An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity
We have assessed how varying CO2 (180, 380, and 720 μatm) and growth light intensity (40 and 400 μmol photons m−2 s−1) affected Trichodesmium erythraeum IMS101 growth and photophysiology over free iron (Fe′) concentrations between 20 and 9,600 pM. We found significant iron dependencies of growth rat...
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ftdoajarticles:oai:doaj.org/article:46126457d1a74a18bfebc23ad12fede5 2023-05-15T17:51:26+02:00 An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity Tobias G. Boatman Kevin Oxborough Martha Gledhill Tracy Lawson Richard J. Geider 2018-04-01T00:00:00Z https://doi.org/10.3389/fmicb.2018.00624 https://doaj.org/article/46126457d1a74a18bfebc23ad12fede5 EN eng Frontiers Media S.A. http://journal.frontiersin.org/article/10.3389/fmicb.2018.00624/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2018.00624 https://doaj.org/article/46126457d1a74a18bfebc23ad12fede5 Frontiers in Microbiology, Vol 9 (2018) Trichodesmium erythraeum Cyanobacteria ocean acidification CO2 iron limitation light intensity Microbiology QR1-502 article 2018 ftdoajarticles https://doi.org/10.3389/fmicb.2018.00624 2022-12-31T05:10:46Z We have assessed how varying CO2 (180, 380, and 720 μatm) and growth light intensity (40 and 400 μmol photons m−2 s−1) affected Trichodesmium erythraeum IMS101 growth and photophysiology over free iron (Fe′) concentrations between 20 and 9,600 pM. We found significant iron dependencies of growth rate and the initial slope and maximal relative PSII electron transport rates (rPm). Under iron-limiting concentrations, high-light increased growth rates and rPm; possibly indicating a lower allocation of resources to iron-containing photosynthetic proteins. Higher CO2 increased growth rates across all iron concentrations, enabled growth to occur at lower Fe′ concentrations, increased rPm and lowered the iron half saturation constants for growth (Km). We attribute these CO2 responses to the operation of the CCM and the ATP spent/saved for CO2 uptake and transport at low and high CO2, respectively. It seems reasonable to conclude that T. erythraeum IMS101 can exhibit a high degree of phenotypic plasticity in response to CO2, light intensity and iron-limitation. These results are important given predictions of increased dissolved CO2 and water column stratification (i.e., higher light exposures) over the coming decades. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Microbiology 9 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Trichodesmium erythraeum Cyanobacteria ocean acidification CO2 iron limitation light intensity Microbiology QR1-502 |
spellingShingle |
Trichodesmium erythraeum Cyanobacteria ocean acidification CO2 iron limitation light intensity Microbiology QR1-502 Tobias G. Boatman Kevin Oxborough Martha Gledhill Tracy Lawson Richard J. Geider An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity |
topic_facet |
Trichodesmium erythraeum Cyanobacteria ocean acidification CO2 iron limitation light intensity Microbiology QR1-502 |
description |
We have assessed how varying CO2 (180, 380, and 720 μatm) and growth light intensity (40 and 400 μmol photons m−2 s−1) affected Trichodesmium erythraeum IMS101 growth and photophysiology over free iron (Fe′) concentrations between 20 and 9,600 pM. We found significant iron dependencies of growth rate and the initial slope and maximal relative PSII electron transport rates (rPm). Under iron-limiting concentrations, high-light increased growth rates and rPm; possibly indicating a lower allocation of resources to iron-containing photosynthetic proteins. Higher CO2 increased growth rates across all iron concentrations, enabled growth to occur at lower Fe′ concentrations, increased rPm and lowered the iron half saturation constants for growth (Km). We attribute these CO2 responses to the operation of the CCM and the ATP spent/saved for CO2 uptake and transport at low and high CO2, respectively. It seems reasonable to conclude that T. erythraeum IMS101 can exhibit a high degree of phenotypic plasticity in response to CO2, light intensity and iron-limitation. These results are important given predictions of increased dissolved CO2 and water column stratification (i.e., higher light exposures) over the coming decades. |
format |
Article in Journal/Newspaper |
author |
Tobias G. Boatman Kevin Oxborough Martha Gledhill Tracy Lawson Richard J. Geider |
author_facet |
Tobias G. Boatman Kevin Oxborough Martha Gledhill Tracy Lawson Richard J. Geider |
author_sort |
Tobias G. Boatman |
title |
An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity |
title_short |
An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity |
title_full |
An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity |
title_fullStr |
An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity |
title_full_unstemmed |
An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2, and Light Intensity |
title_sort |
integrated response of trichodesmium erythraeum ims101 growth and photo-physiology to iron, co2, and light intensity |
publisher |
Frontiers Media S.A. |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmicb.2018.00624 https://doaj.org/article/46126457d1a74a18bfebc23ad12fede5 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Microbiology, Vol 9 (2018) |
op_relation |
http://journal.frontiersin.org/article/10.3389/fmicb.2018.00624/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2018.00624 https://doaj.org/article/46126457d1a74a18bfebc23ad12fede5 |
op_doi |
https://doi.org/10.3389/fmicb.2018.00624 |
container_title |
Frontiers in Microbiology |
container_volume |
9 |
_version_ |
1766158569678307328 |