title: Increased Levels of Antinutritional and/or Defense Proteins Reduced the Protein Quality of a Disease-Resistant Soybean Cultivar.
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.
authors.affiliation: Department of Biochemistry and Molecular Biology, Federal University of Ceará, Campus do Pici, , Fortaleza 604440-900, CE, Brazil. danisilas@yahoo.com.br.
authors.forename: Daniele O B
authors.initials: DO
authors.lastname: Sousa
authors.affiliation: Department of Biology, Federal University of Ceará, Campus do Pici, Fortaleza 60440-900, CE, Brazil. aurano@ufc.br.
authors.forename: Ana F U
authors.initials: AF
authors.lastname: Carvalho
authors.affiliation: Department of Biochemistry and Molecular Biology, Federal University of Ceará, Campus do Pici, , Fortaleza 604440-900, CE, Brazil. jtaolive@ufc.br.
authors.forename: José Tadeu A
authors.initials: JT
authors.lastname: Oliveira
authors.affiliation: Department of Biochemistry and Molecular Biology, Federal University of Ceará, Campus do Pici, , Fortaleza 604440-900, CE, Brazil. daviffarias@yahoo.com.br.
authors.forename: Davi F
authors.initials: DF
authors.lastname: Farias
authors.affiliation: Department of Finance, Federal University of Ceará, Campus Benfica, 60440-970, Fortaleza 60020-180, CE, Brazil. lume1250@yahoo.com.br.
authors.forename: Ivan
authors.initials: I
authors.lastname: Castelar
authors.affiliation: Department of Biochemistry and Molecular Biology, Federal University of Ceará, Campus do Pici, , Fortaleza 604440-900, CE, Brazil. henriquebio@gmail.com.
authors.forename: Henrique P
authors.initials: HP
authors.lastname: Oliveira
authors.affiliation: Department of Biochemistry and Molecular Biology, Federal University of Ceará, Campus do Pici, , Fortaleza 604440-900, CE, Brazil. imvasco@ufc.br.
authors.forename: Ilka M
authors.initials: IM
authors.lastname: Vasconcelos
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet; D018506:Gene Expression Regulation, Plant / Q000502:physiology; D008297:Male; D009753:Nutritive Value; D051381:Rats; D017208:Rats, Wistar; D030262:Soybean Proteins / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D013025:Glycine max / Q000235:genetics / Q000378:metabolism*; D015430:Weight Gain
chemical_list: D030262:Soybean Proteins
keywords: Seridó-RCH; conventional breeding; nutritional value; plant protein; unintended traits