Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers

Sudan B and PAS reactions were used for the histochemical detection of lipids and polysaccharides with light microscopy in semithin slides of resin-embedded Oenothera hookeri De VriesThe names of De Vries were adopted in this paper as suggested by Davis (1927, 1934) and not the taxonomic names used...

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Autores principales: Noher de Halac, Inés, Fama, G., Cismondi, Inés Adriana
Formato: Artículo acceptedVersion
Lenguaje:Español
Publicado: 1992
Materias:
R Medicina (General)
Acceso en línea:http://pa.bibdigital.ucc.edu.ar/3709/1/A_Bustos_Bustos_Bracamonte_Romero_Baroni.pdf
Aporte de:
Producción Académica Universidad Católica de Córdoba (UCCor) de Universidad Católica de Córdoba
id I38-R144-3709
record_format dspace
institution Universidad Católica de Córdoba
institution_str I-38
repository_str R-144
collection Producción Académica Universidad Católica de Córdoba (UCCor)
language Español
orig_language_str_mv spa
topic R Medicina (General)
spellingShingle R Medicina (General)
Noher de Halac, Inés
Fama, G.
Cismondi, Inés Adriana
Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers
topic_facet R Medicina (General)
description Sudan B and PAS reactions were used for the histochemical detection of lipids and polysaccharides with light microscopy in semithin slides of resin-embedded Oenothera hookeri De VriesThe names of De Vries were adopted in this paper as suggested by Davis (1927, 1934) and not the taxonomic names used earlier (Noher de Halac et al. 1990) as the plants used were not identical with the actual O. elata H.B.K. anthers at different ontogenic stages. The aim was to establish the variations that occur in both kinds of metabolic products during normal pollen development. In reproductive cells a wave of amylolysis/amylogenesis is observed simultaneously with a lipidic wave. Starch in diploid PMCs is different from starch in the haploid vegetative cell. The gametogenic cell produces neither reserve lipids nor starch. Callose is seen as brilliant white with Sudan B, but is PAS negative at the PMC stage, becoming PAS positive at the tetrad stage. The exine has interbedded lipopolysaccharidic materials. Tapetal plastids show an intense production of lipidic bodies after the vacuolated microspore stage. Lipidic pollen-kitt is present in the immature pollen grains and becomes dissolved at anthesis. Tapetal cells have no cellulosic cell walls from the PMC stage onwards, but they do have a glycocalix. These events have evolutionary significance and will be compared with male-sterile development.
format Artículo
Artículo
acceptedVersion
author Noher de Halac, Inés
Fama, G.
Cismondi, Inés Adriana
author_facet Noher de Halac, Inés
Fama, G.
Cismondi, Inés Adriana
author_sort Noher de Halac, Inés
title Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers
title_short Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers
title_full Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers
title_fullStr Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers
title_full_unstemmed Changes in lipids and polysaccharides during pollen ontogeny in Oenothera anthers
title_sort changes in lipids and polysaccharides during pollen ontogeny in oenothera anthers
publishDate 1992
url http://pa.bibdigital.ucc.edu.ar/3709/1/A_Bustos_Bustos_Bracamonte_Romero_Baroni.pdf
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