Antinutritional and/or toxic factors in soybean (Glycine max (L) Merril) seeds: Comparison of different cultivars adapted to the southern region of Brazil

Universidade Federal do Ceará, Ceará, Ceará, Brazil
Journal of the Science of Food and Agriculture (Impact Factor: 1.71). 02/2004; 84(3). DOI: 10.1002/jsfa.1628


Soybean (Glycine max (L) Merril) seeds are known to contain different proteins displaying antinutritional and/or toxic effects, such as soybean agglutinin (an N‐acetylgalactosamine‐specific lectin), proteinase inhibitors (Kunitz‐ and Bowman–Birk‐type trypsin and chymotrypsin inhibitors) and urease (seed and tissue isoforms). Two other toxic proteins were previously isolated from soybeans, soyatoxin (21 kDa) and soybean toxin (18.4 kDa), which are immunologically related to canatoxin, a toxic protein from Canavalia ensiformis (jackbean) seeds. In this work we have screened crude extracts from seeds of six different soybean cultivars, which together represent most of the crop harvested in the southern region of Brazil, for the presence of urease, trypsin inhibitory and haemagglutination activities, intraperitoneal toxicity in mice and immunoreactivity against anti‐canatoxin antibodies. Significant differences were found in the contents of proteinase inhibitors, lectin, urease activity and lethality in mice. The relevance of these findings to the agronomic qualities and to the choice of soybean cultivars to be used as food or feed is discussed. Copyright © 2004 Society of Chemical Industry

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    • "Elle ne peut cependant pas être consommée sans traitement préalable, étant donné sa teneur en facteurs anti nutritionnels (FAN) : saponines, tannins, phytates, lipoxygenases , lectines et antiprotéases . . . Ce large arsenal de composés joue un rôle protecteur des réserves de la gaine, mais intervient probablement aussi sur la germination (Becker-Ritt et al., 2004 ; Cabrera-Orozco et al., 2013). Parmi ces FAN, les inhibiteurs de protéases représentent 6 % des réserves protéiques de la graine (Wang et al., 2004). "
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