You have free access to this content resistance in water yam dioscorea alata cultivars in the french west indies to anthracnose disease based on tissue culturederived wholeplant assay. Philippine herbal medicines an illustrated compilation of philippine medicinal plants by dr godofredo stuart, with botanical information, chemical properties, folkloric uses and reserach studies. They were washed, peeled and sliced to the same thickness of 2 mm for drying treatments. Diabetes mellitus is a multifactorial metabolic disease characterized by postprandial hyperglycemia pphg. It is sometimes called chinese potato or by its japanese name nagaimo. Dioscorea definition of dioscorea by the free dictionary. May 15, 2018 the functional properties of starch granules define its application in food and nonfood industries. Dioscorea yams genus dioscorea plant genus a genus of plants dioscoreaceae, family dioscoreaceae, yam family yams yam plant, yam any of a.
Anthracnose colletotrichum gloeosporioides is a major limiting factor in the production of yam dioscorea spp. The plants database includes the following 30 species of dioscorea. Dioscorea elephantipes elephants foot or hottentot bread. Dioscorea villosa, the wild yam, is used as a source of topically applied cosmetics and plantderived steroids. Lloyd investigated the dioscorea subject, and found that the variety of the vine yielding the drug originally em. Tuber physiology in yams dioscorea spp and its agricultural. Dioscorea used in chinese medicine with the example of. Storage rot of some yams dioscorea spp in keffi and. The dioscorea genus contains more than 600 species, 14 of which have edible tubers. Availability of high quality sequence information is necessary for designing molecular markers associated with resistance.
As food, cassava dioscorea alata has a pretty good nutrient composition further data is presented on table 1. There is not enough reliable information about the safety of taking wild yam if you are pregnant or breast feeding. Dioscorea species, popularly known as yam worldwide and as ban aalu in odisha, india, is a prime staple medicinalfood substitute for the majority of rural and tribal people of the state of india. Besides for being source of carbohydrates, cassava dioscorea alata also contains relatively high protein.
Phytochemistry and therapeutic potential of medicinal plant. Antidiabetic activity of ethanolic extract of tubers of. Thus, although dioscorea was introduced by the thomsonian school in medicine, it became a favorite in the eclectic school, where for decades it has found a cordial reception. The plant list includes a further 316 scientific plant names of infraspecific rank for the genus dioscorea. Dioscorea oppositifolia occurs only in india 21,93. Dioscorea villosa has one of the firmest of rhizomae, it being very difficult to powder or crush. In summer the leafless plant conserves energy by dropping its leaves in october, just before the onset of the summer heat. Dioscorea is the largest genus in the dioscoreaceae family, and includes a number of economically important species including the air yam, d. Generation and analysis of expressed sequence tags ests for. Click below on a thumbnail map or name for species profiles.
Dioscorea is a genus of over 600 species of flowering plants in the family dioscoreaceae, native throughout the tropical and warm temperate regions of the world. Plants profile for dioscorea cayenensis yellow guinea yam. Resistance in water yam dioscorea alata cultivars in the. Federal government printer, lagos, nigeria, 1819, 1959. United plant savers medicinal plant conservation certificate program. A study was carried out at bimbilla in the nanumba north district of ghana to evaluate possible. Onwueme department of plant science university of ife, nigeria abstract the various physiological characteristics of the yam tuber are examined in detail under four general headings. In florida, herbarium records now reported for naturalized. A study was carried out on the storage rot of yams dioscorea spp in keffi and environs, nasarawa state.
It has no odor, and but little taste beyond a slight acridity after prolonged chewing. Herein we report the promises of dioscorea bulbifera and its bioactive principle, diosgenin as novel. Consumer information about the medication wild yam dioscorea villosa oral, includes side effects, drug interactions, recommended dosages, and storage information. Other terms for yam are true yams, greater yam, tropical yam, and name. Five5 towns, kana,kofa gwari, laminga, garaku and kokona in keffi local government area, nasarawa state, nigeria were. Dweck fls frsh frsc personal care magazine 3, 3, p. Testudinaria elephantipes, is a species of flowering plant in the genus dioscorea of the family dioscoreaceae, native to the dry interior of south africa. However, very limited sequence information pertaining to yam is available at public genome databases.
