Raphidiopsis mediterranea (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to Planktothrix agardhii (Oscillatoriales)

Raphidiopsis mediterranea is a freshwater cyanobacterium that forms toxic blooms in eutrophic water bodies. Factors controlling its proliferation have not been explored in detail. We investigated R. mediterranea autecology by (i) analyzing its dynamics in a hype...

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Detalles Bibliográficos
Autores principales:	Aguilera, Anabella, Aubriot, Luis, Echenique, Ricardo Omar, Donadelli, Jorge Luis, Salerno, Graciela Lidia
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2019
Materias:	Ciencias Naturales Phytoplankton dynamics Alkaline phosphatase Cyanobacterial blooms Eutrophic shallow lake Pho regulon
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/134709
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-134709
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Phytoplankton dynamics Alkaline phosphatase Cyanobacterial blooms Eutrophic shallow lake Pho regulon
spellingShingle	Ciencias Naturales Phytoplankton dynamics Alkaline phosphatase Cyanobacterial blooms Eutrophic shallow lake Pho regulon Aguilera, Anabella Aubriot, Luis Echenique, Ricardo Omar Donadelli, Jorge Luis Salerno, Graciela Lidia <i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)
topic_facet	Ciencias Naturales Phytoplankton dynamics Alkaline phosphatase Cyanobacterial blooms Eutrophic shallow lake Pho regulon
description	<i>Raphidiopsis mediterranea</i> is a freshwater cyanobacterium that forms toxic blooms in eutrophic water bodies. Factors controlling its proliferation have not been explored in detail. We investigated <i>R. mediterranea</i> autecology by (i) analyzing its dynamics in a hypertrophic shallow lake dominated by <i>Planktothrix agardhii</i> (Oscillatoriales) and its relationship with environmental factors; and (ii) studying the effect of light intensity and phosphate availability on <i>R. mediterranea</i> isolates growing in mono or in co-cultures with <i>P. agardhii</i>. The redundancy analysis demonstrated that water temperature, light, and phosphate concentrations were important driving factors for the seasonal succession of the two species. When grown together with <i>P. agardhii</i>, <i>R. mediterranea</i> growth was strongly promoted under the highest light intensity treatment. On the other hand, in monoalgal cultures under phosphorus starvation, both strains exhibited a significant increase in total alkaline phosphatase activity, and changes in the expression of homologs to <i>phoA</i>-like and <i>phoD</i> genes (members of the Pho regulon). However, <i>R. mediterranea</i> showed higher phosphatase activity than <i>P. agardhii</i>, suggesting greater tolerance to phosphate limitation. Taken together, we conclude that physiological features of <i>R. mediterranea</i> play an important role in the coexistence with <i>P. agardhii</i> under environmental changes.
format	Articulo Articulo
author	Aguilera, Anabella Aubriot, Luis Echenique, Ricardo Omar Donadelli, Jorge Luis Salerno, Graciela Lidia
author_facet	Aguilera, Anabella Aubriot, Luis Echenique, Ricardo Omar Donadelli, Jorge Luis Salerno, Graciela Lidia
author_sort	Aguilera, Anabella
title	<i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)
title_short	<i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)
title_full	<i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)
title_fullStr	<i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)
title_full_unstemmed	<i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)
title_sort	<i>raphidiopsis mediterranea</i> (nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>planktothrix agardhii</i> (oscillatoriales)
publishDate	2019
url	http://sedici.unlp.edu.ar/handle/10915/134709
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<i>Raphidiopsis mediterranea</i> (Nostocales) exhibits a flexible growth strategy under light and nutrient fluctuations in contrast to <i>Planktothrix agardhii</i> (Oscillatoriales)

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