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Germination and biochemical components of Salvia hispanica L. seeds at different salinity levels and temperatures Agronomy
Paiva, Emanoela Pereira de; Torres, Salvador Barros; Alves, Tatianne Raianne Costa; Sá, Francisco Vanies da Silva; Leite, Moadir de Sousa; Dombroski, Jeferson Luiz Dallabona.
Most plant species are susceptible to the effects of salinity, such as increases in osmotic potentials and deleterious ionic effects, which in turn affect water absorption in plants and, consequently, compromise germination and seedling growth. Hence, this study aimed to evaluate the effects of salinity on the germination, initial growth, and physiological and biochemical components of S. hispanica seedlings at different temperatures. The experimental design was completely randomized, with treatments distributed in a 5 x 4 factorial scheme with five saline concentrations (0.0 (control), 4.5, 9.0, 13.5, and 18.0 dS m-1) four temperature regimes (20, 25, 30, and 20-30°C), and four replicates of 50 seeds per treatment. The experiment evaluated the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lamiaceae; Chia; Salt stress; Thermal stress.; Produção e Beneficiamento de Sementes.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39396
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Lipid peroxidation and antioxidant enzymes of Jatropha curcas L. seeds stored at different maturity stages Agronomy
Silva, Laércio Junio da; Dias, Denise Cunha Fernandes dos Santos; Sekita, Marcelo Coelho; Finger, Fernando Luiz.
 The objective of the present work was to investigate the antioxidant enzyme activities and the occurrence of lipid peroxidation during storage of J. curcas seeds obtained from fruits at different maturity stages. Seeds extracted from fruits collected at three stages of maturity were used, i.e., yellow, brownish-yellow, and brown (dry fruits). The seeds were subsequently stored for 18 months in Kraft paper bags in a laboratory environment. Initially as well as every three months, the seeds were evaluated for germination and electrical conductivity, and the seed embryos were evaluated for lipid peroxidation; protein content; and superoxide dismutase, peroxidase, and ascorbate peroxidase enzyme activity at the same time points. In general, the seeds from the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physic nut; Seed maturation and deterioration; Enzyme activity; Malondialdehyde content.; Produção e Beneficiamento de Sementes.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34978
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Processing and physical and physiological quality of the native forest seeds of Vernonanthura discolor Agronomy
Grzybowski, Camila Ribeiro de Souza; Silva, Rosemeire Carvalho da; Vieira, Elisa Serra Negra; Panobianco, Maristela.
  The objective was to study the processing of Vernonanthura discolor seeds, evaluating their physical and physiological qualities and defining parameters for purity analysis and determine the weight of one thousand seeds. The seeds extracted from the infructescences were processed in a blower, testing combinations of openings of the calibration valve and the side air passage. After processing, the seeds went through water content determination, germination tests, first count of the germination test, purity analysis, weight of one thousand seeds and percentage of full seeds. Compared to the control, seeds processed in a regulated blower with the calibrator valve in position 10 plus three 360° turns of side air passage obtained an approximately three-fold...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vassourão-preto; Post-harvest; Purity analysis; Weight of one thousand seeds; Seeds blower; Germination.; Produção e Beneficiamento de Sementes; Vassourão-preto; Pós-colheita; Análise de pureza; Peso de mil sementes; Produção e Beneficiamento de Sementes.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39574
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