Polyphenols, Phytate, Cyanogenic Glycosides, and Trypsin Inhibitor Activity of Several Philippine Indigenous Food Legumes
✍ Scribed by Antonio C. Laurena; Ma.Jamela R. Revilleza; Evelyn Mae T. Mendoza
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 445 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0889-1575
No coin nor oath required. For personal study only.
✦ Synopsis
The levels of antinutritional and toxic factors were determined in several Philippine indigenous legumes, namely, hyacinth bean (Dolichos lablab L.) lima bean (Phaseolus hunatus L.), sabawel or velvet bean (Mucuna curanii), sam-samping (Clitoria ternatea), rice bean (Vigna umbellata), jackbean (Canavalia ensiformis), and swordbean (Canavalia gladiata). Low levels of condensed tannins ( (0-2.48 \mathrm{mg}) catechin (/ \mathrm{g}) ) and protein-precipitable polyphenols ( (0.16-0.77 \mathrm{mg}) tannic acid / gram) were observed in raw mature seeds of the six legumes analyzed in this pretiminary study. Seeds of hyacinth bean, jackbean, and lima bean had relatively high levels of phytate phosphorus ranging from 6.6 to (11.6 \mathrm{mg}) of phytate (\mathrm{P} / \mathrm{g}) of sample. Lower values (<5) were obtained for sabawel and swordbean as well as some varieties of mungbean used as controls. The indigenous legumes analyzed had low levels of less than (50 \mu \mathrm{g} / \mathrm{g}) of cyanide in the seeds, immature and mature leaves, and immature pods using two methods of analysis. Among the legumes investigated, hyacinth bean had the highest trypsin inhibitor activity ranging from 14 to 27 units/mg sample for four accessions. Accession 6-1 of sabawel had 20 units/mg. Sword bean and jack bean had low levels of 1 to 5 units/mg except for one jack bean accession (A-1) which had 9 units (/ \mathrm{mg}). Rice bean also had low levels of trypsin inhibitor activity, 5-7 units/mg. 1994 Academic Press, Inc.