Resposta germinativa de sementes de Libidibia ferrea Martius submetidas a fatores abióticos

Data
2015-03-27
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Universidade Federal Rural do Semi-Árido

Resumo

The L. ferrea is a plant in the Fabaceae family-Caesalpinoidae, commonly known jucá or ironwood is commonly found in the Caatinga of northeastern Brazil. The study investigated the germination response L. ferrea seeds in function of temperature and variation of osmotic potential.The research was conducted in the Biotechnology Laboratory at the Universidade Federal do Semi-Árido (UFERSA), Mossoró-RN. The work was divided into two experiments. In the first experiment was the curve of absorption of the seeds in different EC (Electrical Conductivity) 0 dSm-1 (control), 5dSm-1, 10 dSm-1, 15 dSm-1, 20 dSm-1 at constant temperatures of 15, 22, 27, 32 and 40°C. In the second experiment we observed the effects of osmotic potential (0, 5, 10, 15 and 20 dSm-1) and constant temperatures (15, 22, 27, 32, and 40°C), seed germination. The conclusion of this study that the EC influence the absorption of water by jucá seeds. At higher temperatures the absorption is faster, but with increased absorption EC decreases. The best germination was found at 27°C. The EC influenced seed germination, IVG and length of jucá seedlings as they increased the concentration of salts


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Citação
DANTAS, Joelma Medeiros. Germinal response Libidibia seeds ferrea Martius subjected to abiotic factors. 2015. 56 f. Dissertação (Mestrado em Ecologia e conservação do Semiárido) - Universidade Federal Rural do Semi-Árido, Mossoró, 2015.