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Evaluation of the Nutritive Quality of Grain Legumes by an Analysis for Total Sulfur 1
Author(s) -
Porter W. M.,
Maner J. H.,
Axtell J. D.,
Keim W. F.
Publication year - 1974
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1974.0011183x001400050013x
Subject(s) - vigna , phaseolus , cystine , methionine , radiata , biology , sulfur , protein quality , agronomy , legume , gram , zoology , food science , cysteine , amino acid , biochemistry , chemistry , enzyme , organic chemistry , genetics , bacteria
The protein efficiency ratio (PER) was determined for five varieties of dry beans ( Phaseolus vulgaris L.), one variety of mung bean [ Vigna radiata (L.) Wilczek], and one variety of cowpea [ Vigna unguiculata (L.) Walp.], chosen because they showed variability in total sulfur as percent of crude protein and were available in sufficient quantities for rat feeding trials. The correlation of total sulfur as a percent of crude protein with the sum of methionine and cystine as a percent of protein in the seven varieties was highly significant (r = 0.93). Significant correlations of PER on each of the above two variables were obtained, whereas correlations of PER on methionine or cystine alone were not significant. These data indicate the potential for using analysis of total sulfur as a screening technique for nutritive quality in grain legumes.