Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta

ABSTRACT Navicula incerta is a benthic diatom with potential use in nutrition and health for humans and aquaculture. Therefore, it is important to know its optimal growth conditions and biochemical composition. In this study, the effects of nitrate and silicate concentration on the growth kinetics a...

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Autores principales:	Encinas-Arzate,José Jesús, Marquez-Ríos,Enrique, López-Elías,José Antonio, Torres-Areola,Wilfrido, Huerta-Ocampo,José Ángel, Ramírez-Suárez,Juan Carlos
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2020
Materias:	Navicula incerta stress response growth lipid production proximal composition nutrient limiting chlorophyll
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000200280
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spelling	oai:scielo:S0718-560X20200002002802020-05-25Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incertaEncinas-Arzate,José JesúsMarquez-Ríos,EnriqueLópez-Elías,José AntonioTorres-Areola,WilfridoHuerta-Ocampo,José ÁngelRamírez-Suárez,Juan Carlos Navicula incerta stress response growth lipid production proximal composition nutrient limiting chlorophyll ABSTRACT Navicula incerta is a benthic diatom with potential use in nutrition and health for humans and aquaculture. Therefore, it is important to know its optimal growth conditions and biochemical composition. In this study, the effects of nitrate and silicate concentration on the growth kinetics and biochemical composition of N. incerta under laboratory conditions were measured. F/2 media was used as the control, and different concentrations of nitrogen (N/4, N/8 and N/16) and silicates (Si/4, Si/8 and Si/16) were evaluated. We measured cell concentration, chlorophyll-a and conducted proximal chemical analyses. It was found that different concentrations of nutrients affected the diatom's growth kinetics and affected the concentrations of ash, chlorophyll, protein, lipids and carbohydrates. The highest concentration of lipids was obtained in the limiting treatment of nitrogen N/8 (27.09%), while the lowest value was found with silicate Si/8 media (16.97%). Carbohydrates increased compared to the control, with the N/16 treatment presenting the maximal concentration (23.31%). Treatments with reduced nitrate (N/8 and N/16) demonstrated the lowest concentrations of protein (18.75 and 12.44%, respectively), while in reduced silicate treatments, no statistical differences (P ≥ 0.05) were observed. Therefore, media limited nitrogen and silicates affected the growth kinetics and proximal chemical composition of N. incerta. The growth of this species using the N/8 medium is a suitable method for increasing lipid concentration in N. incerta.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.48 n.2 20202020-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000200280en10.3856/vol48-issue2-fulltext-2314
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Navicula incerta stress response growth lipid production proximal composition nutrient limiting chlorophyll
spellingShingle	Navicula incerta stress response growth lipid production proximal composition nutrient limiting chlorophyll Encinas-Arzate,José Jesús Marquez-Ríos,Enrique López-Elías,José Antonio Torres-Areola,Wilfrido Huerta-Ocampo,José Ángel Ramírez-Suárez,Juan Carlos Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta
description	ABSTRACT Navicula incerta is a benthic diatom with potential use in nutrition and health for humans and aquaculture. Therefore, it is important to know its optimal growth conditions and biochemical composition. In this study, the effects of nitrate and silicate concentration on the growth kinetics and biochemical composition of N. incerta under laboratory conditions were measured. F/2 media was used as the control, and different concentrations of nitrogen (N/4, N/8 and N/16) and silicates (Si/4, Si/8 and Si/16) were evaluated. We measured cell concentration, chlorophyll-a and conducted proximal chemical analyses. It was found that different concentrations of nutrients affected the diatom's growth kinetics and affected the concentrations of ash, chlorophyll, protein, lipids and carbohydrates. The highest concentration of lipids was obtained in the limiting treatment of nitrogen N/8 (27.09%), while the lowest value was found with silicate Si/8 media (16.97%). Carbohydrates increased compared to the control, with the N/16 treatment presenting the maximal concentration (23.31%). Treatments with reduced nitrate (N/8 and N/16) demonstrated the lowest concentrations of protein (18.75 and 12.44%, respectively), while in reduced silicate treatments, no statistical differences (P ≥ 0.05) were observed. Therefore, media limited nitrogen and silicates affected the growth kinetics and proximal chemical composition of N. incerta. The growth of this species using the N/8 medium is a suitable method for increasing lipid concentration in N. incerta.
author	Encinas-Arzate,José Jesús Marquez-Ríos,Enrique López-Elías,José Antonio Torres-Areola,Wilfrido Huerta-Ocampo,José Ángel Ramírez-Suárez,Juan Carlos
author_facet	Encinas-Arzate,José Jesús Marquez-Ríos,Enrique López-Elías,José Antonio Torres-Areola,Wilfrido Huerta-Ocampo,José Ángel Ramírez-Suárez,Juan Carlos
author_sort	Encinas-Arzate,José Jesús
title	Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta
title_short	Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta
title_full	Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta
title_fullStr	Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta
title_full_unstemmed	Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta
title_sort	effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom navicula incerta
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000200280
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Effect of the deficiency of nitrate and silicate on the growth and composition of the benthic diatom Navicula incerta

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