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Storage of Tabebuia caraiba (Mart.) Bureau seeds in different packaging and temperatures

Tabebuia caraiba (Mart.) Bureau, commonly known as Silver Trumpet Tree is a forestal species, belonging to Bignoniaceae family, which can be utilized as medicinal plant or in landscaping of urban and rural areas; besides producing large mechanical resistance wood. Despite its wide use and ecological...

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Bibliographic Details
Published in:Revista brasileira de sementes 2012, Vol.34 (3), p.433-440
Main Authors: Guedes, Roberta Sales, Alves, Edna Ursulino, Melo, Paulo Alexandre Fernandes Rodrigues de, Moura, Sueli da Silva Santos, Silva, Rosemere dos Santos da
Format: Article
Language:English
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Summary:Tabebuia caraiba (Mart.) Bureau, commonly known as Silver Trumpet Tree is a forestal species, belonging to Bignoniaceae family, which can be utilized as medicinal plant or in landscaping of urban and rural areas; besides producing large mechanical resistance wood. Despite its wide use and ecological importance, basic studies on storages of their seeds are scarce. This way, the objective of this study was to determine the most adequate packaging and the best temperatures, for storing seeds of T. caraiba. For this, seeds were stored in two types of packaging: Kraft paper bags and transparent polyethylene bags; which were then stored during 150 days under three different environments: laboratory normal environment (25±2 °C); cold chamber (8±2 °C); and refrigerator (6±2 °C). After periods of 0, 30, 60, 90, 120, and 150 days, seed moisture content, percentage of emergence, emergence speed index, and seedling length were evaluated. Seeds of T. caraiba kept in packaging of paper and polyethylene bags and stored at laboratory environmental condition, have lost more quickly their vigor along the storage period. For storage, it is recommended the maintenance of T. caraiba seeds in polyethylene bags into cold chamber; and/or polyethylene bags or Kraft paper bags into refrigerator. Tabebuia caraiba (Mart.) Bureau, conhecida popularmente por craibeira, pertencente à família Bignoniaceae é uma espécie florestal utilizada na medicina popular e na arborização urbana e rural; além de produzir madeira de alta resistência mecânica. Apesar de seu uso e importância ecológica, os estudos básicos sobre o armazenamento de suas sementes são escassos. Desta forma, o objetivo neste estudo foi determinar as embalagens mais adequadas e as melhores temperaturas, para o armazenamento de sementes de T. caraiba. Para tanto, as sementes foram acondicionadas em dois tipos de embalagens: sacos de papel Kraft; e sacos de polietileno transparente; e armazenadas por 150 dias, em três ambientes: natural de laboratório (25±2 °C), câmara fria (8±2 °C) e geladeira (6±2 °C). Após períodos de 0, 30, 60, 90, 120 e 150 dias foram determinados: grau de umidade; porcentagem de emergência; índice de velocidade de emergência e comprimento de plântulas. As sementes de T. caraiba acondicionadas nas embalagens de papel e polietileno e armazenadas no ambiente de laboratório perderam mais rapidamente o vigor ao longo do armazenamento. Para o armazenamento recomenda-se a manutenção das sementes em sacos de polie
ISSN:0101-3122
0101-3122
DOI:10.1590/S0101-31222012000300010