Seeds germination of two caatinga species under drought and salinity

• Autor(a) principal: Santos, Cibele Alves dos
• Data de Publicação: 2016
• Outros Autores: Silva, Natália Vaz da, Walter, Letícia Siqueira, Silva, Elaine Cristina Alves da, Nogueira, Rejane Jurema Mansur Custódio
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Florestal Brasileira (Online)
• Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1017
• topic: Poincianella pyramidalis; Anadenanthera colubrina; Polietilenoglicol; Cloreto de sódio; Cloreto de cálcio; Poincianella pyramidalis; Anadenanthera colubrine; Plant development

Plants that need to grow in soils of arid and semi-arid regions can find saline or low water availability soils. The present study aimed at to evaluate germination on roll paper substrate of catingueira and angico seeds under salt and water stress conditions, induced by calcium and sodium chlorides and water stress induced by PEG 6000. Treatments were: 0 MPa (control - distilled water); -0.4 MPa (NaCl, CaCl2 and PEG), -0.8 MPa (NaCl, CaCl2 and PEG) and -1.2 (NaCl, CaCl2 and PEG). It was evaluate percentage of germination, speed germination index and average germination time. There was no seeds germination of both species under the more negative osmotic potential (-1.2 MPa) of CaCl2 and PEG 6000. Seeds germination of both species were more affected by CaCl2, with no germination over - 0.8 MPa. Catingueira seeds showed higher tolerance to salt stress, while angico seeds better withstood water stress condition.