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Quantum yield by the intertidal seagrass Zostera noltii

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dc.contributor.authorSilva, João
dc.contributor.authorBarrote, Isabel
dc.contributor.authorSantos, Rui
dc.contributor.editorCarlo, G. Di
dc.contributor.editorCalladine, A.
dc.contributor.editorZuljevic, A.
dc.date.accessioned2014-01-03T11:36:10Z
dc.date.available2014-01-03T11:36:10Z
dc.date.issued2009
dc.description.abstractThe maximum (Fv/FM) and the effective (F'v/F'm) quantum ise efficinecies of PSII were investigated in the intertidal seagrass Zostera noltii from Ria Formosa coastal lagoon (southern Portugal). Modulated chlorophyll fluorescence measurements were conducted monthly in both neap and spring tides over a yearly cycle. Other fluorescence parameters such as the Stern-Volmer non-photochemical quenching (NPQ) and the novel parameter LNP (which expresses the general decrease in PSII photochemical activity in the light) were derived from quantum use efficiency measurements. In all the samplings Fv/Fm presented a typical midday depression, which amplitude was higher during neap tides, when low tide occurs at noon and the plants are air-exposed. Annual patterns also emerged , revealing higher maximum quantum use efficiencies in winter and early spring, under mild temperatures and moderate irradiances. During summer months the maximum quantum use efficiency was at its lowest, most likely due to increased stress levels imposed by the combination of high temperature and strong irradiances. Relationships between quantum use efficiency (as revealed by chlorophyll fluorescence data) and critical environmental parameters (irradiance, temperature, air exposure) were explored through multifactorial analysis.por
dc.identifier.citationSilva J, Barrote I, Santos R (2009). Quantum use efficiency by the intertidal seagrass Zostera noltii. In Proceedings of the Mediterranean Seagrass Workshop 09, Hvar, Croatia (G Di Carlo, A Calladine and A Zuljevic eds). p.43por
dc.identifier.otherAUT: IBA00639; ROS00812;
dc.identifier.urihttp://hdl.handle.net/10400.1/3271
dc.language.isoengpor
dc.peerreviewedyespor
dc.subjectSeagrasspor
dc.subjectZostera noltiipor
dc.subjectQuantum use efficiencypor
dc.subjectChlorophyll fluorescencepor
dc.titleQuantum yield by the intertidal seagrass Zostera noltiipor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceHvar, Croatiapor
oaire.citation.endPage43por
oaire.citation.startPage43por
oaire.citation.titleMediterranean Seagrass Workshop 09por
person.familyNameSilva
person.familyNameBarrote
person.familyNameSantos
person.givenNameJoão
person.givenNameIsabel
person.givenNameRui
person.identifier82814
person.identifier42560
person.identifier.ciencia-id8216-527E-1BD4
person.identifier.ciencia-id801C-0AE4-B5CA
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-7211-1661
person.identifier.orcid0000-0002-0922-0259
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridJ-7874-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7403023547
person.identifier.scopus-author-id8659654200
person.identifier.scopus-author-id7201375018
rcaap.rightsrestrictedAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublication61040b53-b17a-40f6-b42e-f5476a7a6ddb
relation.isAuthorOfPublication8027b4d2-ee8d-4432-be75-7a2342a905a8
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscovery84487ca8-404a-4584-81f0-3662c340d712

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