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Effect of temperature on growth, photosynthesis and biochemical composition of Nannochloropsis oceanica, grown outdoors in tubular photobioreactors

2020-08Journal article Open access
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dc.contributor.authorCarneiro, M.
dc.contributor.authorCicchi, B.
dc.contributor.authorMaia, I. B.
dc.contributor.authorPereira, H.
dc.contributor.authorZittelli, G. Chini
dc.contributor.authorVarela, João
dc.contributor.authorXavier Malcata, F.
dc.contributor.authorTorzillo, G.
dc.date.accessioned2021-06-24T11:35:23Z
dc.date.available2022-08-01T00:30:13Z
dc.date.issued2020-08
dc.description.abstractSince temperature is an important factor affecting microalgal growth, photosynthetic rate and biomass composition, this study has accordingly focused on its effects on biomass yield and nighttime biomass loss, as well as photochemical changes, using Nannochloropsis oceanica as model species, grown in two outdoor 50-L tubular photobioreactors (PBR). In two independent trials, cultures were subjected to a diurnal light:dark cycle, under a constant temperature of 28 degrees C and, on the second trial, at 18 degrees C. Changes in culture performance were assessed by measuring growth, lipid and fatty acid composition of the biomass in both morning and evening. Our results revealed that N. oceanica shows a wide temperature tolerance with relevant nighttime biomass loss, that decreased at lower temperatures, at the expenses of its daily productivity. Fluorescence measurements revealed reversible damage to photosystem II in cells growing in the PBR under optimal thermal conditions, whereas microalgae grown at suboptimal ones exhibited an overall lower photosynthetic activity. Lipids were partially consumed overnight to support cell division and provide maintenance energy. Eicosapentaenoic acid (EPA) catabolism reached a maximum after the dark period, as opposed to their saturated counterparts; whereas lower temperatures led to higher EPA content which reached the maximum in the morning. These findings are relevant for the production of Nannochloropsis at industrial scale.
dc.description.sponsorshipEuropean Cooperation in Science and Technology (COST) Action: European network for algal-bio-products (EUALGAE) [ES1408]
dc.description.sponsorshipPortuguese national funds from the Foundation for Science and Technology (FCT) [SFRH/BD/129952/2017]
dc.description.sponsorshipLaboratory for Process Engineering, Environment, Biotechnology and Energy -LEPABE -by the FCT/MCTES (PIDDAC) [UIDB/00511/2020]
dc.description.sponsorshipproject: "LEPABE-2-ECO-INNOVATION" - North Portugal Regional Operational Program (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF) [NORTE-01-0145-FEDER-000005]
dc.description.sponsorshipproject: "DINOSSAUR" - ERDF through Programa Operacional Competitividade e Internacionalizacao (COMPETE2020) [PTDC/BBB-EBB/1374/2014-POCI-01-0145-FEDER-016640]
dc.description.sponsorshipproject: "SABANA"- European Union [727874]
dc.description.sponsorship[UID/Multi/04326/2019]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.algal.2020.101923
dc.identifier.issn2211-9264
dc.identifier.urihttp://hdl.handle.net/10400.1/16425
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectNannochloropsis
dc.subjectTemperature
dc.subjectPhotosynthesis
dc.subjectRespiration
dc.subjectNight biomass loss
dc.subjectChlorophyll fluorescence
dc.subject.otherBiotechnology & applied microbiology
dc.titleEffect of temperature on growth, photosynthesis and biochemical composition of Nannochloropsis oceanica, grown outdoors in tubular photobioreactors
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_NORTE/67418/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157419/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/154715/PT
oaire.citation.startPage101923
oaire.citation.titleAlgal Research-Biomass Biofuels and Bioproducts
oaire.citation.volume49
oaire.fundingStreamPOR_NORTE
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameVarela
person.givenNameJoão
person.identifier.orcid0000-0003-3101-693X
person.identifier.ridM-4223-2013
person.identifier.scopus-author-id55741416000
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticle
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relation.isAuthorOfPublication.latestForDiscoveryd339a9e7-bc32-49c4-ba48-a17343d40092
relation.isProjectOfPublication55c6db64-4a00-4a74-8af5-357cb6e682f9
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