Minimizing postharvest losses in yam dioscorea spp. This study investigated the storage of seven 7 key yam varieties. Wild yam dioscorea villosa oral side effects, medical. The institute of food and agricultural sciences ifas is an equal opportunity institution authorized to provide research, educational information and other services only to individuals and institutions that function with nondiscrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. The dioscorea spp examined included dioscorea rotundata white yam, d. Postharvest microbial rot is an important disease that causes severe losses in yam dioscorea spp. Effect of the acetylation process on native starches of yam. Rot from microbial infection of healthy yam tubers reduces their table quality and renders them unappealing to consumers. General information lesser yam is a perennial, climbing plant producing annual stems about 3 metres long from a tuberous rootstock. Yams, the edible starchy tubers, are of cultural economic and nutritional importance in the tropical and subtropical. The 1980 list was based upon the work of the regional committee in southeast asia and its descriptor numbers are given in parentheses beside the present. As a staple food, the cassava dioscorea alata is boiled and consumed completed with fish and vegetable as dishes. They are mostly grown for their starchy tubers both.
The effects of the concentration of brown sugar and the. The vast majority of the species are tropical, with only a few species extending into temperate climates. Wild yam is possibly safe when taken by mouth or applied to the skin. To evaluate the antidiabetic activity of ethanolic extract of dioscorea alata in glucose loaded and alloxan induced diabetic rats. Effect of the acetylation process on native starches of yam dioscorea spp the ds corresponded to the average number of acetyl groups introduced per unit of anhydrous glucose whose molecular weight was equal to 162 units equation 2. Of the dioscorea species available in sbr, 10 species are known to be bitter in taste and unpalatable when taken raw. This study aimed to develop new single sequence repeat primers and characterize the genetic diversity of local varieties that originated in several municipalities of brazil. Approximately 600 dioscorea species are eaten in various parts of the world. Yam is the common name applied to plants of about 500 species of the genus dioscorea of the dioscoreaceae family.
Tuber physiology in yams dioscorea spp and its agricultural implications i. The plant list includes 1,192 scientific plant names of species rank for the genus dioscorea. Read more about the prescription drug wild yam dioscorea villosa oral. Thus, in this study we investigated thermal, rheological, structural and colour properties of the native and modified starch of the amazon dioscorea sp. There are several herbs derived from species of dioscorea used in chinese herb formulas, though only two are. The socalled dioscorein is not a definite principle of the rhizoma, but is simply a dried solid extract, and to call it other.
Dioscorea elephantipes is summer deciduous and is a perennial geophytic climber. Phytochemistry and therapeutic potential of medicinal. Although more than six hundred species of the tuber exist, only a few are important as staple food in the tropics. It is a perennial climbing vine, native to china and east asia. Genetic diversity among air yam dioscorea bulbifera. However, yam is susceptible to a range of serious and debilitating diseases including viruses.
Dioscorea definition of dioscorea by medical dictionary. Martini this 8year program for selecting better yam dioscorea varieties for the tropics. Nutritional and antinutritional evaluation of wild yam. Isolated starches from yams dioscorea sp grown at the.
Oct 15, 20 despite the report that the commercial starch from dioscorea spp. Among petroleum ether, ethyl acetate, methanol and 70% ethanol. Dioscorea synonyms, dioscorea pronunciation, dioscorea translation, english dictionary definition of dioscorea. Jan 22, 2014 the unweighted pair group method arithmetic averages clusters and principal component analysis for 21 landraces formed four wellseparated groups containing landraces of each of the four species, namely, dioscorea opposita thunb. Antioxidant and antiinflammatory effects of yam dioscorea.
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