Influência de doses de níquel sobre o crescimento de mudas de aroeira (Myracrodruon urundeuva Fr. All.) em solução nutritiva

• Autor(a) principal: Paiva, Haroldo Nogueira de
• Data de Publicação: 2015
• Outros Autores: Carvalho, Ruy, Silva, Flávio Pereira da, Carvalho, Janice Guedes de, Melloni, Rogério
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://www.cerne.ufla.br/site/index.php/CERNE/article/view/370; http://repositorio.ufla.br/jspui/handle/1/14523
• topic: Native species; Heavy metals - Toxicity; Metais pesados - Toxicidade

Seedlings of Myracrodruon urundeuva were cultivated in Hoagland and Arnon nutrient solution with Ni 2+ levels: 0; 2,5; 5; 10; 15 and 20 mg Ni2+ L-1 for 40 days. Evaluations of the parameters plant height, stem diameter and root, stem and leaves dry matter production showed significant reduction with increase of Ni2+ levels, except for the stem diameter. The treatment with 2,5 mg Ni2+ L-1 reduced 40% of the plant height and 48% of the total dry matter production; the level of 20 mg Ni2+ L-1 caused the death of the plants. The critical level of Ni toxicity was 1,02 mg L-1. It is also described the symptoms of Ni toxicity.