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      Morphological and anatomical analyses of the seed coats Translated title: Análisis morfológico y anatómico de las cubiertas de semillas de granadilla (Passiflora ligularis Juss.)

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          Abstract

          The study of histology and morphology of seeds of genus Passiflora has been of high utility for the classification of species. In seeds of sweet granadilla, the histological characteristics and methodologies for their study are unknown. This study was aimed to know the tissue and morphological characteristics of the seed coats of seeds of sweet granadilla and to be able to determine its value in the differentiation of accessions. Five accessions collected in producing zones of the Province of Huila, Colombia, were analyzed. In morphological analysis, all accessions presented falsifoveate ornamentation and entire margin. The seeds presented high change in weight and size for every accession; there stood out the seeds of the accession PmN for presenting major size (7.42 mm long), weight (35.62 mg), homogeneity in these variables and a typical orange color. For the histological analysis, a protocol was adapted to realize sections of seed coats in parafin, by means of which one managed to obtain sections (7 µ) that in the optical microscope show clearly three well differentiated layers, belonging, possibly, to exotegmen (internal layer), mesotesta (medium layer) and exotesta (external layer). Every layer presented differences in the form of the cells, color and thickness, between the sections of the basal and medium parts of the seeds, but the differences between the analyzed accessions were not observed. The majority of seeds had a thickness of seed coats that varied among 235 and 475 µ

          Translated abstract

          El estudio de la histología y morfología de las semillas del género Passiflora ha sido de gran utilidad para la clasificación de especies. Sin embargo, las semillas de granadilla no han sido investigadas. Con este estudio se buscó conocer las características tisulares y morfológicas de la cubierta de las semillas de granadilla y así poder determinar su valor en la diferenciación de accesiones. Se analizaron cinco accesiones colectadas en zonas productoras del departamento del Huila (Colombia). En el análisis morfológico, todas las accesiones presentaron ornamentación falsifoveada y borde entero. Las semillas presentaron gran variación en peso y tamaño dentro de cada accesión; se destacaron las semillas de la accesión PmN por presentar mayor tamaño (7,42 mm de longitud), peso (35,62 mg), homogeneidad en estas variables y un color naranja característico. Para el análisis histológico se adaptó un protocolo para realizar cortes de la cubierta de las semillas en parafina, mediante el cual se logró obtener cortes (7 µ) que al microscopio óptico muestran claramente tres capas bien diferenciadas, pertenecientes posiblemente a la exotesta (externa), mesotesta (media) y exotegmen (interna). Cada capa presentó diferencias en la forma de sus células, color y espesor, entre los cortes basales y los cortes medios de las semillas, sin diferencias claras entre las accesiones analizadas. La mayoría de las semillas mostraron un grosor de la cubierta entre 235 µ y 475 µ

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          Most cited references18

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          Seed coats: Structure, development, composition, and biotechnology

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            Revision of Passiflora Subgenus Decaloba Section Pseudodysosmia (Passifloraceae)

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              The seeds of dycotyledons

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                Author and article information

                Journal
                agc
                Agronomía Colombiana
                Agron. colomb.
                Universidad Nacional de Colombia, Facultad de Agronomía (Bogotá, Distrito Capital, Colombia )
                0120-9965
                December 2011
                : 29
                : 3
                : 377-385
                Affiliations
                [02] orgnamejulianentero@gmail.com
                [01] orgnameUniversidad Nacional de Colombia. orgdiv1Faculty of Agronomy
                Article
                S0120-99652011000300006 S0120-9965(11)02900306
                8a63f561-30f0-488f-b907-3d3641b2875f

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 02 November 2011
                : 15 June 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 18, Pages: 9
                Product

                SciELO Colombia

                Categories
                Propagation and cultivation of tissues

                exotegmen,taniferous cells,macrosclereids,exotesta,mesotesta,células taníferas,macroesclereids

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