1 The Papaloapan, Poverty, and a Wild Yam

2020 ◽  
pp. 23-38
Keyword(s):  
Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
SH Dong ◽  
D Nikolic ◽  
C Simmler ◽  
F Qiu ◽  
RB van Breemen ◽  
...  
Keyword(s):  

Author(s):  
T Estiasih ◽  
Irawati ◽  
D E Kuliahsari ◽  
V T Widayanti
Keyword(s):  

2009 ◽  
Vol 37 (01) ◽  
pp. 159-167 ◽  
Author(s):  
Mi-Kyung Park ◽  
Hyeok-Yi Kwon ◽  
Woong-Shick Ahn ◽  
Sumi Bae ◽  
Mee-Ra Rhyu ◽  
...  

We studied the estrogenic activity and cellular effect of wild yam extract in MCF-7 human breast cancer cells. The extract increased the activity of the progesterone receptor and pS2 genes at the mRNA levels in human breast cancer MCF-7 cells, although the effects were not as prominent as those of 17β-estradiol (E2). Western blot analysis showed that the level of estrogen receptor α protein was down-regulated after treatment with E2 or wild yam extract. Wild yam extract also inhibited proliferation of MCF-7 cells. These data indicate that wild yam extract acts as a weak phytoestrogen and protects against proliferation in human breast carcinoma MCF-7 cells.


2015 ◽  
Vol 17 (1) ◽  
pp. 9-17 ◽  
Author(s):  
Víctor Andrés Ramos Duarte ◽  
Silvia Lizette Bustamante, R. ◽  
Javier Rincón Velandia ◽  
Maritza Adelina Rojas Cardozo ◽  
Lauren Raz ◽  
...  

<strong><strong>Título en ingles: Identification, <em>in vitro</em> establishment and preliminary phytochemical analysis of wild yam (<em>Dioscorea spp</em>.) used for medicinal purposes</strong></strong><p><strong><strong><strong>Título corto: Identificación, establecimiento <em>in vitro </em>y análisis fitoquímico preliminar de especies silvestres de ñame</strong></strong></strong></p><p><strong>Resumen:  </strong>Tubérculos del género<em> Dioscorea </em>comercializados con fines medicinales, fueron recolectados con el propósito de lograr su establecimiento a condiciones <em>in vitro. </em>Previamente se lograron identificar taxonómicamente las especies y por medio de análisis fitoquímicos demostrar su potencial farmacéutico. El material recolectado fue identificado como <em>Dioscorea coriacea, D. lehmannii, D. meridensis, D. polygonoides </em>y una especie comestible<em> D. trifida</em>. Tubérculos recolectados de centros de acopio y traídos de campo fueron lavados, desinfectados, asperjados con Ácido Giberélico (AG<sub>3</sub>) y sembrados en sustrato BM-2®, en invernadero a 18°C día y 10°C noche. Los tubérculos completos o por secciones fueron almacenados en bolsas herméticas a temperatura ambiente. Posteriormente se desinfectó material vegetal de las especies <em>D. coriacea, D. lehmannii, D. meridensis y D polygonoides, </em>seleccionando explantes de brotes sanos (<em>D. coriacea / </em>laboratorio) para su establecimiento. Se evaluaron tres medios de cultivo para establecimiento, el que presentó los mejores resultados fue Medio Murashige &amp; Skoog (1962) suplementado con BAP 1 mL/L, AG<sub>3</sub> 1 mL/L y Putrescina 2 mL/L. Para la extracción y análisis de metabolitos secundarios se utilizaron tubérculos de <em>D. coriacea, D. lehmannii</em> y <em>D. polygonoides</em>, empleando como solvente de extracción metanol. Se  encontró mayor concentración de extracto vegetal en <em>D. coriacea </em>(54%), y mediante cromatografía en capa delgada (CCD), se confirmó la presencia de saponinas, que resultó mayor en comparación con <em>D. polygonoides</em> especie reconocida por su alto contenido de saponinas. Estos resultados permitirán realizar análisis más avanzados de los compuestos presentes y plantear su propagación masiva en condiciones <em>in vitro</em>. </p><p><strong>Palabras clave:</strong> diosgenina, micropropagación, ñame silvestre, cultivo de tejidos vegetales, saponinas, fitoquímica.</p><p><strong>Abstract:  </strong>Wild tubers of the genus<em> Dioscorea</em> sold for medicinal use were collected for the purpose of achieving its establishment under <em>in vitro</em> conditions. First we taxonomically identified the species and through phytochemical analysis demonstrated pharmaceutical potential. The material collected was identified as <em>Dioscorea coriacea</em>, <em>D. lehmannii</em>, <em>D. meridensis</em>, <em>D. polygonoides</em> and the edible species <em>D. trifida</em>. Tubers collected from wholesale distributors and from the field were washed, disinfected, sprayed with Gibberellic Acid (GA<sub>3</sub>) and planted in substrate BM-2®, in a greenhouse at 18 ° C during the day and 10 ° C overnight. Whole tubers or sections thereof were stored in sealed bags at room temperature. Subsequently plant material of the species <em>D. coriacea, D. lehmannii, D. </em>meridensis<em> </em>and<em> D. polygonoides</em> was disinfected and healthy buds (<em>D. coriacea</em> / laboratory) were selected for <em>in vitro</em> establishment. Three different culture media were evaluated for establishment; that which presented the best results was the Murashige &amp; Skoog (1962) medium, supplemented with BAP 1 mL / L, GA<sub>3</sub> 1 mL / L and Putrescin 2 mL / L. For the collection and analysis of secondary metabolites, tubers of <em>D. coriacea</em>, <em>D. lehmannii</em> and <em>D. polygonoides</em> were used, using methanol as the extraction solvent. The highest concentration of plant extract, 54%, was found in<em> D. coriacea</em>, a higher value than that of <em>D. polygonoides, </em>which had been reported previously; the presence of saponins was confirmed by thin layer chromatography (TLC). These results will enable more advanced analysis of the present compounds and enhance their mass propagation under <em>in vitro</em> conditions.</p><p><strong>Key words:</strong> diosgenin, micropropagation, wild yam, tissue culture, saponins, phitochemistry.</p><p><strong>Recibido: </strong>agosto 20 de 2014<strong>      Aprobado: </strong>abril 20 de 2015</p>


