Effect of Deployment and Harvest Date on Growth and High-Value Compounds of Farmed Alaria esculenta

Silvia Blanco Gonzalez; Maria Sapatinha; Mick Mackey; Julie Maguire; Simona Paolacci; Susana Goncalves; Helena Maria Lourenco; Rogerio Mendes; Narcisa Maria Bandarra; Carla Pires

doi:10.3390/md21050305

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Effect of Deployment and Harvest Date on Growth and High-Value Compounds of Farmed Alaria esculenta

Journal article

Open access

Peer reviewed

Effect of Deployment and Harvest Date on Growth and High-Value Compounds of Farmed Alaria esculenta

Silvia Blanco Gonzalez, Maria Sapatinha, Mick Mackey, Julie Maguire, Simona Paolacci, Susana Goncalves, Helena Maria Lourenco, Rogerio Mendes, Narcisa Maria Bandarra and Carla Pires

Marine Drugs, Vol.21(5), pp.1-20

2023

DOI: https://doi.org/10.3390/md21050305

PMCID: PMC10220681

PMID: 37233499

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Abstract

brown seaweed

bioactive compounds

phenolic compounds

nutraceuticals

Alaria esculenta is a brown seaweed farmed in many European countries for its biomass rich in useful bio compounds. This study aimed to identify the optimal growing season to maximise biomass production and quality. The seeded longlines of the brown seaweed were deployed in the southwest of Ireland in October and November 2019 and samples of the biomass were harvested in different dates, between March and June 2020. Biomass gain and composition, phenolic and flavonoid content (TPC and TFC) and biological activities (antioxidant and anti-hypertensive activities) of seaweed extracts prepared with Alcalase were evaluated. The biomass production was significantly higher for the line deployed in October (>20 kg & BULL;m(-1)). In May and June, an increasing amount of epiphytes was observed on the surface of A. esculenta. The protein content of A. esculenta varied between 11.2 and 11.76% and fat content was relatively low (1.8-2.3%). Regarding the fatty acids profile, A. esculenta was rich in polyunsaturated fatty acids (PUFA), especially in eicosapentaenoic acid (EPA). The samples analysed were very rich in Na, K, Mg, Fe, Mn, Cr and Ni. The content of Cd, Pb Hg was relatively low and below the maximum levels allowed. The highest TPC and TFC were obtained in extracts prepared with A. esculenta collected in March and levels of these compounds decreased with time. In general, the highest radical scavenging activities (ABTS and DPPH), as well as chelating activities (Fe2+ and Cu2+) were observed in early spring. Extracts from A. esculenta collected in March and April presented higher ACE inhibitory activity. The extracts from seaweeds harvested in March exhibited higher biological activity. It was concluded that an earlier deployment allows for maximising growth and harvest of biomass earlier when its quality is at the highest levels. The study also confirms the high content of useful bio compounds that can be extracted from A. esculenta and used in the nutraceutical and pharmaceutical industry.

Details

Title: Effect of Deployment and Harvest Date on Growth and High-Value Compounds of Farmed Alaria esculenta
Authors: Silvia Blanco Gonzalez (Corresponding Author) - Bantry Marine Research Station (Ireland)
Maria Sapatinha - Portuguese Sea and Atmosphere Institute
Mick Mackey - Daithi O’Murchu Marine Research Station
Julie Maguire - Daithi O’Murchu Marine Research Station
Simona Paolacci - Daithi O’Murchu Marine Research Station
Susana Goncalves - Portuguese Sea and Atmosphere Institute
Helena Maria Lourenco - Centro Interdisciplinar de Investigação Marinha e Ambiental
Rogerio Mendes - Centro Interdisciplinar de Investigação Marinha e Ambiental
Narcisa Maria Bandarra - Centro Interdisciplinar de Investigação Marinha e Ambiental
Carla Pires - Centro Interdisciplinar de Investigação Marinha e Ambiental
Publication details: Marine Drugs, Vol.21(5), pp.1-20
Publisher: MDPI AG
Date published: 2023
DOI: 10.3390/md21050305
ISSN: 1660-3397
PMID: 37233499; PMC10220681
Copyright note: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Data Availability: The datasets generated for this study are available on request to the corresponding author.
Grant note: SEAFOOD_AGE—“Smart and eco-innovative SEAFOOD processes and products for healthy AGEing”, grant number EAPA_758/2018.
Organisation Unit: School of Science, Technology and Engineering; Student Services and Engagement
Language: English
Record Identifier: 991183545902621
Output Type: Journal article

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Collaboration types: International collaboration
Web Of Science research areas: Chemistry, Medicinal; Pharmacology & Pharmacy

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