Biomorfometria do fruto, semente, germinação e plântula de Poincianella pyramidalis (Tul.) L. P. Queiroz, comb. Nov. espécie nativa da Caatinga

Abstract

The objective of this study was to characterize morphological and biometric fruit and seeds, as well as description of the development of Poincianella pyramidalis seedlings, native species occurring in different forms of Caatinga. The fruits were collected between the months from August - September in remnants of Caatinga in Castro Alves, Bahia - BR. In the study of fruit characteristics were observed: color, size, texture and pericarp consistency; dehiscence, number of seeds per fruit. The aspects observed for the seeds were: color, dimensions, weight of 1000 seeds, integument texture and consistency, form, border and position of hilum and micropyle, embryo (form, position and type) and endosperm. The characteristics for seedlings were: root, collar, hypocotyls, cotyledons, epicotyl and protophilus. To evaluate whether the seeds of five plants differ in germination percentage and germination speed index, an experiment was set up in completely randomized design, with five treatments (regarding the five matrices) and three replicates. The Catingueira fruit is type of vegetable, polyspermy, dehiscent, dry pericarp woody texture, surface reticulate, pubescent when immature and green and brown at maturity. The surface is also opaque, although a few fruits were presented hairless and looks polished. The form of the fruit is oblaneolad. The seed has ellipsoid form, yellowish brown and smooth surface, polished and hard. The seedling completes its formation for nine days of germination, this type phanecotylar-epigious. It is observed that the five matrices studied occurred significant differences in the means of characteristic evaluated. The tests of germination showed that seed of matrices two, three and five presented superiority in the percentage of germination and germination speed index in relation to other matrices.