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Observações citológicas em Coffea. XVII - O saco embrionário em Coffea canephora Pierre ex Froehner

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dc.contributor.author Mendes, Cândida H. T.
dc.date.accessioned 2019-01-21T10:53:55Z
dc.date.available 2019-01-21T10:53:55Z
dc.date.issued 1950-04
dc.identifier.citation MENDES, C. H. T. Observações citológicas em Coffea. XVII - O saco embrionário em Coffea canephora Pierre ex Froehner. Bragantia, Campinas, v. 10, n. 4, p. 105-111, 1950. pt_BR
dc.identifier.issn 1678-4499
dc.identifier.uri http://dx.doi.org/10.1590/S0006-87051950000400002 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/10997
dc.description.abstract A study has been made of the embryo sac in self-sterile Coffea canephora flowers of different ages. The process was observed to be normal and included the formation of two synergides and one egg cell in the micropilar region, three antipodals at the chalazal region and two polar nuclei lying in the middle of the sac. It is known that in the species C. arabica the embryo sac formation is complete at the time the flowers open. Embryo sac formation in C. canephora is slightly delayed and it is not complete until the day following opening of the flowers. It was also determined that in C. canephora shedding of pollen begins shortly after the flowers open and the pollen was functional at least for two days. Thus the results of the present study indicate that the self-sterility of C. canephora flowers is not due to the delay in formation or abnormal development of the embryo sac. pt_BR
dc.format pdf pt_BR
dc.language.iso pt_BR pt_BR
dc.publisher Instituto Agronômico (IAC) pt_BR
dc.relation.ispartofseries Bragantia;v. 10, n. 4, p. 105-111,1950;
dc.rights Open Access pt_BR
dc.subject.classification Cafeicultura::Genética e melhoramento pt_BR
dc.title Observações citológicas em Coffea. XVII - O saco embrionário em Coffea canephora Pierre ex Froehner pt_BR
dc.type Artigo pt_BR

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