Influence of scarification processes on imbibition and germination of Senna corymbosa (Lam.) H.S. Irwin & Barneby
Abstract
Senna corymbosa is South Brazil native forest species, of great interesting ornamental and medicinal. Intending to contribute for the know-how on this specie’s germination process, the uptake of water and dormancy degree imposed for the integument was studied. Thus, was evaluated in two assays the imbibition and germination processes in seeds submitted in wet heat for three minutes at ambient (control), 60°C, 70°C, 80°C and 90°C temperatures, and the sulphuric acid (98%) for five, 10, 15 e 25 minutes, and mechanical scarification. Imbibbition and germination restrictions imposed for the integument was evidenced. Wet heat above of the 70°C was noxious in seeds germination. The treatments with sulphuric acid, mechanical scarification and 60°C water, were efficient to surpass the integument dormancy and to elevate the germination above of 90%.
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