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Nutrients 2015, 7(7), 6038-6054; doi:10.3390/nu7075269

Increased Levels of Antinutritional and/or Defense Proteins Reduced the Protein Quality of a Disease-Resistant Soybean Cultivar

1
Department of Biochemistry and Molecular Biology, Federal University of Ceará, Campus do Pici, , Fortaleza 604440-900, CE, Brazil
2
Department of Biology, Federal University of Ceará, Campus do Pici, Fortaleza 60440-900, CE, Brazil
3
Department of Finance, Federal University of Ceará, Campus Benfica, 60440-970, Fortaleza 60020-180, CE, Brazil
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 13 May 2015 / Revised: 25 June 2015 / Accepted: 17 July 2015 / Published: 22 July 2015
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Abstract

The biochemical and nutritional attributes of two soybean (Glycine max (L.) Merr.) cultivars, one susceptible (Seridó) and the other resistant (Seridó-RCH) to stem canker, were examined to assess whether the resistance to pathogens was related to levels of antinutritional and/or defense proteins in the plant and subsequently affected the nutritional quality. Lectin, urease, trypsin inhibitor, peroxidase and chitinase activities were higher in the resistant cultivar. Growing rats were fed with isocaloric and isoproteic diets prepared with defatted raw soybean meals. Those on the Seridó-RCH diet showed the worst performance in terms of protein quality indicators. Based on regression analysis, lectin, trypsin inhibitor, peroxidase and chitinase appear to be involved in the resistance trait but also in the poorer nutritional quality of Seridó-RCH. Thus, the development of cultivars for disease resistance may lead to higher concentrations of antinutritional compounds, affecting the quality of soybean seeds. Further research that includes the assessment of more cultivars/genotypes is needed. View Full-Text
Keywords: Seridó-RCH; unintended traits; conventional breeding; nutritional value; plant protein Seridó-RCH; unintended traits; conventional breeding; nutritional value; plant protein
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sousa, D.O.B.; Carvalho, A.F.U.; Oliveira, J.T.A.; Farias, D.F.; Castelar, I.; Oliveira, H.P.; Vasconcelos, I.M. Increased Levels of Antinutritional and/or Defense Proteins Reduced the Protein Quality of a Disease-Resistant Soybean Cultivar. Nutrients 2015, 7, 6038-6054.

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