Use of Silicon in Mitigating Ammonium Toxicity in Maize Plants
Cid Naudi Silva Campos1*, Renato de Mello Prado2, Cassiano Garcia Roque3, Antonio João de Lima Neto4, Luiz Junior Pereira Marques5, Aridênia Peixoto Chaves6, Claudia Amaral Cruz7
1Department of Soils and Fertilizers, Universidade Estadual Paulista/FCAV, Jaboticabal, Brazil.
2Department of Soils and Fertilizers, Universidade Estadual Paulista/FCAV, Jaboticabal, Brazil.
3Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, Brazil.
4Universidade Federal de Viçosa, Viçosa, Brazil.
5Department of Applied Biology and Agriculture, Universidade Estadual Paulista/FCAV, Jaboticabal, Brazil.
6Department of Plant Science, Universidade Federal Rural do Semi-árido, Mossoró, Brazil.
7M.Sc. in Agronomy, Natal, Brazil.
DOI: 10.4236/ajps.2015.611178   PDF   HTML   XML   3,827 Downloads   4,600 Views   Citations

Abstract

Silicon is a beneficial element that can mitigate abiotic stresses, such as ammonium toxicity. The objective herein was to evaluate the effects of silicon (Si) on mitigating toxicity caused by excess ammonium in maize plants grown in nutrient solution. An experiment was conducted with maize plants (cultivar DKB 390 VT Pro II) grown in a greenhouse in pots (8 L) in a hydroponic system. The treatments were arranged in a 2 × 2 factorial, consisting of two ammonium concentrations (30 and 60 mmol·L-1) in the absence and presence of Si (10 mmol·L-1), arranged in a completely randomized design with six repetitions. At 28 days after applying the treatments the dry mass of shoots and roots was evaluated, along with accumulation of silicon and nitrogen in the shoots. The use of silicon resulted in increases in the studied variables, regardless of ammonium concentrations. Silicon reduced the effect of toxicity caused by ammonium excess in maize plants, resulting in greater growth and dry matter accumulation.

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Silva Campos, C. , Mello Prado, R. , Garcia Roque, C. , de Lima Neto, A. , Pereira Marques, L. , Peixoto Chaves, A. and Cruz, C. (2015) Use of Silicon in Mitigating Ammonium Toxicity in Maize Plants. American Journal of Plant Sciences, 6, 1780-1784. doi: 10.4236/ajps.2015.611178.

Conflicts of Interest

The authors declare no conflicts of interest.

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