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dc.creatorSrikanta Dani, K. G.
dc.creatorSilva Benavides, Ana Margarita
dc.creatorMichelozzi, Marco
dc.creatorPeluso, Gianfranco
dc.creatorTorzillo, Giuseppe
dc.creatorLoreto, Francesco
dc.date.accessioned2017-11-14T15:23:31Z
dc.date.available2017-11-14T15:23:31Z
dc.date.issued2017
dc.identifier.citationhttp://www.sciencedirect.com/science/article/pii/S0304420316302742?via%3Dihubes_ES
dc.identifier.issn0304-4203
dc.identifier.urihttp://hdl.handle.net/10669/73457
dc.description.abstractGlobal consensus estimates of marine isoprene emission (~ 1 TgC yr− 1) is significantly smaller than terrestrial isoprene emission (~ 500 TgC yr− 1), and the reasons are unclear. With the premise that isoprene emission is metabolically linked to photosynthesis in phytoplankton as in plants, we measured isoprene emission and photosynthesis to changing light levels in high-density cultures of two diatom species, Phaeodactylum tricornutum and Chaetoceros calcitrans. Isoprene emission increased and did not saturate with increasing light levels in C. calcitrans under laboratory conditions, whereas isoprene emission of P. tricornutum decreased at high-light levels with an associated increase in non-photochemical quenching. When tested for CO2 response, emission from P. tricornutum increased under low CO2 (similar to higher plants) but did not cease in absence of dissolved CO2, plausibly due to CO2 concentrating mechanisms. Isoprene emission under full-sun light in outdoor cultures of C. calcitrans (500 ± 200 fmol μg Chl− 1 h− 1) was significantly greater than maximum emission in laboratory cultures (100 ± 30 fmol μg Chl− 1 h− 1). We show that photosynthetic capacity of diatoms can be equal to or greater than that of higher plants. However, the carbon cost of isoprene emission in diatoms (≤ 0.0005% of photosynthesis) is significantly smaller than that in plants (0.9%). Based on these findings, we calculate that isoprene emission from diatoms alone can contribute ~ 4.8 TgC yr− 1 to the atmosphere, which is much greater than current modelled projections for annual isoprene emission from the entire marine ecosystem.es_ES
dc.description.sponsorshipConsiglio Nazionale delle Ricerche/[0006328]//Italiaes_ES
dc.description.sponsorshipConsiglio Nazionale delle Ricerche/[IBBR-006-2014-NA]//Italiaes_ES
dc.description.sponsorshipUnderstanding the Seventh Framework Programme/[ECLAIRE 282910]/FP7/Reino Unidoes_ES
dc.description.sponsorshipUnderstanding the Seventh Framework Programme/[KBBE 289582]/FP7/Europaes_ES
dc.language.isoen_USes_ES
dc.sourceQuímica Marina 189es_ES
dc.subjectChlorophyllses_ES
dc.subjectDiatomses_ES
dc.subjectLight responsees_ES
dc.subjectIsoprene emissiones_ES
dc.subjectNon-photochemical quenchinges_ES
dc.subjectPhotosynthesises_ES
dc.subjectPhytoplanktones_ES
dc.titleRelationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimateses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.identifier.doi10.1016/j.marchem.2016.12.005
dc.description.procedenceUCR::Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias del Mar y Limnología (CIMAR)es_ES


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