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Open AccessArticle

Effect of Water Deficit-Induced at Vegetative and Reproductive Stages on Protein and Oil Content in Soybean Grains

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Embrapa Soja, Rodovia Carlos João Strass, Distrito de Warta, Londrina, PR 86001-970, Brazil
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Coordination for the Improvement of Higher Education Personnel (CAPES)/Embrapa Soja, Rodovia Carlos João Strass, Distrito de Warta, Londrina, PR 86001-970, Brazil
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Undergraduate student, Course of Agronomy—Philadelphia University Center, Av. Juscelino Kubitschek, 1626, Londrina, PR 86020-000, Brazil
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Author to whom correspondence should be addressed.
Agronomy 2018, 8(1), 3; https://doi.org/10.3390/agronomy8010003
Received: 13 October 2017 / Revised: 12 December 2017 / Accepted: 14 December 2017 / Published: 28 December 2017
Soybean is one of the most common grain crops worldwide, representing an important protein and oil source. Although genetic variability in the chemical composition of grains is seen in soybean, the mean levels of proteins have remained stagnant or, in some cases, have decreased over time, arousing concern in the agricultural industry. Furthermore, environmental conditions influence the chemical composition of grains. Thus, the present study evaluated the effect of water deficit (WD) induced at the vegetative period (vegetative stress (VS)) and reproductive period (reproductive stress (RS)) on the protein and oil contents of grains in different soybean genotypes. Yield and its components were evaluated to evaluate the interrelation of these traits. The experiment was completed over three crop seasons under field conditions in Londrina, Paraná (PR), Brazil. WD was induced using rainout shelters and then stress treatments with irrigated and non-irrigated conditions were compared. WD negatively affected yield and its components. All evaluated genotypes showed similar responses for oil and protein contents under different water conditions. Higher protein content and lower oil content were observed in grains under RS. Such a relationship was not equally established under VS. Additionally, negative relationships between protein and oil content and between protein content and yield were confirmed. View Full-Text
Keywords: Glycine max L. Merrill; drought; grain quality Glycine max L. Merrill; drought; grain quality
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Mertz-Henning, L.M.; Ferreira, L.C.; Henning, F.A.; Mandarino, J.M.G.; Santos, E.D.; Oliveira, M.C.N.D.; Nepomuceno, A.L.; Farias, J.R.B.; Neumaier, N. Effect of Water Deficit-Induced at Vegetative and Reproductive Stages on Protein and Oil Content in Soybean Grains. Agronomy 2018, 8, 3.

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