Chemical and biochemical characterization of soybean produced under drought stress
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| Format: | Artículo científico |
| Langue: | en |
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Sociedade Brasileira de Ciência e Tecnologia de Alimentos
2009
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| _version_ | 1876451905406763008 |
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| author | Daniela BORRMANN |
| author_facet | Daniela BORRMANN |
| contents | Chemical and biochemical characterization of soybean produced under drought stress Daniela BORRMANN Roberto de Moraes JUNQUEIRA Patrícia SINNECKER Maria Salete de Oliveira GOMES Inar Alves CASTRO Ursula Maria Lanfer MARQUEZ Agrociencias storage Glycine max quality of grains climate conditions Brazil is the second soybean (Glycinemax L. Merrill) producer and exporter in the world. In 2005, soybean cultivated in the southeastern region of the country suffered drought stress imposed by adverse high temperatures and low humidity during its reproductive stage. Little information is available regarding the effect of drought stress on the quality of grains. In this study chemical and biochemical characteristics of five soybean samples belonging to three different cultivars grown under drought stress were evaluated. The samples did not meet standards for marketing and contained high amounts of green seeds. Grains were analyzed for appearance, 100 seed weight, humidity, water activity, proteins, lipids, lipoxygenase 1 activity, peroxides, and pigment contents after harvest and after 20 months of storage at room temperature. Acidity was measured also after 30 months of storage. The values of water activity and humidity were 0.6-0.7 and 8.7-11.9%, respectively, and they did not change during storage time, but there was an increase in acidity, which alludes to lipase activity. The activity of lipoxygenase 1 was greatly affected. Immediately after harvest, the green pigments were represented mainly by pheophytin a, followed by pheophytin b, small quantities of chlorophyll b and chlorophyll a, and traces of other chlorophyll derivatives. After 20 months of storage almost all green pigments had disappeared. Drought stress probably enhanced membrane permeability, which led to a lower pH and promoted transformation of chlorophylls to pheophytins. 2009 artículo científico 0101-2061 https://www.redalyc.org/articulo.oa?id=395940093034 en http://www.redalyc.org/revista.oa?id=3959 Ciência e Tecnologia de Alimentos application/pdf Sociedade Brasileira de Ciência e Tecnologia de Alimentos Ciência e Tecnologia de Alimentos (Brasil) Num.3 Vol.29 |
| format | Artículo científico |
| id | redalyc_395940093034 |
| institution | Redalyc |
| language | en |
| publishDate | 2009 |
| publisher | Sociedade Brasileira de Ciência e Tecnologia de Alimentos |
| spellingShingle | Chemical and biochemical characterization of soybean produced under drought stress Daniela BORRMANN Agrociencias storage Glycine max quality of grains climate conditions Chemical and biochemical characterization of soybean produced under drought stress Daniela BORRMANN Roberto de Moraes JUNQUEIRA Patrícia SINNECKER Maria Salete de Oliveira GOMES Inar Alves CASTRO Ursula Maria Lanfer MARQUEZ Agrociencias storage Glycine max quality of grains climate conditions Brazil is the second soybean (Glycinemax L. Merrill) producer and exporter in the world. In 2005, soybean cultivated in the southeastern region of the country suffered drought stress imposed by adverse high temperatures and low humidity during its reproductive stage. Little information is available regarding the effect of drought stress on the quality of grains. In this study chemical and biochemical characteristics of five soybean samples belonging to three different cultivars grown under drought stress were evaluated. The samples did not meet standards for marketing and contained high amounts of green seeds. Grains were analyzed for appearance, 100 seed weight, humidity, water activity, proteins, lipids, lipoxygenase 1 activity, peroxides, and pigment contents after harvest and after 20 months of storage at room temperature. Acidity was measured also after 30 months of storage. The values of water activity and humidity were 0.6-0.7 and 8.7-11.9%, respectively, and they did not change during storage time, but there was an increase in acidity, which alludes to lipase activity. The activity of lipoxygenase 1 was greatly affected. Immediately after harvest, the green pigments were represented mainly by pheophytin a, followed by pheophytin b, small quantities of chlorophyll b and chlorophyll a, and traces of other chlorophyll derivatives. After 20 months of storage almost all green pigments had disappeared. Drought stress probably enhanced membrane permeability, which led to a lower pH and promoted transformation of chlorophylls to pheophytins. 2009 artículo científico 0101-2061 https://www.redalyc.org/articulo.oa?id=395940093034 en http://www.redalyc.org/revista.oa?id=3959 Ciência e Tecnologia de Alimentos application/pdf Sociedade Brasileira de Ciência e Tecnologia de Alimentos Ciência e Tecnologia de Alimentos (Brasil) Num.3 Vol.29 |
| title | Chemical and biochemical characterization of soybean produced under drought stress |
| topic | Agrociencias storage Glycine max quality of grains climate conditions |
| url | https://www.redalyc.org/articulo.oa?id=395940093034 |