GERMINATION AND MORPHOLOGICAL OF SEED AND SEEDLING OF Albizia edwallii (Hoehne) Barneby & J. W. Grimes

Authors

DOI:

https://doi.org/10.1590/1983-21252015v28n319rc

Keywords:

Fabaceae. Temperature. Substrate. Biometry.

Abstract

This study aimed to characterize the morphology of seeds and seedlings and evaluate the germination of seeds of Albizia edwallii submitted to different substrates and temperatures. In physical characterization were evaluated thousand seed weight, the number of seeds per kilogram and moisture content. To determine the morphological characteristics, it was evaluated the biometry of 50 seeds, as well as its internal and external characteristics. Germination was conducted at three temperatures (20 ° C, 25 ° C and 30 ° C) and three substrates (sand, vermiculite and blotting paper) with five replications of 40 seeds per treatment, in a factorial 3 x 3 and completely randomized design. The variables were germination percentage, germination rate index, mean germination time, and synchronization index. The thousand seed weight was 47.7 g, while the number of seeds per kilo was 20.964 for the moisture content of 13.1%. The seeds have an elliptical shape, no endosperm and have persistent funiculus. Germination is epigeal, and the seedling is phanerocotylar being fully formed at 15 days. Temperatures of 20 ° C and 25 ° C provide the highest germination rates, 42 and 38%, respectively, and germination speed index (GSI). The use of sand as a substrate provided better germination percentage than the other substrates. Thus, it is recommended to use sand as a substrate and temperatures of 20 ° C and 25 ° C in A. edwalli germination tests.

Author Biographies

  • Manoela Mendes Duarte, Federal University of Paraná
    Engenheira Florestal, Mestranda em Engenharia Florestal - Programa de Pós-Graduação em Engenharia Florestal UFPR
  • Jaçanan Eloísa de Freitas Milani, Federal University of Paraná
    Engenheira Florestal, Doutoranda em Engenharia Florestal - Programa de Pós-Graduação em Engenharia Florestal UFPR
  • Christopher Thomas Blum, Federal University of Paraná
    Engenheiro Florestal, Dr em Engenharia Florestal, Prof. do Programa de Pós-Graduação em Engenharia Florestal UFPR.
  • Antonio Carlos Nogueira, Federal University of Paraná
    Engenheiro Florestal, Dr em Engenharia Florestal, Prof. do Programa de Pós-Graduação em Engenharia Florestal UFPR.

Published

31-08-2015

Issue

Section

Forest Science