Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications

We investigated the morphology and structure of the floral nectary in 11 Neotropical genera belonging to the subfamilies Dodonaeoideae and Paullinioideae (Sapindaceae) from southern South America representing three tribes (Dodonaeaeae, Paullinieae, and Melicocceae), in relation to other floral trait...

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Autores principales: Solís, Stella Maris, Zini, Lucía Melisa, González, Valeria Vanesa, Ferrucci, María Silvia
Formato: Artículo
Lenguaje:Inglés
Publicado: Springer 2022
Materias:
Color change
Morphology
Nectarostomata
Sapindaceae floral nectary
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/47817
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-47817
record_format dspace
spelling I48-R184-123456789-478172024-10-03T12:19:59Z Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications Solís, Stella Maris Zini, Lucía Melisa González, Valeria Vanesa Ferrucci, María Silvia Color change Morphology Nectarostomata Sapindaceae floral nectary We investigated the morphology and structure of the floral nectary in 11 Neotropical genera belonging to the subfamilies Dodonaeoideae and Paullinioideae (Sapindaceae) from southern South America representing three tribes (Dodonaeaeae, Paullinieae, and Melicocceae), in relation to other floral traits in species with contrasting morphological flower characteristics. Nectary organization was analyzed under light, stereoscopic, and scanning electron microscopes; Diplokeleba floribunda N.E. Br. was also observed using transmission electron microscopy. Our comparative data may contribute to the understanding of floral nectary evolution and systematic value in this family. The nectaries were studied in both staminate and pistillate flowers. All the floral nectaries are typical of Sapindaceae: extrastaminal, receptacular, structured, and persistent. The anatomical analysis revealed a differentiated secretory parenchyma and an inner non-secretory parenchyma; the nectary is supplied by phloem traces and, less frequently, by phloem and xylem traces. Nectar is secreted through nectarostomata of anomocytic type. The anatomical analysis showed the absence of nectary in the three morphs of Dodonaea viscosa flowers. Nectary ultrastructure is described in D. floribunda. In this species, the change in nectary color is related to progressive accumulation of anthocyanins during the functional phase. We found relatively small variation in the nectary structural characteristics compared with large variation in nectary morphology. The latter aspect agreed with the main infrafamilial groupings revealed by recent phylogenetic studies, so it is of current valuable systematic importance for Sapindaceae. In representatives of Paullinieae, the reduction of the floral nectary to 4–2 posterior lobes should be interpreted as a derived character state. 2022-05-24T12:31:30Z 2022-05-24T12:31:30Z 2017 Artículo Solís, Stella Maris, et. al., 2017. Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications. Protoplasma. Viena: Springer, vol. 254, no. 6, p. 2169-2188. ISSN 0033-183X. 0033-183X http://repositorio.unne.edu.ar/handle/123456789/47817 eng https://link.springer.com/article/10.1007/s00709-017-1108-x openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Springer Protoplasma, 2017, vol. 254, no. 6, p. 2169-2188.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Color change
Morphology
Nectarostomata
Sapindaceae floral nectary
spellingShingle Color change
Morphology
Nectarostomata
Sapindaceae floral nectary
Solís, Stella Maris
Zini, Lucía Melisa
González, Valeria Vanesa
Ferrucci, María Silvia
Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
topic_facet Color change
Morphology
Nectarostomata
Sapindaceae floral nectary
description We investigated the morphology and structure of the floral nectary in 11 Neotropical genera belonging to the subfamilies Dodonaeoideae and Paullinioideae (Sapindaceae) from southern South America representing three tribes (Dodonaeaeae, Paullinieae, and Melicocceae), in relation to other floral traits in species with contrasting morphological flower characteristics. Nectary organization was analyzed under light, stereoscopic, and scanning electron microscopes; Diplokeleba floribunda N.E. Br. was also observed using transmission electron microscopy. Our comparative data may contribute to the understanding of floral nectary evolution and systematic value in this family. The nectaries were studied in both staminate and pistillate flowers. All the floral nectaries are typical of Sapindaceae: extrastaminal, receptacular, structured, and persistent. The anatomical analysis revealed a differentiated secretory parenchyma and an inner non-secretory parenchyma; the nectary is supplied by phloem traces and, less frequently, by phloem and xylem traces. Nectar is secreted through nectarostomata of anomocytic type. The anatomical analysis showed the absence of nectary in the three morphs of Dodonaea viscosa flowers. Nectary ultrastructure is described in D. floribunda. In this species, the change in nectary color is related to progressive accumulation of anthocyanins during the functional phase. We found relatively small variation in the nectary structural characteristics compared with large variation in nectary morphology. The latter aspect agreed with the main infrafamilial groupings revealed by recent phylogenetic studies, so it is of current valuable systematic importance for Sapindaceae. In representatives of Paullinieae, the reduction of the floral nectary to 4–2 posterior lobes should be interpreted as a derived character state.
format Artículo
author Solís, Stella Maris
Zini, Lucía Melisa
González, Valeria Vanesa
Ferrucci, María Silvia
author_facet Solís, Stella Maris
Zini, Lucía Melisa
González, Valeria Vanesa
Ferrucci, María Silvia
author_sort Solís, Stella Maris
title Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
title_short Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
title_full Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
title_fullStr Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
title_full_unstemmed Floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
title_sort floral nectaries in sapindaceae s.s. : morphological and structural diversity, and their systematic implications
publisher Springer
publishDate 2022
url http://repositorio.unne.edu.ar/handle/123456789/47817
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AT ziniluciamelisa floralnectariesinsapindaceaessmorphologicalandstructuraldiversityandtheirsystematicimplications
AT gonzalezvaleriavanesa floralnectariesinsapindaceaessmorphologicalandstructuraldiversityandtheirsystematicimplications
AT ferruccimariasilvia floralnectariesinsapindaceaessmorphologicalandstructuraldiversityandtheirsystematicimplications
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