Germinação de Ruprechtia laxiflora Meisn

Abstract

The objective of this work was to determine the most suitable temperatures for the germination of Ruprechtia laxiflora Meisn, a native tree species belonging to the family Polygonaceae. The experiment was conducted at the Federal University of the Recôncavo da Bahia, in Cruz das Almas, Bahia, Brazil. The seeds were obtained from fruits harvested from ten matrices, in the Environmental Protection Area of the “Lago de Pedra do Cavalo”, in the city of Feira de Santana, Bahia, Brazil. Biometric characteristics were analyzed and germination tests were performed under controlled temperature conditions. Temperature effect analysis was performed at six constant (15, 25, 30 and 35 ° C) and alternating temperature ranges (25-30 and 15-30 ° C). Seeds and seedlings were evaluated daily until germination of the seed was stabilized. The results indicated that there was variability among the matrices, regarding the biometric characteristics of R. laxiflora seeds and different responses regarding vigor, physiological quality and germinative process, the matrix 2 apresentou or melhor desempenho. The constant temperatures of 25 °, 30 ° and alternating 25-30 ° and 15-30 ° C are suitable for testing germinação com a espécie. The temperatures of 15 ° and 35 ° C are not indicated for the germination of R. laxiflora.