Influence of priming on Eucalyptus spp seeds' tolerance to salt stress

• Autor(a) principal: José, Anderson Cleiton
• Data de Publicação: 2016
• Outros Autores: Silva, Natália Cristina Nogueira, Faria, José Marcio Rocha, Pereira, Wilson Vicente Souza
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/29757
• topic: Eucalyptus urophylla; E. grandis x E. urophylla; Abiotic stress; Physiological conditioning; Estresse abiótico; Condicionamento fisiológico

The objective of this experiment was to evaluate the effect of priming on the germination of Eucalyptus urophylla and of hybrid E. urophylla × E. grandis seeds under salt stress. Two osmotic potentials (-1.0 and -1.5 MPa) were tested, using PEG 6000 for 1 and 3 days. After priming, seeds were germinated under salt stress in a NaCl solution at 0.0 (control), -0.5, -0.75 and -1.0 MPa potentials, at 25 °C. Seed germination and germination speed index decreased as the water potential of the germination medium decreased. However, E. urophylla was more tolerant to salt stress; it showed a higher germination percentage under all tested potentials, when compared to the hybrid. The osmotic conditioning at -1.0 MPa for three days was more effective when E. urophylla x E. grandis was germinated in a salt solution at -1.0 MPa, indicating that this treatment was more effective in inducing tolerance to salt stress.