Morphology of fruit and seed and germination on Poincianella pyramidalis L. P. Queiroz, comb. Nov

• Published in: Ciência florestal p. 375
• Main Authors: Mendonca, Andrea Vita Reis, de Freitas, Teresa Aparecida Soares, Souza, Leonardo Silva, Fonseca, Mariana Duarte Silva, Souza, Josival Santos
• Format: Journal Article
• Language: Portuguese; Spanish
• Published: Universidade Federal de Santa Maria 01-04-2016
• Subjects: Brasil
• ISSN: 1980-5098
• DOI: 10.5902/1980509822738

The objective of this study was to describe the morphological characters of fruits, seeds and seedlings, characterize the germination process and verify that the seed position in the fruit interferes with the seed germination of Poincianella pyramidalis. The fruits were collected from five trees in the Castro Alves, Bahia--Brazil in the area near the remnants of Caatinga sensu stricto and Deciduous Forest. The fruit of Poincianella pyramidalis is a type of legume, polyspermic, dehiscent, measuring on average 9.4 ± 0.08 cm in length and can contain up to 8 seeds per fruit, being the average number of seeds, apparently viable fruits per 100 ± 280 29.8. The seed is ellipsoid, yellowish brown color and smooth, polished and hard, being provided testa and internal tegument, with a length of 1.25 [+ or -] 0.004 cm. The embryo is axis, invaginated and straight and there was no presence of endosperm. The weight of 1000 seeds was 106.8 ± 12.4 g. Germination is phanecotylar-epigious began the third day after sowing and the complete formation of the seedling was observed on the ninth day. Seed production of Poincianella pyramidalis in the proximal position is lower compared to other positions. Seed germination is influenced by seed position in the fruit, seeds present in the distal lower seed germination of other positions. Keywords: Caesalpinia pyramidalis; catinga-de-porco; fruit position on seed. O objetivo deste trabalho foi descrever os caracteres morfologicos dos frutos, sementes e plantulas, caracterizar o processo de germinacao e verificar se a posicao da semente no fruto interfere na germinacao de sementes de Poincianella pyramidalis. Os frutos foram coletados de cinco arvores-matrizes em propriedade rural situada no municipio de Castro Alves--BA--Brasil em area proxima a remanescentes de Caatinga sensu stricto e Floresta Estacional. O fruto de Poincianella pyramidalis e do tipo legume, polispermico, deiscente, medindo, em media, 9,4 ± 0,08 cm de comprimento, podendo conter ate 8 sementes por fruto, sendo o numero medio de sementes, aparentemente viaveis, por 100 frutos de 280 ± 29,8. A semente e elipsoide de cor castanho-amarelada e superficie lisa, polida e dura, sendo provida de testa e tegma, com comprimento de 1,25 ± 0,004 cm. O embriao e axial, invaginado e reto e nao foi verificada presenca de endosperma. O peso de 1000 sementes foi de 106,8 ± 12,4 g. A germinacao e epigea fanerocotiledonar, teve inicio no terceiro dia apos a semeadura e a formacao completa da plantula foi verificada no nono dia. A producao de sementes de Poincianella pyramidalis na posicao proximal e inferior em relacao as demais posicoes. O percentual de germinacao e influenciado pela posicao da semente no fruto, sementes na posicao distal apresentam germinacao inferior as sementes das demais posicoes. Palavras-chave: Caesalpiniapyramidalis; catinga-de-porco; posicao semente no fruto.