Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)

Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)

Tapetum, orbicule, and pollen grain ontogeny in Colletia paradoxa and Discaria americana were studied with transmission electron microscopy (TEM). The ultrastructural changes observed during the different stages of development in the tapetal cells and related to orbicule and pollen grain formation a...

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Main Authors: M. Gotelli, B. Galati, D. Medan
Format: Article
Language:English
Published: Hindawi Limited 2012-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1100/2012/948469
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spelling doaj-b32ccd989ae74af6bc38b1439c3cd9e02020-11-25T00:58:58ZengHindawi LimitedThe Scientific World Journal1537-744X2012-01-01201210.1100/2012/948469948469Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)M. Gotelli0B. Galati1D. Medan2Grupo de Biología Reproductiva en Plantas Superiores, Cátedra de Botánica Agrícola, Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, 1417 Buenos Aires, ArgentinaGrupo de Biología Reproductiva en Plantas Superiores, Cátedra de Botánica Agrícola, Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, 1417 Buenos Aires, ArgentinaGrupo de Biología Reproductiva en Plantas Superiores, Cátedra de Botánica Agrícola, Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, 1417 Buenos Aires, ArgentinaTapetum, orbicule, and pollen grain ontogeny in Colletia paradoxa and Discaria americana were studied with transmission electron microscopy (TEM). The ultrastructural changes observed during the different stages of development in the tapetal cells and related to orbicule and pollen grain formation are described. The proorbicules have the appearance of lipid globule, and their formation is related to the endoplasmic reticulum of rough type (ERr). This is the first report on the presence of orbicules in the family Rhamnaceae. Pollen grains are shed at the bicellular stage.http://dx.doi.org/10.1100/2012/948469
collection DOAJ
language English
format Article
sources DOAJ
author M. Gotelli
B. Galati
D. Medan
spellingShingle M. Gotelli
B. Galati
D. Medan
Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)
The Scientific World Journal
author_facet M. Gotelli
B. Galati
D. Medan
author_sort M. Gotelli
title Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)
title_short Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)
title_full Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)
title_fullStr Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)
title_full_unstemmed Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)
title_sort pollen, tapetum, and orbicule development in colletia paradoxa and discaria americana (rhamnaceae)
publisher Hindawi Limited
series The Scientific World Journal
issn 1537-744X
publishDate 2012-01-01
description Tapetum, orbicule, and pollen grain ontogeny in Colletia paradoxa and Discaria americana were studied with transmission electron microscopy (TEM). The ultrastructural changes observed during the different stages of development in the tapetal cells and related to orbicule and pollen grain formation are described. The proorbicules have the appearance of lipid globule, and their formation is related to the endoplasmic reticulum of rough type (ERr). This is the first report on the presence of orbicules in the family Rhamnaceae. Pollen grains are shed at the bicellular stage.
url http://dx.doi.org/10.1100/2012/948469
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AT bgalati pollentapetumandorbiculedevelopmentincolletiaparadoxaanddiscariaamericanarhamnaceae
AT dmedan pollentapetumandorbiculedevelopmentincolletiaparadoxaanddiscariaamericanarhamnaceae
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