Teste de classificação de Plântulas normais fortes para as espécies Enterolobium contortisiliquum, Pityrocarpa moniliformis e Poincianella pyramidalis

Abstract

The seeds vigor tests that complement the information obtained by the germination test are used to evaluate the vigor in seeds, are classified as physical, physiological, biochemical and resistance to stress. Inserted in the physiological tests, the seedling vigor classification test for the evaluation of seed lots has been little used, mainly with native forest species. Thus, the objective of this work was to adapt the methodology of the test of strong normal seedlings for three forest species native to Caatinga (Enterolobium contortisiliquum, Pityrocarpa moniliformis and Poincianella pyramidalis). The study was divided in three stages: morphological characterization of the seedlings, carried out from germination test; physiological characterization of the seed lots by the vigor test and seedling vigor classification, correlating the results obtained in the physiological tests with the percentage of normal "strong" seedlings obtained in each seed lot. The results showed that there was a difference in the physiological quality of the seeds of the lots of E. contortisiliquum, P. moniliformis and P. pyramidalis. The specific parameters adopted in the morphological characterization of strong normal seedlings are efficient in the classification of seed vigor for the species under study.