Testes de tetrazólio, envelhecimento acelerado e osmocondicionamento aplicados em sementes de Anadenanthera peregrina (L.) SPEG

• Autor(a) principal: Pinho, Daniel Santos
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3222
• topic: Tetrazólio; Envelhecimento acelerado; Osmocondicionamento; Anadenanthera peregrina; Tetrazolium test; Accelerated aging; Osmopriming; Anadenanthera peregrina; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA

The aim of this thesis was to evaluate viability and vigor of Anadenanthera peregrina seeds during the storage being used itself of different methodologies. Seeds of A. peregrina harvested in the region of Viçosa - MG, in September of 2005 had been used, stored in the Laboratório de Análise de Sementes Florestais (LASF) of the Universidade Federal de Viçosa (UFV) in cardboard pipes, in cold chamber, approximately, 5ºC and 60% of relative humidity until the date of the beginning of the works. The seed moisture content was determined in an oven at 105 ± 3ºC for 24 hs with four repetitions of 25 seeds. The seeds were submitted to the following tests: tetrazolium test, test of germination standard, index of germination speed, osmopriming, electric conductivity, seedling evaluation and accelerated aging test. A. peregrina seeds had kept constant the viable seeds for all storage period, as much in 5ºC how much 20ºC. The tetrazolium test if showed to substitute to the test of germination in all analyses. The viability and the vigor of the A. peregrina seeds had been affected by the increase time of permanence in the aging chamber, being that the period of 96 hours of accelerated aging and the temperatures of 50 and 60º C had caused the total loss of the viability and the vigor of the seeds. The osmopriming did not show efficient in the recovery of the viability and vigor of the seeds.