Embryology of Helianthus annuus (Asteraceae)

Abortion of sunflower fruits during different phases of their development could be due to abnormalities in the reproductive process. We report a comparative study of the sporogenesis, gametogenesis and the development of the related sporophytic structures in three commercial hybrids, DK 4050, CF 17...

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Autores principales: Gotelli, M.M., Galati, B.G., Medan, D.
Formato: JOUR
Materias:
Embryology
Gametogenesis
Helianthus annuus
Sporogenesis
Asteraceae
Endothecium
Helianthus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00033847_v45_n2_p81_Gotelli
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00033847_v45_n2_p81_Gotelli
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spelling todo:paper_00033847_v45_n2_p81_Gotelli2023-10-03T13:56:17Z Embryology of Helianthus annuus (Asteraceae) Gotelli, M.M. Galati, B.G. Medan, D. Embryology Gametogenesis Helianthus annuus Sporogenesis Asteraceae Endothecium Helianthus Helianthus annuus Abortion of sunflower fruits during different phases of their development could be due to abnormalities in the reproductive process. We report a comparative study of the sporogenesis, gametogenesis and the development of the related sporophytic structures in three commercial hybrids, DK 4050, CF 17 and P30, and a line, HA 89. The anther wall consists of epidermis, endothecium, one middle layer and a plasmodial tapetum with binucleate cells before integrating. A peritapetal membrane with orbicules encloses the pollen grains, which are triporate, angulaperturate and shed at tricellular stage. HA 89 also presents tetraporate pollen grains. The ovule is tenuinucellate, unitegmic and anatropous. The young female gametophyte consists of six cells and eight nuclei. Antipodals, which vary in number and in the number of nuclei in each cell, usually have thick walls between themselves and the central cell. Differences among the genotypes studied may explain the contradictions found on previous accounts. © Finnish Zoological and Botanical Publishing Board 2008. Fil:Gotelli, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Galati, B.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00033847_v45_n2_p81_Gotelli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Embryology
Gametogenesis
Helianthus annuus
Sporogenesis
Asteraceae
Endothecium
Helianthus
Helianthus annuus
spellingShingle Embryology
Gametogenesis
Helianthus annuus
Sporogenesis
Asteraceae
Endothecium
Helianthus
Helianthus annuus
Gotelli, M.M.
Galati, B.G.
Medan, D.
Embryology of Helianthus annuus (Asteraceae)
topic_facet Embryology
Gametogenesis
Helianthus annuus
Sporogenesis
Asteraceae
Endothecium
Helianthus
Helianthus annuus
description Abortion of sunflower fruits during different phases of their development could be due to abnormalities in the reproductive process. We report a comparative study of the sporogenesis, gametogenesis and the development of the related sporophytic structures in three commercial hybrids, DK 4050, CF 17 and P30, and a line, HA 89. The anther wall consists of epidermis, endothecium, one middle layer and a plasmodial tapetum with binucleate cells before integrating. A peritapetal membrane with orbicules encloses the pollen grains, which are triporate, angulaperturate and shed at tricellular stage. HA 89 also presents tetraporate pollen grains. The ovule is tenuinucellate, unitegmic and anatropous. The young female gametophyte consists of six cells and eight nuclei. Antipodals, which vary in number and in the number of nuclei in each cell, usually have thick walls between themselves and the central cell. Differences among the genotypes studied may explain the contradictions found on previous accounts. © Finnish Zoological and Botanical Publishing Board 2008.
format JOUR
author Gotelli, M.M.
Galati, B.G.
Medan, D.
author_facet Gotelli, M.M.
Galati, B.G.
Medan, D.
author_sort Gotelli, M.M.
title Embryology of Helianthus annuus (Asteraceae)
title_short Embryology of Helianthus annuus (Asteraceae)
title_full Embryology of Helianthus annuus (Asteraceae)
title_fullStr Embryology of Helianthus annuus (Asteraceae)
title_full_unstemmed Embryology of Helianthus annuus (Asteraceae)
title_sort embryology of helianthus annuus (asteraceae)
url http://hdl.handle.net/20.500.12110/paper_00033847_v45_n2_p81_Gotelli
work_keys_str_mv AT gotellimm embryologyofhelianthusannuusasteraceae
AT galatibg embryologyofhelianthusannuusasteraceae
AT medand embryologyofhelianthusannuusasteraceae
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