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Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance

2009Journal article Open access
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dc.contributor.authorFigueroa, Felix L.
dc.contributor.authorMartinez, Brezo
dc.contributor.authorIsrael, Alvaro
dc.contributor.authorNeori, Amir
dc.contributor.authorMalta, Erik-jan
dc.contributor.authorAng, Put, Jr.
dc.contributor.authorInken, Sven
dc.contributor.authorMarquardt, Ronny
dc.contributor.authorRachamim, Tamar
dc.contributor.authorArazi, Uri
dc.contributor.authorFrenk, Sammy
dc.contributor.authorKorbee, Nathalie
dc.date.accessioned2018-12-07T14:58:34Z
dc.date.available2018-12-07T14:58:34Z
dc.date.issued2009
dc.description.abstractThallus absorptance, daily courses of maximal quantum yields of chlorophyll fluorescence of photosystem II (F-v/F-m) and electron transport rates (ETR) were determined in 3 macroalgae (Hypnea spinella, Rhodophyta; Sargassum vulgare, Phaeophyta; and Ulva lactuca, Chlorophyta) collected from a low nutrient supply (LNS) ecosystem (Red Sea, Gulf of Aqaba, Eilat, Israel). In addition, U. lactuca grown previously in high nutrient supply (HNS) fishpond effluents was used to evaluate the effect of nutrient enrichment on photosynthesis. Short-term (2 d) and mid-term (5 d) effects of both photosynthetically active radiation (PAR) and full solar irradiance (PAB: PAR+UVA+UVB) at 3 solar irradiance treatments (no neutral filters, no NF; 2 neutral filter layers, 2NF; and 4 neutral filter layers, 4NF simulating levels of irradiance at 5, 10 and 20 m depth respectively) were evaluated in algae incubated with running seawater. Significant effects of time (variation throughout the day) and irradiance (number of neutral filters) on both F-v/F-m and ETR were observed. Photoinhibition occurred at noon under the no NF (up to 40% decrease) and 2NF (up to 30% decrease) treatments; however, full recovery in all treatments was reached in the afternoon (dynamic photoinhibition) except in H. spinella. The highest maximum ETR was observed in the no NF treatment despite its strongest photoinhibitory effect. The decrease in F-v/F-m at noon was similar to or higher under the PAB than under the PAR treatment alone, depending on the species. Photoinhibition was lower and the maximum ETR was higher in HNS than in LNS U. lactuca, indicating positive effects of nutrient supply on both photosynthesis and photoprotection. The maximum ETRs exhibited by different algae may be related to their zonation in the field and the resulting energy supply.
dc.description.sponsorshipCGL2007-66095/BOS; CGL2008 05407-C03-01; AGL2005-02655
dc.identifier.doi10.3354/ab00186
dc.identifier.issn1864-7790
dc.identifier.issn1864-7782
dc.identifier.urihttp://hdl.handle.net/10400.1/12098
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInter-Research
dc.subjectModulated pam fluorometry
dc.subjectUv-B radiation
dc.subjectChlorophyll fluorescence
dc.subjectBiooptical properties
dc.subjectMarine macrophytes
dc.subjectElectron-transport
dc.subjectDepth distribution
dc.subjectCoral-reefs
dc.subjectLight
dc.subjectPhotoinhibition
dc.titleAcclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceIntuniv Inst Marine Sci, Eilat, ISRAEL
oaire.citation.endPage172
oaire.citation.issue01-fev
oaire.citation.startPage159
oaire.citation.titleAquatic Biology
oaire.citation.title8Th International Workshop of the Group for Aquatic Primary Productivity/ Seminar on Gross and Net Primary Productivity
oaire.citation.volume7
person.familyNameMalta
person.givenNameErik-jan
person.identifier.orcid0000-0002-3934-3807
person.identifier.ridF-2485-2014
person.identifier.scopus-author-id7003607705
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication92920db9-fc6b-48cc-962e-4e5ee8441cd7
relation.isAuthorOfPublication.latestForDiscovery92920db9-fc6b-48cc-962e-4e5ee8441cd7

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