin Islands), Korea, China (including Taiwan), and Assam.^[1]^[2]

Dioscorea japonica is used for food. Jinenjo, also called wild yam is related variety of Japanese yam that is used as an ingredient in soba noodles.

Names

In Japanese, it is known as yamaimo ^[3] (literally mountain yam; kanji: 山芋 hiragana: やまいも).

Jinenjyo (literally wild yam; kanji: 自然薯; hiragana: じねんじょ) is another kind of Dioscorea japonica, which is native to fields and mountains in Japan.

In Chinese it is known as Rìběnshǔyù (literally Japanese Yam; 日本薯蓣^[2])

In Korean it is known as cham ma 참마, as well as dang ma 당마.^{[citation needed]}

Chemistry

Dioscorea japonica contains the antimutagenic compounds eudesmol and paeonol.^[4]

Varieties

Several formal botanical varieties have been proposed. Four are accepted:^[1]^[2]

Dioscorea japonica var. japonica - Japan, Korea, Ryukyu, Bonin, Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, Taiwan, Zhejiang
Dioscorea japonica var. nagarum Prain & Burkill - Assam
Dioscorea japonica var. oldhamii R.Knuth - Guangdong, Guangxi, Taiwan
Dioscorea japonica var. pilifera C.T.Ting & M.C.Chang - Anhui, Fujian, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Zhejiang

References

^ ^a ^b Kew World Checklist of Selected Plant Families
^ ^a ^b ^c "Dioscorea japonica in Flora of China @ efloras.org:". Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. Retrieved 21 January 2012.
^ Ohwi, Jisaburo (1965). Meyer, Frederick G.; Walker, Egbert H. (eds.). Flora of Japan. Washington, DC: Smithsonian Institution. p. 314. OCLC 742327504. Retrieved 21 January 2012.
^ Antimutagenic Activity of (+)-β-Eudesmol and Paeonol from Dioscorea japonica. Mitsuo Miyazawa, Hideo Shimamura, Sei-ichi Nakamura and Hiromu Kameoka, J. Agric. Food Chem., 1996, 44 (7), pages 1647–1650, doi:10.1021/jf950792u

This botany article is a stub. You can help Wikipedia by expanding it.

[asdfasdfaasfd-1] Kew World Checklist of Selected Plant Families

[ChinaFlora-2] "Dioscorea japonica in Flora of China @ efloras.org:". Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. Retrieved 21 January 2012.

[FloraJapan-3] Ohwi, Jisaburo (1965). Meyer, Frederick G.; Walker, Egbert H. (eds.). Flora of Japan. Washington, DC: Smithsonian Institution. p. 314. OCLC 742327504. Retrieved 21 January 2012.

[4] Antimutagenic Activity of (+)-β-Eudesmol and Paeonol from Dioscorea japonica. Mitsuo Miyazawa, Hideo Shimamura, Sei-ichi Nakamura and Hiromu Kameoka, J. Agric. Food Chem., 1996, 44 (7), pages 1647–1650, doi:10.1021/jf950792u

[1]

[2]

[3]

[4]