Morfometria de frutos, sementes e plântulas, fisiologia de sementes de Ouratea racemiformis Ule (Ochnaceae).

Abstract

Ouratea racemiformis Ule is one of the species that stand out in sandy plain vegetation, as well as having lush inflorescences and attractive to landscaping, has still wide availability of fruits and seeds, thus becoming the object of study of this work, which aims describe the morphology of their fruits, seeds and seedlings, the germination process on different substrates, and observe their viability for use in landscaping. To this end, it carried out the morphological description of fruits, seeds and seedlings, a thousand seed testing, soaking, moisture content, germination and emergence using four substrates (sand spit, black soil, vermiculite and plantmax). The drupes have fibrous core and resembling pyr ene, elliptical, rounded apex. Elliptical seeds with beige or brown striated integument and visible heel, brown, aryl, membranous; abundant endosperm, green cotyledons or wine stain, straight, flat, elliptical, broad-elliptical lightly obovais, hypocotyl-radicle axis short, straight embryo and small plumule. Germination is phanerocotylar epigeous with curved emergency. The sandy substrate showed the best performance, with a rate of 100% of emergency and 91% of germination, increasing the cotyledons and epicotyl development and eophylls. With thesecond best result, plantmax substrate, showed 100% of emergency, as well as the white sandy substrate, however, only 87% of germination, followed by vermiculite, which obtained 96% of emergency and 88.54% germination. And with the slightest effect, the black soil substrate which showed 84% of emergency and of these, 77.38% germination. All substrates are favorable for the germination of O. racemiformis. The high rate of germination with low occurrence of abnormalities, size, leaf density, flowering and fruiting, they provide an indication o f O. racemiformisfor ornamental use in gardens, parks, hedgerows, rural and medians of streets and avenues, voiding the practice of predation landscaping and stimulating the production of seedlings for use in eco-conscio us landscaping.