Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae)
Background and aims: The onion (Allium cepa var. cepa) is an allogamous species in which male-sterile lines have been developed. However, the structure of the flower and floral nectaries have only been briefly described. The objective of this study is to update the floral anatomy data, comparing the...
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| Formato: | Artículo revista |
| Lenguaje: | Inglés |
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Sociedad Argentina de Botánica
2023
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/38251 |
| Aporte de: |
| id |
I10-R325-article-38251 |
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| record_format |
ojs |
| institution |
Universidad Nacional de Córdoba |
| institution_str |
I-10 |
| repository_str |
R-325 |
| container_title_str |
Boletín de la Sociedad Argentina de Botánica |
| language |
Inglés |
| format |
Artículo revista |
| topic |
anteras bolsillo nectarífero cebolla dehiscencia nectario ginopleural nectario septal. anther dehiscence gynopleural nectary nectary pocket onion septal nectary |
| spellingShingle |
anteras bolsillo nectarífero cebolla dehiscencia nectario ginopleural nectario septal. anther dehiscence gynopleural nectary nectary pocket onion septal nectary Gonzalez, Ana Maria Maldonado, Irma B. Galmarini, Claudio Peralta, Iris Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) |
| topic_facet |
anteras bolsillo nectarífero cebolla dehiscencia nectario ginopleural nectario septal. anther dehiscence gynopleural nectary nectary pocket onion septal nectary |
| author |
Gonzalez, Ana Maria Maldonado, Irma B. Galmarini, Claudio Peralta, Iris |
| author_facet |
Gonzalez, Ana Maria Maldonado, Irma B. Galmarini, Claudio Peralta, Iris |
| author_sort |
Gonzalez, Ana Maria |
| title |
Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) |
| title_short |
Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) |
| title_full |
Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) |
| title_fullStr |
Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) |
| title_full_unstemmed |
Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) |
| title_sort |
floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (allium cepa, amaryllidaceae) |
| description |
Background and aims: The onion (Allium cepa var. cepa) is an allogamous species in which male-sterile lines have been developed. However, the structure of the flower and floral nectaries have only been briefly described. The objective of this study is to update the floral anatomy data, comparing the gynoecium and androecium of male-fertile and male-sterile lines, and to analyze the three-dimensional structure of the floral nectary.
M&M: Conventional optical and scanning electron microscopy techniques were used.
Results: Fertile and sterile male flowers have the same structural organization. The septal or gynopleural nectary is organized in three zones: 1) production area formed by the glandular tissue arranged radially in the septa of the ovary, 2) discharge zone: a small channel at the apex connects the nectariferous tissue with the pocket formed between the ovary wall and the overlying ridge, and 3) presentation and harvest zone, where the excreted nectar accumulates, formed between the widened base of the inner staminal filaments opposite the ovary.
Conclusions: The only anatomical differences in the flowers sterile male lines are the lack of pollen production and the absence of dehiscence, despite having a normal stomium and anther wall. The floral nectaries of onion are a clear example of secondary presentation of nectar. |
| publisher |
Sociedad Argentina de Botánica |
| publishDate |
2023 |
| url |
https://revistas.unc.edu.ar/index.php/BSAB/article/view/38251 |
| work_keys_str_mv |
AT gonzalezanamaria floralnectarystructurenectarpresentationandmorphoanatomicalanalysisofmalefertileandmalesterileanthersinonionalliumcepaamaryllidaceae AT maldonadoirmab floralnectarystructurenectarpresentationandmorphoanatomicalanalysisofmalefertileandmalesterileanthersinonionalliumcepaamaryllidaceae AT galmariniclaudio floralnectarystructurenectarpresentationandmorphoanatomicalanalysisofmalefertileandmalesterileanthersinonionalliumcepaamaryllidaceae AT peraltairis floralnectarystructurenectarpresentationandmorphoanatomicalanalysisofmalefertileandmalesterileanthersinonionalliumcepaamaryllidaceae AT gonzalezanamaria estructuradelnectariofloralpresentaciondelnectaryanalisismorfoanatomicodeanterasdelineasandrofertilesyandroesterilesencebollaalliumcepaamaryllidaceae AT maldonadoirmab estructuradelnectariofloralpresentaciondelnectaryanalisismorfoanatomicodeanterasdelineasandrofertilesyandroesterilesencebollaalliumcepaamaryllidaceae AT galmariniclaudio estructuradelnectariofloralpresentaciondelnectaryanalisismorfoanatomicodeanterasdelineasandrofertilesyandroesterilesencebollaalliumcepaamaryllidaceae AT peraltairis estructuradelnectariofloralpresentaciondelnectaryanalisismorfoanatomicodeanterasdelineasandrofertilesyandroesterilesencebollaalliumcepaamaryllidaceae |
