Potencial fisiológico de sementes de mutambo (Guazuma ulmifolia Lam.) em diferentes procedências

Abstract

The work had as objective to evaluate the provenances of seeds to verify the efficiency of different tests of vigor for identification of the physiological potential in four lots of seeds of mutamba (Guazuma ulmifolia Lam.). The study it was developed in the Laboratory of Analysis of Seeds and in the Experimental Fishery of Ornamental and Forest Plants - UNESP, Jaboticabal, SP. Four lots of seeds proceeding from three São Paulo localities had been used: lots I and II, collected in the city of Jaboticabal in 2000 and 2001, respectively, lot III: collected in Saint Rita do Passo Quatro and it crowds IV: collected in Luiz Antonio, both in 2001. The seeds used in all the tests had been escarificadas with sulfuric acid during 50 minutes, and washed in current water during 15 minutes. They had been evaluated: seed moisture, test of germination, test of first counting, index of germination speed, emergency in fishery, index of emergency speed. The seeds moisture of the seeds in the different lots had presented small variations (9,2 10.0%). Statistical differences for the germination percentage, emergency in fishery and index of speed of emergency in the different studied lots had not been verified. The tests of first counting and index of germination speed had revealed adequate for evaluation of the physiological potential of the lots. The seeds of lot III proceeding from the city of Santa Rita do Passo Quatro, had presented superior physiological potential to the too much studied lots.