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Superação da dormência de sementes de mucuna-preta pela utilização de "calor seco" Overcoming velvet bean seed dormancy by "dry heat"

By E.B. Wutke, J.A. Maeda and R.M. Pio

Abstract

Avaliou-se a germinação de sementes recém-colhidas de mucuna preta (Mucuna aterrima) após tratamento com "calor seco", em estufa elétrica com ventilação forçada, nas temperaturas de 35, 45 e 55&deg;C, por períodos de exposição correspondentes a 0, 2, 4, 6, 8,16,24, 48, 72 e 96 horas. A temperatura de 55&deg;C foi adequada para a superação da impermeabilidade do tegumento da semente, sendo mais efetivos os períodos de exposição entre 16 e 24 horas.<br>The germination of freshly harvested velvet bean (Mucuna aterrima) seeds was evaluated after "dry heat" treatments under 35, 45 and 55&deg;C, during periods of 0, 2, 4, 6, 8, 16, 24, 48, 72 and 96 hours. The temperature of 55&deg;C was satisfactory to overcome the impermeability of the seed coat, and the exposing periods between 16 and 24 hours were the most effective

Topics: Mucuna preta, Mucuna aterrima, dormência de sementes, calor seco, germinação, velvet bean, Mucuna aterrima, seed dormancy, dry heat, germination, LCC:Agriculture (General), LCC:S1-972, LCC:Agriculture, LCC:S, DOAJ:Agriculture (General), DOAJ:Agriculture and Food Sciences
Publisher: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Year: 1995
DOI identifier: 10.1590/S0103-90161995000300013
OAI identifier: oai:doaj.org/article:5df6f73f65094149b41e6fa25a4462cc
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