Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology

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Heterocytous cyanobacteria are able to fix nitrogen (in heterocytes) and to produce dormant cells (akinetes). Heterocyte and akinete shape, size, and relative position have taxonomical relevance and possibly ecological value too. We collected—from literature and nature—and compared morphological dat...

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Autores principales: de Tezanos Pinto, P., Kust, A., Devercelli, M., Kozlíková-Zapomělová, E.
Formato: JOUR
Materias:
Akinete
Heterocyte
Phytoplankton
Shape
Size
Traits
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00188158_v764_n1_p_deTezanosPinto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00188158_v764_n1_p_deTezanosPinto
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spelling todo:paper_00188158_v764_n1_p_deTezanosPinto2023-10-03T14:16:11Z Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology de Tezanos Pinto, P. Kust, A. Devercelli, M. Kozlíková-Zapomělová, E. Akinete Heterocyte Phytoplankton Shape Size Traits Heterocytous cyanobacteria are able to fix nitrogen (in heterocytes) and to produce dormant cells (akinetes). Heterocyte and akinete shape, size, and relative position have taxonomical relevance and possibly ecological value too. We collected—from literature and nature—and compared morphological data on vegetative cells, heterocytes, and akinetes across four genera taxonomically separated from Anabaena. In average, heterocyte size doubled that of vegetative cells—probably because of extra cell wall deposition. Heterocyte morphology was remarkably similar across genera, both in size and shape (spherical). The latter may decrease oxygen diffusion from adjoining vegetative cells. Akinetes were huge (one order of magnitude bigger) compared to vegetative cells, probably because of its massive genome replication, extra deposition of wall layers, allocation of storage and number of vegetative cells fused during akinete differentiation. Akinete shape was mostly cylindrical, or oval, but rarely spherical. In line with molecular data, we found morphological differences between Anabaena (non-aerotopated, soil or benthic) and Dolichospermum (aerotopated, planktonic), including vegetative cell size, and akinete size, shape, and relative position to the heterocyte. Differences may relate to adaptations to their contrasting environments (benthic versus planktic). Further research is needed to generalize our results to other heterocytous genera. © 2015 Springer International Publishing Switzerland Fil:de Tezanos Pinto, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Devercelli, M. 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_00188158_v764_n1_p_deTezanosPinto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Akinete
Heterocyte
Phytoplankton
Shape
Size
Traits
spellingShingle Akinete
Heterocyte
Phytoplankton
Shape
Size
Traits
de Tezanos Pinto, P.
Kust, A.
Devercelli, M.
Kozlíková-Zapomělová, E.
Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
topic_facet Akinete
Heterocyte
Phytoplankton
Shape
Size
Traits
description Heterocytous cyanobacteria are able to fix nitrogen (in heterocytes) and to produce dormant cells (akinetes). Heterocyte and akinete shape, size, and relative position have taxonomical relevance and possibly ecological value too. We collected—from literature and nature—and compared morphological data on vegetative cells, heterocytes, and akinetes across four genera taxonomically separated from Anabaena. In average, heterocyte size doubled that of vegetative cells—probably because of extra cell wall deposition. Heterocyte morphology was remarkably similar across genera, both in size and shape (spherical). The latter may decrease oxygen diffusion from adjoining vegetative cells. Akinetes were huge (one order of magnitude bigger) compared to vegetative cells, probably because of its massive genome replication, extra deposition of wall layers, allocation of storage and number of vegetative cells fused during akinete differentiation. Akinete shape was mostly cylindrical, or oval, but rarely spherical. In line with molecular data, we found morphological differences between Anabaena (non-aerotopated, soil or benthic) and Dolichospermum (aerotopated, planktonic), including vegetative cell size, and akinete size, shape, and relative position to the heterocyte. Differences may relate to adaptations to their contrasting environments (benthic versus planktic). Further research is needed to generalize our results to other heterocytous genera. © 2015 Springer International Publishing Switzerland
format JOUR
author de Tezanos Pinto, P.
Kust, A.
Devercelli, M.
Kozlíková-Zapomělová, E.
author_facet de Tezanos Pinto, P.
Kust, A.
Devercelli, M.
Kozlíková-Zapomělová, E.
author_sort de Tezanos Pinto, P.
title Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
title_short Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
title_full Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
title_fullStr Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
title_full_unstemmed Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
title_sort morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
url http://hdl.handle.net/20.500.12110/paper_00188158_v764_n1_p_deTezanosPinto
work_keys_str_mv AT detezanospintop morphologicaltraitsinnitrogenfixingheterocytouscyanobacteriapossiblelinksbetweenmorphologyandecophysiology
AT kusta morphologicaltraitsinnitrogenfixingheterocytouscyanobacteriapossiblelinksbetweenmorphologyandecophysiology
AT devercellim morphologicaltraitsinnitrogenfixingheterocytouscyanobacteriapossiblelinksbetweenmorphologyandecophysiology
AT kozlikovazapomelovae morphologicaltraitsinnitrogenfixingheterocytouscyanobacteriapossiblelinksbetweenmorphologyandecophysiology
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