Structural aspects of germination control in pyrenes of Caryocar brasiliense (Caryocaraceae)

Página do item simplificado
dc.creatorÂngela Maria da Silva Sousa
dc.creatorPaulo Sérgio Nascimento Lopes
dc.creatorLeonardo Monteiro Ribeiro
dc.creatorMonielly Soares Andrade
dc.creatorMaria Olívia Mercadante-Simões
dc.date.accessioned2022-05-18T14:38:14Z
dc.date.accessioned2025-09-08T23:43:54Z
dc.date.available2022-05-18T14:38:14Z
dc.date.issued2017
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doi10.1007/s00468-016-1514-2
dc.identifier.issn1432-2285
dc.identifier.urihttps://hdl.handle.net/1843/41787
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofTrees Structure and Function
dc.rightsAcesso Aberto
dc.subjectPequi
dc.subjectPlantas oleaginosas
dc.subjectSementes - Dormência
dc.subjectGerminação
dc.subjectMorfologia vegetal
dc.titleStructural aspects of germination control in pyrenes of Caryocar brasiliense (Caryocaraceae)
dc.typeArtigo de periódico
local.citation.epage902
local.citation.spage887
local.citation.volume31
local.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.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1007/s00468-016-1514-2

Arquivos

Pacote original

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Structural aspects of germination control in pyrenes of Caryocar brasiliense (Caryocaraceae).pdf
Tamanho:
4.13 MB
Formato:
Adobe Portable Document Format
Baixar

Licença do pacote

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
License.txt
Tamanho:
1.99 KB
Formato:
Plain Text
Descrição:
Baixar

Coleções

Artigo de Periódico

Logo UFMG