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2024-09-03T22:50:21Z |
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2024-09-03T22:50:21Z |
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I10-R325-article-382512023-11-15T16:43:29Z Floral nectary structure, nectar presentation and morpho-anatomical analysis of male‐fertile and male‐sterile anthers in onion (Allium cepa, Amaryllidaceae) Estructura del nectario floral, presentación del néctar y análisis morfo-anatómico de anteras de líneas androfértiles y androestériles en cebolla (Allium cepa, Amaryllidaceae) Gonzalez, Ana Maria Maldonado, Irma B. Galmarini, Claudio Peralta, Iris anteras bolsillo nectarífero cebolla dehiscencia nectario ginopleural nectario septal. anther dehiscence gynopleural nectary nectary pocket onion septal nectary Background and aims: The onion (Allium cepa var. cepa) is an allogamous species in which male-sterile lines have been developed. However, the structure of the flower and floral nectaries have only been briefly described. The objective of this study is to update the floral anatomy data, comparing the gynoecium and androecium of male-fertile and male-sterile lines, and to analyze the three-dimensional structure of the floral nectary. M&M: Conventional optical and scanning electron microscopy techniques were used. Results: Fertile and sterile male flowers have the same structural organization. The septal or gynopleural nectary is organized in three zones: 1) production area formed by the glandular tissue arranged radially in the septa of the ovary, 2) discharge zone: a small channel at the apex connects the nectariferous tissue with the pocket formed between the ovary wall and the overlying ridge, and 3) presentation and harvest zone, where the excreted nectar accumulates, formed between the widened base of the inner staminal filaments opposite the ovary. Conclusions: The only anatomical differences in the flowers sterile male lines are the lack of pollen production and the absence of dehiscence, despite having a normal stomium and anther wall. The floral nectaries of onion are a clear example of secondary presentation of nectar. Introducción y objetivos: La cebolla (Allium cepa var. cepa) es una especie alógama, donde se han desarrollado líneas androestériles. La estructura floral y la de sus nectarios florales ha sido descrita de manera somera e incompleta. El objetivo del presente trabajo es actualizar los datos de la anatomía floral comparando líneas fértiles y androestériles y analizar la estructura tridimensional del nectario floral. M&M: Se utilizaron técnicas convencionales de microscopía óptica y electrónica de barrido. Resultados: Las flores fértiles y androestériles presentan la misma organización estructural. El nectario septal o ginopleural se organiza en tres zonas: 1) área productora formada por el tejido glandular dispuesto radialmente en los septos del ovario, 2) zona de descarga: un pequeño canal en el ápice conecta el tejido nectarífero con el bolsillo formado entre la pared del ovario y la cresta que los cubre, y 3) zona de presentación y cosecha, donde el néctar excretado se acumula, formada entre la base ensanchada de los filamentos estaminales internos y la base del ovario. Conclusiones: Las únicas diferencias anatómicas en las flores de las líneas androestériles y las fértiles radican en la falta de producción de granos de polen y la ausencia de dehiscencia, pese a presentar estomio y pared de anteras normales. Los nectarios florales de la cebolla son un claro ejemplo de presentación secundaria del néctar. Sociedad Argentina de Botánica 2023-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/BSAB/article/view/38251 10.31055/1851.2372.v58.n3.38251 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 58 No. 3 (2023): September. Special Issue: Amaryllidaceae Boletín de la Sociedad Argentina de Botánica; Vol. 58 Núm. 3 (2023): Septiembre. Número especial: Amaryllidaceae Boletín de la Sociedad Argentina de Botánica; v. 58 n. 3 (2023): Setembro. Edição especial: Amaryllidaceae 1851-2372 0373-580X 10.31055/1851.2372.v58.n3 eng https://revistas.unc.edu.ar/index.php/BSAB/article/view/38251/41264 https://revistas.unc.edu.ar/index.php/BSAB/article/view/38251/41265 Derechos de autor 2023 Ana Maria Gonzalez, Irma B. Maldonado, Claudio Galmarini, Iris Peralta https://creativecommons.org/licenses/by-nc-nd/4.0 |