US EPA

2673003 

Journal Article 

Germination and vigor of Sapindus saponaria L. seeds submitted pre-germinative treatments, temperatures and substrates 

de Oliveira, LM; Alcantara Bruno, R; Gomes da Silva, K; da Mota Silva, VD; Ferarri, C; da Silva, GZ 

2012 

No 

Ciencia Rural
ISSN: 0103-8478 

42 

4 

638-644 

WOS:000304352200010 

Sapindus saponaria L. is a large tree distributed especially in the Amazon region is of great importance for the reforestation of degraded areas, construction and manufacture toys. The aim of this study was to test pre-germination treatments to overcome dormancy and to evaluate the effect of temperature and substrate on seed germination of S. saponaria. The experiment was conducted in a protected ambient and the Seed Analysis Laboratory (SAL), Universidade Federal da Para ba. Two tests were developed, and tested first in the following treatments: seeds immersion in sulfuric acid (H2SO4) for 0, 15, 30, 45 and 60 minutes, analyzing the variables: emergence and emergence speed index, length and dry mass of seedlings. In the second test, was evaluated the effect of temperatures (25, 20-30, 30 and 35 degrees C) and substrates (sand, vermiculite and coconut dust) on the germination and seed vigor. From the results it appears that the immersion of seeds of S. saponaria in sulfuric acid for 60 minutes is sufficient to overcome dormancy accelerating and standardizing the seedling emergency. The best conditions for testing germination using constant temperature of 30 degrees C or alternating 20-30 degrees C in vermiculite or only 30 degrees C combined with the sand. 

forest species; soap dish; dormancy; waterproof coat