Syn. : Dioscorea anthropophagum Chev.
Dioscorea haffa Cordemoy.
Dioscorea latifolia Benth.
Uses : Cultivated for the aerial bulbils which produced freely in the leaf-axils, and sometimes get as large as 2 kg., although 0.5 kg. is average size. In the best forms these aerial tubers or bulbils are said to be so succulent as to be eaten raw (perhaps dangerous) but they are more generally cooked like other yam. Some of the African forms require detoxication by soaking the sliced or pounded bulbils in water and boiling for a long time. The rhizome tubers rather tough, fibrous, and acrid, are rarely used. The Asiatic forms are usually considered superior to and less toxic than the African forms. This was probably a more important food plant in ealier times. Pakistanis use the root as a fishlure and to wash woolens. Mentioned as a weed in Polynesia, the plant has also shown some weedy tendencies in Florida. Dioscorea batatas is weedy as far north as Maryland.
Folk Medicine : Said to be alexeteric, antidotal, antiphlogistic, and hemostatic, the air potato is a folk remedy for cancer, conjunctivitis, diarrhea, dysentery, fever, goiter, hernia, piles, sores, syphilis, and tumors. “Leaf used in East Africa for pink eye”. Brazilian share with Javanese the use of the plant for diarrhea, dysentery, and syphilis. Indian apply the tuber to piles and sores. Hartwell reports the leaves are poulticed onto tumors. Roots have given positive antibiotic tests for Candida albicans.
Chemistry : Bulbils contains 4.5% diosgenin, 0.3% kryptogenin, 0.3% yamogenin. On ZMB, the root contains 386 calories, 5.2 g protein, 0.3 g fiber, 3.1 g ash, 238 mg Ca, and 100 g P. Dry aerial tubers also contain 0,09% cauoutchouc. The Wealth of India reports analyses of the tubers at 7.4-13.3% albuminoids, 3.3-7.1% ash, 0.8-1.3% fat, 75.1-85.4% carbohydrates, 3.3-9.6% fiber, 0.45-0.77% P2O2. Poisonous alkaloids, volatile acids, and calcium oxalate should be eliminated before consumption. Hager’s Handbook mentions 5.7% saponins, 0.45% diosgenin, diosbulbin-A (C20H24O7), diosbulbin-B (C19H20O6), and diosbulbin-C (C29H22O7). Tubers contain a poisonous glucoside. According to Osagie, there is 18.9 mg sterol per 100g (wet weight) tuber. Of the sterols, there is 2.2% cholesterol, 22.6% campesterol, 46.7% stigmasterol, and 28.5% beta-sitosterol. Murray et.al. report new 18-norclerodane deterpenoid, 8-epidiosbulbin E acetate, as well the norditerpenoid, diosbulbin D.
Kajian lanjut disyorkan terhadap spesies ini? Terdapat beberapa orang yang meminum air ubi ini, sembuh dari kanser rahim, kanser payu dara, cholesterol turun, darah tinggi turun, gaut lega, buasir kecut, gatal2 hilang, tenaga batin bertambah, sakit2 urat ok... dll lagi... minta kajian lebih lanjut.... kalau ok kita tanam besar2an. Ubi ini boleh kalahkan tongkat ali, kacip fatimah dll.
HjJohani
5 Mac, 2008
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