Episode 2273
Dioscorea mexicana
Tue, 2023-Jul-25 00:13 UTC
Length - 2:11
Direct Link
Welcome to random Wiki of the Day where we read the summary of a random Wikipedia page every day.
The random article for Tuesday, 25 July 2023 is Dioscorea mexicana.
Dioscorea mexicana, Mexican yam or cabeza de negro is a species of yam in the genus Dioscorea. Dioscorea mexicana is a caudiciform dioscorea having either a partly to completely above-ground dome-shaped caudex with a thick, woody outer layer up to 3 feet (90 cm) in diameter and 8–10 inches (20 to 25 cm) in height. The caudex of D. mexicana is divided into regular polygonal plates that become protuberant with age, and separated by deep fissures. The vigorous annual vines which may reach 30 feet (9 m) long before dying back in winter, that grow up from the caudex, bear heart-shaped leaves. Dioscorea mexicana ranges from the state of San Luis Potosí in northeastern Mexico south to Panama. It is notable for its production of diosgenin, which is a precursor for the synthesis of hormones such as progesterone. Russell Marker developed the extraction and manufacture of hormones from D. mexicana at Syntex. Later the Mexican barbasco trade focused instead on Dioscorea composita instead, as this variety has a higher diosgenin content.
This recording reflects the Wikipedia text as of 00:13 UTC on Tuesday, 25 July 2023.
For the full current version of the article, see Dioscorea mexicana on Wikipedia.
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