Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters

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The perianth organs of six species of Nymphaeaceae, representing Euryale, Nymphaea and Victoria, were studied on the basis of macroscopical, micromorphological, and anatomical characters. The aims were to determine whether perianth is differentiated among tepal whorls considering the presence of sep...

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Autores principales: Zini, Lucía Melisa, Galati, Beatriz Gloria, Ferrucci, María Silvia
Formato: Artículo
Lenguaje:Inglés
Publicado: Sociedad Botánica de Japón 2025
Materias:
Anatomy
Cuticular ornamentation
Euryale
Nymphaea
Perianth
Victoria
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59375
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-59375
record_format dspace
spelling I48-R184-123456789-593752025-12-15T12:04:12Z Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters Zini, Lucía Melisa Galati, Beatriz Gloria Ferrucci, María Silvia Anatomy Cuticular ornamentation Euryale Nymphaea Perianth Victoria The perianth organs of six species of Nymphaeaceae, representing Euryale, Nymphaea and Victoria, were studied on the basis of macroscopical, micromorphological, and anatomical characters. The aims were to determine whether perianth is differentiated among tepal whorls considering the presence of sepaloid and petaloid characters, and to evaluate the occurrence of both features in individual tepals. Selected perianth series were examined macroscopically, with light microscopy, and scanning electron microscopy. Osmophores were detected using neutral red and Sudan. In all tepals examined, stomata and hydropotes were present on the abaxial and adaxial surfaces. These are anomocytic or stephanocytic; hydropotes of irregular type are also present. The outer series of tepals display morphoanatomical characters in most part related with photosynthetic and protective functions. Osmophore activity is very scarce and petaloid epidermal morphology is present only in N. lotus, thus allowing interpretation of this whorl as primarily sepaloid. The second series exhibits both petal-like and sepal-like characters; in N. amazonum and N. gardneriana sepaloid and petaloid group of cells are present on the abaxial surface of individual tepals. Therefore, this whorl is transitional between the outer and the innermost ones. Both the morpho-anatomy and presence of osmophore activity indicate that the innermost series is entirely petaloid. Inner tepals of E. ferox, N. alba, and V. cruziana share the presence of epidermal cells with predominantly smooth cuticle, whereas those of N. amazonum, N. gardneriana, and N. lotus share a cuticular ornamentation consisting of numerous papillae on each cell. Morphological characters of the perianth epidermis are in some respects congruent with the molecular phylogeny of Nymphaeaceae. Our results support the co-expression of sepaloidy and petaloidy within individual tepals and the mosaic model of perianth evolution proposed for the angiosperms. 2025-12-15T11:33:05Z 2025-12-15T11:33:05Z 2017-07-21 Artículo Zini, Lucía Melisa, Galati, Beatriz Gloria y Ferrucci, María Silvia, 2017. Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters. Journal of Plant Research. Sakai: Sociedad Botánica de Japón, vol. 130, p. 1047-1060. E-ISSN 1618-0860. DOI https://doi.org/10.1007/s10265-017-0963-z 0918-9440 http://repositorio.unne.edu.ar/handle/123456789/59375 en https://doi.org/10.1007/s10265-017-0963-z restrictedAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 1047-1060 application/pdf Sociedad Botánica de Japón Journal of Plant Research, 2017, vol. 130, p. 1047-1060.
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 Anatomy
Cuticular ornamentation
Euryale
Nymphaea
Perianth
Victoria
spellingShingle Anatomy
Cuticular ornamentation
Euryale
Nymphaea
Perianth
Victoria
Zini, Lucía Melisa
Galati, Beatriz Gloria
Ferrucci, María Silvia
Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters
topic_facet Anatomy
Cuticular ornamentation
Euryale
Nymphaea
Perianth
Victoria
description The perianth organs of six species of Nymphaeaceae, representing Euryale, Nymphaea and Victoria, were studied on the basis of macroscopical, micromorphological, and anatomical characters. The aims were to determine whether perianth is differentiated among tepal whorls considering the presence of sepaloid and petaloid characters, and to evaluate the occurrence of both features in individual tepals. Selected perianth series were examined macroscopically, with light microscopy, and scanning electron microscopy. Osmophores were detected using neutral red and Sudan. In all tepals examined, stomata and hydropotes were present on the abaxial and adaxial surfaces. These are anomocytic or stephanocytic; hydropotes of irregular type are also present. The outer series of tepals display morphoanatomical characters in most part related with photosynthetic and protective functions. Osmophore activity is very scarce and petaloid epidermal morphology is present only in N. lotus, thus allowing interpretation of this whorl as primarily sepaloid. The second series exhibits both petal-like and sepal-like characters; in N. amazonum and N. gardneriana sepaloid and petaloid group of cells are present on the abaxial surface of individual tepals. Therefore, this whorl is transitional between the outer and the innermost ones. Both the morpho-anatomy and presence of osmophore activity indicate that the innermost series is entirely petaloid. Inner tepals of E. ferox, N. alba, and V. cruziana share the presence of epidermal cells with predominantly smooth cuticle, whereas those of N. amazonum, N. gardneriana, and N. lotus share a cuticular ornamentation consisting of numerous papillae on each cell. Morphological characters of the perianth epidermis are in some respects congruent with the molecular phylogeny of Nymphaeaceae. Our results support the co-expression of sepaloidy and petaloidy within individual tepals and the mosaic model of perianth evolution proposed for the angiosperms.
format Artículo
author Zini, Lucía Melisa
Galati, Beatriz Gloria
Ferrucci, María Silvia
author_facet Zini, Lucía Melisa
Galati, Beatriz Gloria
Ferrucci, María Silvia
author_sort Zini, Lucía Melisa
title Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters
title_short Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters
title_full Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters
title_fullStr Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters
title_full_unstemmed Perianth organs in Nymphaeaceae : comparative study on epidermal and structural characters
title_sort perianth organs in nymphaeaceae : comparative study on epidermal and structural characters
publisher Sociedad Botánica de Japón
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/59375
work_keys_str_mv AT ziniluciamelisa perianthorgansinnymphaeaceaecomparativestudyonepidermalandstructuralcharacters
AT galatibeatrizgloria perianthorgansinnymphaeaceaecomparativestudyonepidermalandstructuralcharacters
AT ferruccimariasilvia perianthorgansinnymphaeaceaecomparativestudyonepidermalandstructuralcharacters
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