Ontogenic development of Guazuma ulmifolia (Sterculiaceae) sapplings

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dc.contributor.authorNeto, JCD
dc.contributor.authorde Aguiar, I. B.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:28:38Z
dc.date.available2014-05-20T15:28:38Z
dc.date.issued1999-12-01
dc.description.abstractGuazuma ulmifolia is as popular reforestation tree all over Latin America. It is characteristic of the initial stages of the secondary sucession and presents potential utility in the restoring of degraded areas. There is no information about fruit,seed and seedling morphology, which is of fundamental importance for identification, extraction, management and seed germination as well as for the characterization of post-seminal development and normal seedling pattern. To obtain such information, external fruit, and external and internal seed structures were studied considering shape, size, micropile and embryo localization; and tegumentar structures. All stages of this work were conduced in the Universidade Estadual Paulista (UNESP), Campus of Jaboticabal city. The fruits were collected in a mixed plantation in Jaboticabal city, State of São Paulo, Brazil. For the bio metric study eight repetitions of ten fruits and eight repetitions of 100 seeds were utilized. For seed internal traits study, 50 seeds were drenched in a distiled water, cut, and observed with a scanning electron microscope and a stereomicroscope, For post-seminal study ten repetitions of seven seeds were scarificated chemically with sulphuric acid during 50 min, and placed to germinate ina culture medium, at 30 degrees C, and eight hours of photoperiod. We found elipsoid, woody, indehiscent, pentacarpelar fruits, with a mean lenght of 22.61 mm (diameter 24.88 mm) and 64.0 seeds per fruit. Seed shape varies, mean length is 3.07 mm (width of 2.36 mm). The seed is bitegumented, tegmic, with a continuous, axial and curved embryo. The germination is epigeal and the seedlings are fanerocotiledoneus. Drawings of all stages are included.en
dc.description.affiliationUniv Estadual Paulista, Dept Hort, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Hort, São Paulo, Brazil
dc.format.extent785-790
dc.identifier.citationRevista de Biologia Tropical. San Jose: Revista de Biologia Tropical, v. 47, n. 4, p. 785-790, 1999.
dc.identifier.issn0034-7744
dc.identifier.urihttp://hdl.handle.net/11449/38412
dc.identifier.wosWOS:000087753500015
dc.language.isospa
dc.publisherRevista de Biologia Tropical
dc.relation.ispartofRevista de Biologia Tropical
dc.relation.ispartofjcr0.511
dc.relation.ispartofsjr0,326
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectGuazuma ulmifoliapt
dc.subjectforest seedpt
dc.subjectfruitpt
dc.subjectgerminationpt
dc.subjectseedlingpt
dc.subjectplantletpt
dc.subjectmorphologypt
dc.titleOntogenic development of Guazuma ulmifolia (Sterculiaceae) sapplingsen
dc.typeArtigo
dcterms.licensehttp://www.scielo.sa.cr/revistas/rbt/eaboutj.htm#Copyright
dcterms.rightsHolderRevista de Biologia Tropical

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