Abstract
Caesalpinia ferrea Mart. Ex Tul. is a tropical arboreal species used in naval and civil construction, and in the recovery of degraded areas. The substrate used and temperature can interfere directly in the germination of this species. This work aimed to evaluate the influence of different substrates and temperature regimes on the seed germination potential and initial growth of C. ferrea seedlings. The experiment was conducted at the Plant Propagation Laboratory of the Federal University of Alagoas, Brazil. A completely randomized design was used in a 5 × 4 factorial scheme with five substrates (paper roll, paper, sand, and vermiculite) and four temperatures (20, 25, 30 and 35°C). The evaluated characteristics were first count of germination, germination, germination speed index, dry mass, and seedling length. Results showed that C. ferrea seeds could germinate under different temperatures and substrate conditions. The sand substrate and the temperature of 30°C are excellent for evaluating the physiological quality of the seeds. Key words: Physiological potential, substrate, temperature.
Highlights
The germination process involves a series of metabolic activities, in which a sequence of chemical reactions occurs with their own temperature requirements because they depend on specific enzymatic activities (Marcos Filho, 2015)
This work aimed to evaluate the influence of temperature and substrates on the physiological potential of C. ferrea seeds to determine the procedures for the germination and vigor tests of these seeds
For the results on vigor in the first germination count (Table 1), the paper roll substrate exhibited the highest values at 25°C
Summary
This work aimed to evaluate the influence of temperature and substrates on the physiological potential of C. ferrea seeds to determine the procedures for the germination and vigor tests of these seeds. For the results on vigor in the first germination count (Table 1), the paper roll substrate exhibited the highest values at 25°C. The seeds placed to germinate on the roll paper towel substrate at 25, 30 and 35°C presented high germination percentages, but they were not statistically different from those in the substrates between paper at 30°C, paper at 25°C, sand at 30°C, and vermiculite at 20, 25, and 30°C.
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