Nitrogen metabolism in sorghum under salinity and silicon treatments in Brazil

de Souza, L.S. and da Silva Lima, E.G. and de Almeida, R.F. (2016) Nitrogen metabolism in sorghum under salinity and silicon treatments in Brazil. African Journal of Agricultural Research, 11 (3). pp. 199-208.

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Abstract

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, Capitão Poço 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.

Item Type:	Article
Uncontrolled Keywords:	Abiotic stress, Sorghum bicolor, Salinity, Silicon, Nitrogen metabolism
Author Affiliation:	Departamento de Solos e Adubos, Universidade Estadual Paulista Júlio de Mesquita Filho/UNESP, Brazil
Subjects:	Plant Protection
Divisions:	Sorghum
Depositing User:	Mr B Krishnamurthy
Date Deposited:	06 Dec 2016 07:35
Last Modified:	06 Dec 2016 07:35
Official URL:	http://dx.doi.org/10.5897/AJAR2015.10453
URI:	http://eprints.icrisat.ac.in/id/eprint/14615

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