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Germinação de sementes de Platypodium elegans Vog. submetidas a diferentes tratamentos prégerminativos e substratos Germination of Platypodium elegans Vog. seeds submitted to different pregerminative treatments and substrates

By Mauro V. Pacheco, Valderez P. Matos, Mozart D. Barbosa, Rinaldo L. C. Ferreira and Marco A. A. Passos

Abstract

Visando o efeito de tratamentos pré-germinativos (testemunha; imersão em ácido clorídrico por 3 min; cortes longitudinais sem e com embebição em água) e substratos (areia e pó de coco) na germinação de sementes de Platypodium elegans Vog avaliou-se, no presente estudo, a porcentagem total, a primeira contagem e a velocidade de germinação das sementes, o comprimento e a massa seca das plântulas. Não houve diferença significativa para a porcentagem de germinação (x = 51%), mas os cortes longitudinais proporcionaram maior velocidade de germinação (x = 0,95) e maior porcentagem na primeira contagem (x = 42%). O pó de coco e os cortes longitudinais promoveram maiores comprimento (x = 13,5 cm) e acumulação de massa seca (x = 50,0 mg) das plântulas.<br>The aim of this work was to evaluate the influence of germinative pretreatments (control; chloridric acid, for 3 min; longitudinal cuts without and with water soaking) and substrates (sand and coconut fiber) in the germination of Platypodium elegans Vog. seeds. The analyzed characteristics were: percentage of germination, first germination count, germination speed index, length and dry mass gain to seedlings. There was no significant difference for the germination percentage (x = 51%), but the longitudinal cuts promoted higher indices of germination speed (x = 0.95) and first germination count (x = 42%). The coconut fiber and the longitudinal cuts induced greater length (x = 13.5 cm) and dry mass gain (x = 50.0 mg) in the seedlings

Topics: semente florestal, qualidade fisiológica, vigor, forest seed, physiological quality, vigor, Agriculture (General), S1-972, Agriculture, S, DOAJ:Agriculture (General), DOAJ:Agriculture and Food Sciences
Publisher: Universidade Federal de Campina Grande
Year: 2007
DOI identifier: 10.1590/S1415-43662007000500008
OAI identifier: oai:doaj.org/article:487d37a80ebe4d5b820c4cfe1c9e5f0e
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