Manipulating antioxidant content in macroalgae in intensive land-based cultivation systems for functional food applications

Magnusson, Marie; Mata, Leónardo; Wang, Na; Zhao, Jian; Nys, Rocky de; Paul, Nicholas A.

doi:10.1016/j.algal.2015.02.007

Cited by 26 publications

(10 citation statements)

References 39 publications

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“…In fact, from the vast range of studies regarding the TPC of macroalgae extracts, there is a lack of consensus in what concerns the volume and concentration of extracts and reagents [28,55,65,128]. The incubation time has also been quite divergent, with some authors applying 20 [28] or 30 min [54,135] and others extending it up to 2 h [65,128].…”

Section: Global Analysis By Spectrophotometric Analysismentioning

confidence: 99%

“…Additionally, no consensus is found in the standard used for the calibration curves, which makes even more difficult the comparison between different studies. Most authors have expressed the TPC of macroalgae extracts as gallic acid [28,57,65,72,77,89,92,102,105,110,112,119,135] or phloroglucinol equivalents [104,136,137]. However, the use of other standards such as catechol [95,128] or tannic acid [54] has already been considered.…”

Section: Global Analysis By Spectrophotometric Analysismentioning

confidence: 99%

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The Quest for Phenolic Compounds from Macroalgae: A Review of Extraction and Identification Methodologies

et al. 2019

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The current interest of the scientific community for the exploitation of high-value compounds from macroalgae is related to the increasing knowledge of their biological activities and health benefits. Macroalgae phenolic compounds, particularly phlorotannins, have gained particular attention due to their specific bioactivities, including antioxidant, antiproliferative, or antidiabetic. Notwithstanding, the characterization of macroalgae phenolic compounds is a multi-step task, with high challenges associated with their isolation and characterization, due to the highly complex and polysaccharide-rich matrix of macroalgae. Therefore, this fraction is far from being fully explored. In fact, a critical revision of the extraction and characterization methodologies already used in the analysis of phenolic compounds from macroalgae is lacking in the literature, and it is of uttermost importance to compile validated methodologies and discourage misleading practices. The aim of this review is to discuss the state-of-the-art of phenolic compounds already identified in green, red, and brown macroalgae, reviewing their structural classification, as well as critically discussing extraction methodologies, chromatographic separation techniques, and the analytical strategies for their characterization, including information about structural identification techniques and key spectroscopic profiles. For the first time, mass spectrometry data of phlorotannins, a chemical family quite exclusive of macroalgae, is compiled and discussed.

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Section: Global Analysis By Spectrophotometric Analysismentioning

confidence: 99%

Section: Global Analysis By Spectrophotometric Analysismentioning

confidence: 99%

The Quest for Phenolic Compounds from Macroalgae: A Review of Extraction and Identification Methodologies

et al. 2019

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“…Light, temperature and nutrient availability are the main factors to be considered for the optimal growth of spirulina [5]. Many researchers studied the effects of manipulating growth conditions on the chemical composition of spirulina biomass in order to optimize the production of compounds with therapeutic and nutritional value [6,7]. Lack of essential nutrients, such as nitrogen, was employed to obtain lipids or carbohydrate-rich biomass [8,9].…”

Section: Introductionmentioning

confidence: 99%

Impact of Different Storage Methods on Bioactive Compounds in Arthrospira platensis Biomass

2019

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Arthrospira platensis (spirulina) is considered a source of natural molecules with nutritional and health benefits. As the different storage forms can affect the quantity and quality of bioactive ingredients, the aim of the present work was to evaluate the effects of freezing, oven-drying and freeze-drying on chemical composition of spirulina biomass. Total proteins, photosynthetic pigments and antioxidants, were analyzed and compared to respective quantities in fresh biomass. The frozen sample exhibited the highest content of phycocyanin-C, phenols, and ascorbic acid, also respect to the fresh biomass. The highest total flavonoid amount was in the freeze-dried biomass. HPLC-DAD analysis of phenolic acids revealed the presence of the isoflavone genistein, known for its therapeutic role, in all the spirulina samples. The phosphomolybdenum method (TAC) and DPPH scavenging activity were applied to determine the antioxidant activity of different samples. The highest DPPH scavenging activity was detected in fresh and freeze-dried biomass and it was positively related to carotenoid content. A positive correlation indicated that carotenoids, chlorophyll, ascorbic acid and all phenolic compounds were the major contributors to the TAC activity in spirulina biomass. The results highlighted a different functional value of spirulina biomass, depending on the processing methods used for its storage.

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“…Cheng et al 94 han informado que el anabolismo de los flavonoides puede estar estrechamente relacionado con el proceso fotosintético. Por este motivo, no son aconsejables las sobrepoblaciones de siembra, ya que cuando la densidad de cultivo se multiplica se genera mayor competencia por iluminación y ventilación entre la población 95 . Esto podría causar una disminución sustancial de producción.…”

Section: Contenido Fenólico Y Antioxidante En K Alvareziiunclassified

Estudio de la variabilidad en el tiempo y espacio de la actividad antioxidante y composición bioquímica de Kappaphycus alvarezii en diferentes densidades de siembra

Lema

Chóez-Guaranda

Ruíz-Barzola

et al. 2023

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Kappaphycus alvarezii es una de las especies de algas más cultivadas en el mundo, debido a su alto contenido de compuestos bioactivos con reportes antioxidantes y bioestimulantes. El presente estudio evaluó el efecto de las densidades de plantación sobre la composición bioquímica y antioxidante de K. alvarezii cultivada en un sistema de línea larga durante las estaciones seca y húmeda, con el fin de proporcionar una base científica para una cosecha óptima. Se midieron el contenido de humedad, cenizas, grasa, fibra, auxinas, fenoles, flavonoides, DPPH y ABTS. Los datos se analizaron mediante pruebas t, Wilcoxon, Kruskal-Wallis y ANOVA unidireccional. Los resultados mostraron un mayor contenido de grasa (2,01 % P.s), fibra bruta (5,21% P.s), contenido total de fenoles (324,09 μg GAE/g P.s) y ABTS (9,32 μg GAE/g P.s) durante la estación seca. Con respecto a la densidad de plantación, se produjo un aumento significativo del contenido en cenizas, fenoles totales y ABTS con una densidad de 10 líneas.célula-1 al mismo tiempo. Los contenidos de flavonoides, DPPH y auxina mostraron una tendencia estacional opuesta, alcanzando los niveles máximos en la estación húmeda. Este estudio aporta nueva información sobre las condiciones ambientales que pueden provocar cambios en la actividad antioxidante y la composición bioquímica de esta especie con vistas al desarrollo de bioproductos para diferentes sectores industriales como el alimentario, el farmacéutico y el de los fertilizantes en Ecuador. Palabras claves: Alga roja; Fenoles; Flavonoides; Antioxidante; Composición bioquímica; Variación estacional; densidad de siembra.

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Manipulating antioxidant content in macroalgae in intensive land-based cultivation systems for functional food applications

Cited by 26 publications

References 39 publications

The Quest for Phenolic Compounds from Macroalgae: A Review of Extraction and Identification Methodologies

The Quest for Phenolic Compounds from Macroalgae: A Review of Extraction and Identification Methodologies

Impact of Different Storage Methods on Bioactive Compounds in Arthrospira platensis Biomass

Estudio de la variabilidad en el tiempo y espacio de la actividad antioxidante y composición bioquímica de Kappaphycus alvarezii en diferentes densidades de siembra

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