Caracterização da germinação e morfologia de frutos, sementes e plântulas de Dalbergia cearensis Ducke (pau-violeta) – Fabaceae

Abstract

– (Morphological characterization of fruits, seeds, seedlings and germination of Dalbergia cearensis Ducke – Fabaceae). This study describes and illustrates the morphological characteristics of fruits, seeds, early stages of germination and seedlings of Dalbergia cearensis for the fi rst 28 days after sowing. The fruit, which is supported by a 3-5 mm stipe, is a dry, indehiscent samara, oblong with acute base and apex, 1-seeded, fl at, with a central seminiferous nucleus, thin pericarp, aliform, slightly reticulate. The seed is exalbuminous, oblong, fl at, reniform, with a smooth seed coat; it is a brownish color when ripe. Germination is epigeous, with the tegument adhering to the cotyledons in the initial seedling growth phase; it begins on the third day after sowing in laboratory conditions. Mean germination of 70% was observed at 14 days. On day 28 after sowing, seedlings had an axial root system, a pivotal main root, 231.54 mm long, cylindrical, fl exible, yellowish-white. The seedlings are classifi ed as phanero-epigeal-reserve (PER) type.