Nitrogen metabolism in sorghum under salinity and silicon treatments in Brazil
| Autor: | Luma Castro de Souza, Ellen Gleyce da Silva Lima, Silvia Mara Coelho do Nascimento, Andresa Soares da Costa, Risely Ferraz de Almeida, Liliane Corrêa Machado, Glauco André dos Santos Nogueira, Cândido Ferreira de Oliveira Neto, Ana EcÃdia de Araújo Brito, Myriam Galvão Neves |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
biology food and beverages Forage 04 agricultural and veterinary sciences Sorghum biology.organism_classification Nitrate reductase 01 natural sciences Salinity chemistry.chemical_compound Horticulture Nitrate chemistry Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Ammonium Cultivar General Agricultural and Biological Sciences Nitrogen cycle 010606 plant biology & botany |
| Zdroj: | African Journal of Agricultural Research. 11:199-208 |
| ISSN: | 1991-637X |
| Popis: | The objective of the present research was to study nitrogen metabolism in sorghum plants subjected to salt stress and silicon concentration. The experiment was conducted at the Amazon Federal Rural University, Capitao Poco Decentralized Unit for 1 month, in 2013, using the cultivar BR 700 of forage sorghum plants (Sorghum bicolor [Moench.]). The experimental design was completely randomized, in a 5 × 3 factorial arrangement (0, 50, 100, 150 and 200 µM of silicon) and saline concentrations (0, 1.5 and 2.0 M), consisting of 4 replications. Analyses were conducted of amino acids, proteins, free ammonium, nitrate and nitrate reductase. Nitrate content increased in the leaves and root in the treatments 0 and 1.5 µM of Si, but decreased in treatments with the 0.5 and 1.0 µM doses of Si. In leaves and roots, the treatments 1.5 and 2.0 of SC caused reduction and increase, respectively, of ammonium levels. The silicon doses attenuated the negative effects of the treatments on the biochemical compounds caused by higher salt concentrations in sorghum plants. Key words: Abiotic stress, Sorghum bicolor, salinity, silicon, nitrogen metabolism. |
| Databáze: | OpenAIRE |
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