1. Repositório Institucional da UFMG
  2. Publicações Científicas e Culturais
  3. Artigo de Periódico
Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/41787
Full metadata record
DC FieldValueLanguage
dc.creatorÂngela Maria da Silva Sousapt_BR
dc.creatorPaulo Sérgio Nascimento Lopespt_BR
dc.creatorLeonardo Monteiro Ribeiropt_BR
dc.creatorMonielly Soares Andradept_BR
dc.creatorMaria Olívia Mercadante-Simõespt_BR
dc.date.accessioned2022-05-18T14:38:14Z-
dc.date.available2022-05-18T14:38:14Z-
dc.date.issued2017-
dc.citation.volume31pt_BR
dc.citation.spage887pt_BR
dc.citation.epage902pt_BR
dc.identifier.doi10.1007/s00468-016-1514-2pt_BR
dc.identifier.issn1432-2285pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/41787-
dc.description.resumoCaryocar brasiliense is an arboreal species widely distributed in the highly seasonal Cerrado (neotropical savanna) biome. The oleaginous fruits of this species are important to the local fauna and as a source of income for traditional human populations. As the diaspores have peculiar structures and pronounced dormancy, we sought to examine the interactions between the morphoanatomy of the pyrene (the seed enveloped by the endocarp) and physiological aspects of germination. We describe here the morphology of the pyrene, the anatomy, histochemistry, and ultrastructure of the seed during the germination process, and evaluate the effect of gibberellic acid (GA3) on the germination of isolated seeds or those still contained within the endocarp. The hard and aculeate endocarp protects the embryo and retards water absorption—thereby controlling germination under natural conditions. The seed coat is thin, unlignified, and rich in phenolic compounds. The embryo is hypocotyledonary, has differentiated vascular bundles, and abundant proteic and lipidc reserves. The physiological dormancy of this species is related to the low growth potential of its embryo and mechanical restraints imposed by the endocarp. Germination is associated with hypocotyl growth through cell expansion (stimulated by GA3)—which promotes the cracking of the endocarp, and thus allows radicle and plumule protrusion. The anatomical characteristics and physiological dormancy of C. brasiliense pyrenes restrict germination to the most propitious occasions and favor the establishment of seedlings in Cerrado environments.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIASpt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofTrees Structure and Functionpt_BR
dc.rightsAcesso Abertopt_BR
dc.subject.otherPequipt_BR
dc.subject.otherPlantas oleaginosaspt_BR
dc.subject.otherSementes - Dormênciapt_BR
dc.subject.otherGerminaçãopt_BR
dc.subject.otherMorfologia vegetalpt_BR
dc.titleStructural aspects of germination control in pyrenes of Caryocar brasiliense (Caryocaraceae)pt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://link.springer.com/article/10.1007/s00468-016-1514-2pt_BR
Appears in Collections:Artigo de Periódico

Files in This Item:
File Description SizeFormat 
Structural aspects of germination control in pyrenes of Caryocar brasiliense (Caryocaraceae).pdf4.23 MBAdobe PDFView/Open
Show simple item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.