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dc.contributor.authorIhnken, Svenes_ES
dc.contributor.authorNavarro, Enriquees_ES
dc.date.accessioned2016-02-05T09:50:37Z-
dc.date.available2016-02-05T09:50:37Z-
dc.date.issued2014-11-20-
dc.identifier.citationAquatic Biology 22: 95-110 (2014)es_ES
dc.identifier.issn1864-7782-
dc.identifier.urihttp://hdl.handle.net/10261/128762-
dc.description16 páginas.- Sven Ihnken... et al.es_ES
dc.description.abstractChlorella spp. are robust chlorophyte microalgal species frequently used in mass culture. The pH optimum for growth is close to neutrality; at this pH, theoretically little energy is required to maintain homeostasis. In the present study, we grew Chlorella fusca cells in an open, outdoor, thin-layer cascade photobioreactor (TLC), under ambient photon flux at the theoretically preferred pH (7.2), and let the culture pass the exponential growth phase. Using pH drift experiments, we show that an alkalization to pH 9 supported photosynthesis in the TLC. The increased photosynthetic activity under alkaline conditions was a pH-dependent effect, and not a dissolved inorganic carbon (DIC) concentration- or light intensity-dependent effect. Re-acidification (in one step or in increments) lowered gross oxygen production and increased non-photochemical quenching in short-term experiments. Gross oxygen production and electron transport rates in PSII were uncoupled during the pH perturbation experiments. Electron transport rates were only marginally affected by pH, whereas oxygen production rates decreased with acidification. Alternative electron pathways, electron donation at the plastid terminal oxidase and state-transitions are discussed as a potential explanation. Because cell material from the TLC was not operating at maximal capacity, we propose that alkalization can support photosynthesis in challenged TLC systems.es_ES
dc.description.sponsorshipThe authors express their special gratitude to the local coordinators of the bio-technology workgroup, Irene Malpartida and Roberto Abdala. Special thanks to the Spanish GAP coordinators Félix L. Figueroa and Jesús Mercado, and the Spanish GAP committee María Segovia, Nathalie Korbee, Roberto Abdala, Rafael Conde, Francisca de la Coba, Andreas Reul and Irene Malpartida. Experiments were carried out under support from the Department of Ecology of the Universidad de Málaga. The Netherlands Institute for Sea Research (NIOZ) provided acknowledged travel funds for J.C.K. and S.I. Three anonymous reviewers contributed through constructive criticism.es_ES
dc.language.isoenges_ES
dc.publisherInter Researches_ES
dc.relation.isversionofPublisher's versiones_ES
dc.rightsopenAccesses_ES
dc.subjectChlorellaes_ES
dc.subjectMass culturees_ES
dc.subjectpH perturbancees_ES
dc.subjectChlorophyll fluorescencees_ES
dc.subjectOxygen productiones_ES
dc.subjectpH driftes_ES
dc.subjectPhotosynthesises_ES
dc.subjectPhotoprotectiones_ES
dc.titleLight acclimation and pH perturbations affect photosynthetic performance in Chlorella mass culturees_ES
dc.typeartículoes_ES
dc.identifier.doi10.3354/ab00586-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.palaeo.2015.06.030es_ES
dc.identifier.e-issn1864-7790-
dc.contributor.funderUniversidad de Málagaes_ES
dc.contributor.funderRoyal Netherlands Institute for Sea Researches_ES
dc.relation.csicSíes_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/100009473es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.grantfulltextopen-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.languageiso639-1en-
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