摘要：Cochlospermum regium (Schrank) Pilger is a common species in Cerrado areas with anthropic alteration. The study of the germination behavior of a species may indicate if it is a pioneer and the best conditions to carry out germination tests in the laboratory. This work aimed at investigating the germination behavior of C. regium under several light and temperature conditions. The light effect was evaluated using a completely randomized design in a 2x4 factorial scheme, with two pre-treatments, four light conditions, and four replicates of 50 seeds. The pre-germination treatments consisted of immersion in sulfuric acid and immersion in water, and the light conditions were darkness, light, far red, and red. In the experiment to determine the temperature effect, we used the same design and pre-treatments and four temperatures: 15ºC, 20ºC, 25ºC, and 30ºC. C. regium seeds scarified with sulfuric acid germinated under all light conditions and therefore they were considered neutral photoblastic. The laboratory tests of germination must be performed during a period of 15 days at 25ºC with scarified seeds. In the ecological succession, C. regium was classified as a pioneer species.
Loading...
