Desenvolvimento de tecnologia de avaliação de vigor e para o armazenamento de sementes de macaúba (Acrocomia aculeata (Jacq.) Lodd. ex. Mart)

• Ano de defesa: 2013
• Autor(a) principal: Souza, Patrícia Pereira de
• Orientador(a): Motoike, Sérgio Yoshimitsu
• Banca de defesa: Queiroz, Domingos Sávio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Palmeira; Viabilidade de sementes; Conservação
• Palavras-chave em Inglês: Palm; Seed viability; Conservation
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/4621

Macaw palm, Acrocomia aculeatea, native palm tree from the cerrado, savannas and open forest in America tropical, is found widely distribuited in the states of Mato Grosso do Sul, Rio de Janeiro, São Paulo, Pará and Minas Gerais. Among the oleaginous species, macaw palm stands for being a palm tree highly productive and native from semi-arid regions. This way, in the first chapter the objective was to adequate methodologies to evaluate the vigor and viability of the macaw palm seeds. The germination tests, germination speed index (GSI), electrical conductivity, accelerate aging and tetrazolium were analyzed. In this experiment four seed lots were used, being Lot 1 (Montes Claros) that showed the best results for all of the tests applied. Among the applied tests the GSI and the electrical conductivity were efficient in the physiological quality evaluation of the seeds. The accelerate aging and the tetrazolium tests require more studies to adequate and posterior utilization to evaluate the macaw palm seeds. The second chapter had as an objective to develop a method for conditioning macaw palm seeds guarantying the conservation of the physiological quality. Two assays were performed: first assay, the seeds were stored under three moisture ranges 4,0 ≤ 6,0%; 6,0 ≤ 8,0% and 8,0 ≤ 10,0% in impermeable containers under environment temperature and 10oC. At 0, 4, 8 and 12 months of storing the seeds were submitted to following evaluations: water content and germination test. Second assay, the seeds were stored in three different kinds of containers: a) permeable (Kraft type paper), b) semi-permeable (rigid polyethylene) and c) impermeable (Flexible sheet of aluminium). Three storing conditions were compared: a) environment temperature in laboratory conditions (condition 1); b) 45% of UR and temperature of 15oC (condition 2); and c) 55% of UR and temperature of 20oC (condition 3). Water content, germination rate and germination speed index (GSI) were evaluated; at 0, 4, 8 and 12 months of storing. In the first assay the best germination results were obtained with the moisture range 6,0 ≤ 8,0%. However, the seeds stored at temperature 10oC, independently from the humidity content didn t survive when they were evaluated at 4 months of storing. In the second assay, the stored seeds with 5,86% water content and the storing environment 15oC/45%UR and 20oC/55%UR independently from the type of container showed the best results.