Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean
The cyanobacterial iron-stress-inducible isiA gene encodes a chlorophyll-binding protein that provides flexibility in photosynthetic strategy enabling cells to acclimate to low iron availability. Here, we report on the diversity and abundance of isiA genes from 14 oceanic stations encompassing large...
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ftsouthampton:oai:eprints.soton.ac.uk:430824 2023-08-27T04:10:56+02:00 Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean Li, Qian Huisman, J. Bibby, Thomas Jiao, Nianzhi 2019-04-04 text https://eprints.soton.ac.uk/430824/ https://eprints.soton.ac.uk/430824/1/fmicb_10_00650.pdf en English eng https://eprints.soton.ac.uk/430824/1/fmicb_10_00650.pdf Li, Qian, Huisman, J., Bibby, Thomas and Jiao, Nianzhi (2019) Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean. Frontiers in Microbiology, 10 (650), 1-12. (doi:10.3389/fmicb.2019.00650 <http://dx.doi.org/10.3389/fmicb.2019.00650>). cc_by_4 Article PeerReviewed 2019 ftsouthampton https://doi.org/10.3389/fmicb.2019.00650 2023-08-03T22:23:52Z The cyanobacterial iron-stress-inducible isiA gene encodes a chlorophyll-binding protein that provides flexibility in photosynthetic strategy enabling cells to acclimate to low iron availability. Here, we report on the diversity and abundance of isiA genes from 14 oceanic stations encompassing large natural gradients in iron availability. Synechococcus CRD1 and CRD2-like isiA genes were ubiquitously identified from tropical and subtropical waters of the Pacific, Atlantic, and Indian Oceans. The relative abundance of isiA-containing Synechococcus cells ranged from less than 10% of the total Synechococcus population in regions where iron is replete such as the North Atlantic subtropical gyre, to over 80% in low-iron but high-nitrate regions of the eastern equatorial Pacific. Interestingly, Synechococcus populations in regions with both low iron and low nitrate concentrations such as the subtropical gyres in the North Pacific and South Atlantic had a low relative abundance of the isiA gene. Indeed, fitting our data into a multiple regression model showed that ∼80% of the variation in isiA relative abundances can be explained by nitrate and iron concentrations, whereas no other environmental variables (temperature, salinity, Chl a) had a significant effect. Hence, isiA has a predictable biogeographical distribution, consistent with the perceived biological role of IsiA as an adaptation to low-iron conditions. Understanding such photosynthetic strategies is critical to our ability to accurately estimate primary production and map nutrient limitation on global scales Article in Journal/Newspaper North Atlantic University of Southampton: e-Prints Soton Indian Pacific Frontiers in Microbiology 10 |
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University of Southampton: e-Prints Soton |
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ftsouthampton |
language |
English |
description |
The cyanobacterial iron-stress-inducible isiA gene encodes a chlorophyll-binding protein that provides flexibility in photosynthetic strategy enabling cells to acclimate to low iron availability. Here, we report on the diversity and abundance of isiA genes from 14 oceanic stations encompassing large natural gradients in iron availability. Synechococcus CRD1 and CRD2-like isiA genes were ubiquitously identified from tropical and subtropical waters of the Pacific, Atlantic, and Indian Oceans. The relative abundance of isiA-containing Synechococcus cells ranged from less than 10% of the total Synechococcus population in regions where iron is replete such as the North Atlantic subtropical gyre, to over 80% in low-iron but high-nitrate regions of the eastern equatorial Pacific. Interestingly, Synechococcus populations in regions with both low iron and low nitrate concentrations such as the subtropical gyres in the North Pacific and South Atlantic had a low relative abundance of the isiA gene. Indeed, fitting our data into a multiple regression model showed that ∼80% of the variation in isiA relative abundances can be explained by nitrate and iron concentrations, whereas no other environmental variables (temperature, salinity, Chl a) had a significant effect. Hence, isiA has a predictable biogeographical distribution, consistent with the perceived biological role of IsiA as an adaptation to low-iron conditions. Understanding such photosynthetic strategies is critical to our ability to accurately estimate primary production and map nutrient limitation on global scales |
format |
Article in Journal/Newspaper |
author |
Li, Qian Huisman, J. Bibby, Thomas Jiao, Nianzhi |
spellingShingle |
Li, Qian Huisman, J. Bibby, Thomas Jiao, Nianzhi Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean |
author_facet |
Li, Qian Huisman, J. Bibby, Thomas Jiao, Nianzhi |
author_sort |
Li, Qian |
title |
Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean |
title_short |
Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean |
title_full |
Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean |
title_fullStr |
Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean |
title_full_unstemmed |
Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean |
title_sort |
biogeography of cyanobacterial isia genes and their link to iron availability in the ocean |
publishDate |
2019 |
url |
https://eprints.soton.ac.uk/430824/ https://eprints.soton.ac.uk/430824/1/fmicb_10_00650.pdf |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://eprints.soton.ac.uk/430824/1/fmicb_10_00650.pdf Li, Qian, Huisman, J., Bibby, Thomas and Jiao, Nianzhi (2019) Biogeography of cyanobacterial isiA Genes and their link to iron availability in the ocean. Frontiers in Microbiology, 10 (650), 1-12. (doi:10.3389/fmicb.2019.00650 <http://dx.doi.org/10.3389/fmicb.2019.00650>). |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.3389/fmicb.2019.00650 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
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1775353329182834688 |