Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae

In this study, we performed an anatomical analysis of the polysporangiate anthers and the development of pollen in Isertia laevis (Rubiaceae) with the aim to elucidate the internal structure of these atypical anthers. For this purpose, flowers in successive stages of development were dissected and...

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Autores principales: Judkevich, Marina Daniela, Salas, Roberto Manuel, González, Ana María
Formato: Artículo
Lenguaje:Inglés
Publicado: Springer Verlag GmbH 2024
Materias:
Isertieae
Multiple sporangia
Pollen development
Structure
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/55289
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-55289
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spelling I48-R184-123456789-552892024-10-07T10:35:15Z Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae Judkevich, Marina Daniela Salas, Roberto Manuel González, Ana María Isertieae Multiple sporangia Pollen development Structure In this study, we performed an anatomical analysis of the polysporangiate anthers and the development of pollen in Isertia laevis (Rubiaceae) with the aim to elucidate the internal structure of these atypical anthers. For this purpose, flowers in successive stages of development were dissected and the anthers were processed for conventional anatomical analysis. The material was examined using light microscopy and scanning electron microscopy. The present study shows that the anthers of Isertia laevis have two thecae divided into multiple microsporangia. This division is due to the presence of transverse and longitudinal septa formed of parenchyma and idioblasts with crystals. The septa appear together with the microsporangia and remain in the mature anther, even developing fibrous thickening. As the anther matures, the idioblasts in the septa accumulate crystals until they break, facilitating the separation of the septa from the outer wall of the theca, and thus apparently assisting the process of dehiscence. The mature anther opens through the longitudinal dehiscence of each theca. In addition to the anatomy of the anther, the development and morphology of the pollen, and the presence of orbicules are described. The structure of the anthers of I. laevis is discussed with other polysporangiate species in the Rubiaceae and angiosperms. 2024-09-11T15:06:24Z 2024-09-11T15:06:24Z 2021-05 Artículo Judkevich, Marina Daniela, Salas, Roberto Manuel y González, Ana María, 2021. Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae. En: Protoplasma. Viena: Springer Verlag GmbH, vol. 258, no. 3, p. 547-557. E-ISSN 1615-6102. DOI: https://doi.org/10.1007/s00709-020-01582-1. 0033-183X http://repositorio.unne.edu.ar/handle/123456789/55289 eng https://doi.org/10.1007/s00709-020-01582-1 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 547-557 application/pdf Springer Verlag GmbH Protoplasma, 2021, vol. 258, no. 3, p. 547-557.
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 Isertieae
Multiple sporangia
Pollen development
Structure
spellingShingle Isertieae
Multiple sporangia
Pollen development
Structure
Judkevich, Marina Daniela
Salas, Roberto Manuel
González, Ana María
Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae
topic_facet Isertieae
Multiple sporangia
Pollen development
Structure
description In this study, we performed an anatomical analysis of the polysporangiate anthers and the development of pollen in Isertia laevis (Rubiaceae) with the aim to elucidate the internal structure of these atypical anthers. For this purpose, flowers in successive stages of development were dissected and the anthers were processed for conventional anatomical analysis. The material was examined using light microscopy and scanning electron microscopy. The present study shows that the anthers of Isertia laevis have two thecae divided into multiple microsporangia. This division is due to the presence of transverse and longitudinal septa formed of parenchyma and idioblasts with crystals. The septa appear together with the microsporangia and remain in the mature anther, even developing fibrous thickening. As the anther matures, the idioblasts in the septa accumulate crystals until they break, facilitating the separation of the septa from the outer wall of the theca, and thus apparently assisting the process of dehiscence. The mature anther opens through the longitudinal dehiscence of each theca. In addition to the anatomy of the anther, the development and morphology of the pollen, and the presence of orbicules are described. The structure of the anthers of I. laevis is discussed with other polysporangiate species in the Rubiaceae and angiosperms.
format Artículo
author Judkevich, Marina Daniela
Salas, Roberto Manuel
González, Ana María
author_facet Judkevich, Marina Daniela
Salas, Roberto Manuel
González, Ana María
author_sort Judkevich, Marina Daniela
title Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae
title_short Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae
title_full Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae
title_fullStr Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae
title_full_unstemmed Androecium anatomy of Isertia laevis, a polysporangiate species of Rubiaceae
title_sort androecium anatomy of isertia laevis, a polysporangiate species of rubiaceae
publisher Springer Verlag GmbH
publishDate 2024
url http://repositorio.unne.edu.ar/handle/123456789/55289
work_keys_str_mv AT judkevichmarinadaniela androeciumanatomyofisertialaevisapolysporangiatespeciesofrubiaceae
AT salasrobertomanuel androeciumanatomyofisertialaevisapolysporangiatespeciesofrubiaceae
AT gonzalezanamaria androeciumanatomyofisertialaevisapolysporangiatespeciesofrubiaceae
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