Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates

Global 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 measu...

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Detalhes bibliográficos
Autores: Srikanta Dani, K. G., Silva Benavides, Ana Margarita, Michelozzi, Marco, Peluso, Gianfranco, Torzillo, Giuseppe, Loreto, Francesco
Tipo de documento: artigo
Data de publicação:2017
País:Costa Rica
Recursos:Universidad de Costa Rica
Repositório:Kérwá
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/73457
Acesso em linha:http://www.sciencedirect.com/science/article/pii/S0304420316302742?via%3Dihub
https://hdl.handle.net/10669/73457
Access Level:Acesso embargado
Palavra-chave:Chlorophylls
Diatoms
Light response
Isoprene emission
Non-photochemical quenching
Photosynthesis
Phytoplankton
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dc.title.es_ES.fl_str_mv Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
title Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
spellingShingle Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
Srikanta Dani, K. G.
Chlorophylls
Diatoms
Light response
Isoprene emission
Non-photochemical quenching
Photosynthesis
Phytoplankton
title_short Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
title_full Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
title_fullStr Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
title_full_unstemmed Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
title_sort Relationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates
dc.creator.none.fl_str_mv Srikanta Dani, K. G.
Silva Benavides, Ana Margarita
Michelozzi, Marco
Peluso, Gianfranco
Torzillo, Giuseppe
Loreto, Francesco
author Srikanta Dani, K. G.
author_facet Srikanta Dani, K. G.
Silva Benavides, Ana Margarita
Michelozzi, Marco
Peluso, Gianfranco
Torzillo, Giuseppe
Loreto, Francesco
author_role author
author2 Silva Benavides, Ana Margarita
Michelozzi, Marco
Peluso, Gianfranco
Torzillo, Giuseppe
Loreto, Francesco
author2_role author
author
author
author
author
dc.subject.es_ES.fl_str_mv Chlorophylls
Diatoms
Light response
Isoprene emission
Non-photochemical quenching
Photosynthesis
Phytoplankton
topic Chlorophylls
Diatoms
Light response
Isoprene emission
Non-photochemical quenching
Photosynthesis
Phytoplankton
description Global 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.
publishDate 2017
dc.date.accessioned.none.fl_str_mv 2017-11-14T15:23:31Z
dc.date.available.none.fl_str_mv 2017-11-14T15:23:31Z
dc.date.issued.none.fl_str_mv 2017
dc.type.none.fl_str_mv artículo original
http://purl.org/coar/resource_type/c_2df8fbb1
info:eu-repo/semantics/article
format article
dc.identifier.citation.none.fl_str_mv http://www.sciencedirect.com/science/article/pii/S0304420316302742?via%3Dihub
dc.identifier.issn.none.fl_str_mv 0304-4203
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10669/73457
dc.identifier.doi.none.fl_str_mv 10.1016/j.marchem.2016.12.005
url http://www.sciencedirect.com/science/article/pii/S0304420316302742?via%3Dihub
https://hdl.handle.net/10669/73457
identifier_str_mv 0304-4203
10.1016/j.marchem.2016.12.005
dc.language.iso.es_ES.fl_str_mv en_US
language_invalid_str_mv en_US
dc.rights.none.fl_str_mv acceso embargado
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rights_invalid_str_mv acceso embargado
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eu_rights_str_mv embargoedAccess
dc.source.es_ES.fl_str_mv Química Marina 189
dc.source.none.fl_str_mv reponame:Kérwá
instname:Universidad de Costa Rica
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instname_str Universidad de Costa Rica
instacron_str UCR
institution UCR
reponame_str Kérwá
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spelling Srikanta Dani, K. G.d034c558-fa31-4d73-8c52-eacc2c664c5cSilva Benavides, Ana Margarita50380000-a61b-40c8-9344-87e295007a96600Michelozzi, Marcocfe067c4-fc9d-4dad-be4c-df8998a73488600Peluso, Gianfranco304726be-3a6e-45cf-8afc-c79d93edd723600Torzillo, Giuseppe58768475-c661-43ec-beaa-900eec979664600Loreto, Francesco2942ab96-e0bc-4c07-8fe6-d08ab8de36966002017-11-14T15:23:31Z2017-11-14T15:23:31Z2017http://www.sciencedirect.com/science/article/pii/S0304420316302742?via%3Dihub0304-4203https://hdl.handle.net/10669/7345710.1016/j.marchem.2016.12.005Global 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.Consiglio Nazionale delle Ricerche/[0006328]//ItaliaConsiglio Nazionale delle Ricerche/[IBBR-006-2014-NA]//ItaliaUnderstanding the Seventh Framework Programme/[ECLAIRE 282910]/FP7/Reino UnidoUnderstanding the Seventh Framework Programme/[KBBE 289582]/FP7/EuropaUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias del Mar y Limnología (CIMAR)en_USacceso embargadohttp://purl.org/coar/access_right/c_f1cfinfo:eu-repo/semantics/embargoedAccessQuímica Marina 189reponame:Kérwáinstname:Universidad de Costa Ricainstacron:UCRChlorophyllsDiatomsLight responseIsoprene emissionNon-photochemical quenchingPhotosynthesisPhytoplanktonRelationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimatesartículo originalhttp://purl.org/coar/resource_type/c_2df8fbb1info:eu-repo/semantics/articleORIGINALRelationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates.pdfRelationship between isoprene emission and photosynthesis in diatoms, and its implications for global marine isoprene estimates.pdfVersión finalapplication/pdf876091https://www.kerwa.ucr.ac.cr/bitstreams/bccc2cd4-01f3-413c-a73d-3663e8404daf/downloadad72daf0e62b55cce9dbe85049ccafefMD51LICENSElicense.txtlicense.txttext/plain; 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