ISSN:
1573-9104
Keywords:
winged bean
;
Psophocarpus tetragonolobus
;
storage protein composition
;
amino acid composition
;
anti-nutritional factors
;
proteinase inhibitors
;
hemagglutinins
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract The seeds of 27 varieties ofP. tetragonolobus from six regions of South-East Asia have been examined by polyacrylamide gel electrophoresis. No marked variations in the electrophoretic patterns were found which could be exploited by plant breeders to improve nutritional quality with respect to sulfur containing amino acids. The amino acid compositions of varieties from the different regions showed little variation. Seed extracts of all 27 varieties ofP. tetragonolobus showed trypsin and chymotrypsin inhibitory activities, and hemagglutinating activities. The levels of trypsin inhibitory activities showed some genotypic differences varying from 22.2 to 42.5 mg trypsin inbibited g−1 of seed meal. As a group the varieties from Malaysia showed the lowest levels of trypsin inhibitor. The chymotrypsin inhibitory activity also showed a similar variation (30.1–47.6 mg chymotrypsin inhibited g−1 of seed meal). Seed extracts agglutinated type O+ and B+ human and rabbit erythrocytes with little difference in activity between varieties. Autoclaving winged bean seed meal prior to protein extraction inactivated the anti-nutritional factors and resulted in considerable reduction of protein solubility.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01093735
Permalink
