Morfologia de frutos e sementes e desenvolvimento pós-seminal de Dyckia goehringii Gross & Rauh (Bromeliaceae)
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Data
2009
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Editor
Vera Lúcia Gomes Klein
Resumo
The knowledge on the reproductive structures and seedling morphology of Bromeliaceae helps
understand their propagation strategies better. The aim of this study was to describe the morphology
of fruits and seeds as well as seedling development of Dyckia goehringii Gross & Rauh (Bromeliaceae).
The fruits are loculicidal and polyspermic capsules, whereas the seeds are ellipsoid and covered by
integuments involving an amylaceous endosperm, which contains a small embryo. During the cryptoepigeous
emergence, the cotyledon remains inside the seed with a haustorial function. The seed
germination process, considered as a protrusion of the cotiledonary sheath, took place four or five
days after seeds were sown. Root hairs, primary root, and adventitious roots originated at the base
of the cotiledonary sheath. The first leaf emerged from a cleft of the cotyledonary sheath 7 days after
germination, and the second one emerged 8 days after germination. The results allowed us to understand
the fruit organizational structure, germination process, development of seedlings, and duration of each
stage. This information is important for accomplishing germination tests, grading seedling vigor, and
understanding the species reproductive ecology.
Descrição
v. 6, n.1, p.1-12, 2009.
Palavras-chave
Cerrado, Germinação, Plântula
Citação
DUARTE, Edson Ferreira; CARNEIRO, Iraídes Fernandes; REZENDE, Maria Helena. Morfologia de frutos e sementes e desenvolvimento pós-seminal de Dyckia goehringii Gross & Rauh (Bromeliaceae). Revista de Biologia Neotropical, v. 6, n.1, p. 1-12, 2009. Disponível em: <http://www.revistas.ufg.br/index.php/RBN/article/view/12626/8258>.