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Issue: Vol. 682 No. 3: 23 Jan. 2025
Type: Article
Published: 2025-01-23
DOI: 10.11646/phytotaxa.682.3.2
Page range: 214-226
Abstract views: 32
PDF downloaded: 3

Seed morphology of five Aeschynomene (Fabaceae) species from Pantanal

Universidade Federal do Mato Grosso do Sul, Programa de Pós-Graduação em Biologia Vegetal, Instituto de Biologia, Cidade Universitária S/N, Caixa Postal 549, Campo Grande, Mato Grosso do Sul, Brazil
Universidade Federal de Rondonópolis, Instituto de Ciências Exatas e Naturais, Cidade Universitária, Avenida dos Estudantes, 5055 CEP 78736-900, Rondonópolis, Mato Grosso, Brazil
Universidade Federal do Mato Grosso do Sul, Programa de Pós-Graduação em Biologia Vegetal, Instituto de Biologia, Cidade Universitária S/N, Caixa Postal 549, Campo Grande, Mato Grosso do Sul, Brazil
Universidade Federal do Mato Grosso do Sul, Programa de Pós-Graduação em Biologia Vegetal, Instituto de Biologia, Cidade Universitária S/N, Caixa Postal 549, Campo Grande, Mato Grosso do Sul, Brazil
Leguminosae scanning electron microscope Papilionoideae wetlands Eudicots

Abstract

Seed shape, dimensions, surface texture, sculpture, hilum shape, and position were recorded for five Aeschynomene L. species (Fabaceae): A. denticulata, A. fluminensis, A. histrix, A. rudis, and A. sensitiva from Pantanal, Brazil, using a scanning electron microscope. The five species shared similar seed characteristics such as shape, color, surface, apex and base, face and side, hilar fissure, hilar sculpture and color, aril sculpture and color, micropylar pore position, and testa sculpture. Seed species differed in measurements (seed length and width, hilum length and width, and aril elevation). The hilum exhibited the position, shape, microsculpture, periclinal wall, and secondary sculpture of the testa, which are typical of some species. Two patterns were recognized based on the hilum shape, hilar area, and five hilum microsculpture surface patterns. Four patterns were recognized based on the testa periclinal wall, and three patterns were recognized based on the testa secondary sculpture. The results proved the potential taxonomic value of the recorded characteristics, as indicated by the richness of variation recorded in a limited sample of Aeschynomene species in the Pantanal wetland.

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