Morfologia De Fruto, Semente E Plântula, E Germinação De Sementes De Myrceugenia Euosma (O. Berg) D. Legrand (Myrtaceae)

Abstract

Myrceugenia euosma is a tree or shruby species that occurs in South America in two major centers: Chile and south of Brazil. The objective of this work was to study the morphology of the fruit, seed and seedling and the seed germination of this species. Fruit, seed and seedling were illustrated and described. The influence of three substrates (paper towels, paper roll and sand), temperatures (20 °C, 25 °C and 30 °C) and conditions of light (presence and absence) over the seed germination were evaluated. The fruit of M. euosma is a berry, containing 2 to 13 seeds. The seed has membranaceous tegument, small amount of mucilaginous endosperm, evident only in germination, and embryo typical of the subtribe Myrciinae. The seedling is epigea, phanerocotylar, with paracotyledons and eophylls simple, opposites. Germination started three to five days after the test installation. Almost all treatments resulted in relatively high germination percentage (≈72%), except in paper roll at 30°C (43%). The species germinates in the absence of light. The results indicate that M. euosma has few reproductive restrictions with regard to germination.