Fitoterapia ◽  
2013 ◽  
Vol 91 ◽  
pp. 113-124 ◽  
Author(s):  
Shi-Hui Dong ◽  
Geping Cai ◽  
José G. Napolitano ◽  
Dejan Nikolić ◽  
David C. Lankin ◽  
...  
Keyword(s):  

2013 ◽  
Vol 76 (10) ◽  
pp. 2005-2007 ◽  
Author(s):  
Shi-Hui Dong ◽  
Dejan Nikolić ◽  
Charlotte Simmler ◽  
Feng Qiu ◽  
Richard B. van Breemen ◽  
...  
Keyword(s):  

2003 ◽  
Vol 3 (4) ◽  
pp. 77-91 ◽  
Author(s):  
Catherine Ulbricht ◽  
Ethan Basch ◽  
David Sollars ◽  
Paul Hammerness ◽  
Sadaf Hashmi
Keyword(s):  

Genome ◽  
1994 ◽  
Vol 37 (5) ◽  
pp. 794-801 ◽  
Author(s):  
Ryohei Terauchi ◽  
Akihiro Konuma

Six microsatellite loci were characterized in Dioscorea tokoro, a wild yam species in East Asia. All six loci were polymorphic in a sample of 23 individuals from natural populations in Japan. The microsatellite loci displayed many alleles (6.2 alleles per locus on average), and the observed heterozygosity (Ho = 0.54) as well as expected heterozygosity (He = 0.68) were high. The heterozygosities were far more than that previously detected by allozyme analysis of D. tokoro (Ho = 0.23, He = 0.28). Five microsatellite loci were sufficient to provide a paternity exclusion rate (Q) of Q = 0.98, which enables monitoring of the pollen-mediated gene flow between plants in a population. Microsatellite loci are abundant and highly polymorphic in D. tokoro and other plants and are therefore ideal markers for plant population genetic studies.Key words: microsatellite, simple sequence repeat, population genetics, Dioscorea tokoro.


JAMA ◽  
1989 ◽  
Vol 262 (12) ◽  
pp. 1610 ◽  
Author(s):  
JOHN V. SHOEMAKER
Keyword(s):  

2014 ◽  
Vol 26 (8) ◽  
pp. 652 ◽  
Author(s):  
Airul Ashri ◽  
M Yusof ◽  
M Jamil ◽  
Aminah Abdullah ◽  
S Yusoff ◽  
...  

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