Germination of Caesalpinia leiostachya (benth.) ducke seeds classified by size and shape


Autoria(s): Biruel,Rosangela Peres; Paula,Rinaldo Cesar de; Aguiar,Ivor Bergemann de
Data(s)

01/04/2010

Resumo

Caesalpinia leiostachya (Benth.) Ducke (Caesalpiniaceae) is a Brazilian legumenous tree whose seeds present different sizes and shapes, with dormancy imposed by a waterproof coat. In order to improve that quality of lot, seeds were classified by width in sieves of circular meshes (13, 14, 15, 16 and 17) and manually separated by shape in elongate, round and angular. Masses of 1000 seeds were determined and the thickness of each width and shape seedclass was measured, and coat permeability of the seeds classified by the width was investigated. Seeds were scarified in concentrated sulphuric acid and submitted to the germination test. Both final percentage and speed of germination index were evaluated. The classification of the seeds improved the quality of the lot, and the coat permeability was not affected by seed width. Elongated-flat seeds are of low physiological quality and should be discarded. Masses of 1000 seeds, percentage final and speed of germination increased with the width of the seeds. Both elongated and angular seeds had similar germinative behavior, and round seeds are of greater thickness and of superior physiological quality.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-67622010000200001

Idioma(s)

en

Publicador

Sociedade de Investigações Florestais

Fonte

Revista Árvore v.34 n.2 2010

Palavras-Chave #Tree seed #Processing #Physiological quality
Tipo

journal article