2000
DOI: 10.4319/lo.2000.45.5.1067
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Iron limits the cell division rate of Prochlorococcus in the eastern equatorial Pacific

Abstract: Prochlorococcus, a small unicellular cyanobacterium, is an important member of the phytoplankton community in the eastern equatorial Pacific. When these waters were enriched with iron during IronEx II, the chlorophyll per cell and cell size of Prochlorococcus increased, implying that they were iron limited. The extent of this limitation was unclear, however, and the number of Prochlorococcus remained constant. To examine whether cell division rates were stimulated significantly by iron, we used a cell cycle an… Show more

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Cited by 120 publications
(91 citation statements)
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“…Heme oxygenase is transcribed during infection of Prochlorococcus strain NATL1A (Dammeyer et al, 2008), and its expression is upregulated under iron starvation in some cyanobacteria (Cornejo et al, 1998) but not in Prochlorococcus (Thompson et al, 2011a). Heme oxygenase overabundance at HOT could be related to relatively low iron availability in the Pacific, known to limit Prochlorococcus growth (Mann and Chisholm, 2000).…”
Section: Pho Box Motifs In Cultured Cyanomyovirus Genomesmentioning
confidence: 99%
“…Heme oxygenase is transcribed during infection of Prochlorococcus strain NATL1A (Dammeyer et al, 2008), and its expression is upregulated under iron starvation in some cyanobacteria (Cornejo et al, 1998) but not in Prochlorococcus (Thompson et al, 2011a). Heme oxygenase overabundance at HOT could be related to relatively low iron availability in the Pacific, known to limit Prochlorococcus growth (Mann and Chisholm, 2000).…”
Section: Pho Box Motifs In Cultured Cyanomyovirus Genomesmentioning
confidence: 99%
“…It is possible that addition of Fe resulted in the increased growth rate of Prochlorococcus as observed in the Eastern South Pacific (Mann and Chisholm, 2000). The higher sensitivity of the HLI ecotype in comparison to LL ecotypes to Fe availability (Thompson et al, 2011) may explain the increased cellular activity of Prochlorococcus eHLI in response to the Fe amendment.…”
Section: Relief From Fe Limitation In Oligotrophic Taxamentioning
confidence: 93%
“…We think not because SB and MIT0604-both narB-containing strains-grow at equal or better rates on ammonium compared with other HL adapted Prochlorococcus strains (Figure 1 and Supplementary Figure S1). An alternative explanation is that most of the early cultures of Prochlorococcus were isolated from environments that are relatively nitrogen replete-that is, thought to be more limited by phosphorus or iron availability (for example, the Sargasso Sea, Mediterranean Sea and the Equatorial Pacific) (Vaulot et al, 1996;Mann and Chisholm, 2000;Wu et al, 2000;Marty et al, 2002;Kettler et al, 2007;Rusch et al, 2010). We now know that Prochlorococcus cells capable of nitrate assimilation are more likely to be found in ocean regions with lower average nitrate concentrations, such as the Caribbean Sea and Indian Ocean (Martiny et al, 2009b).…”
Section: Resultsmentioning
confidence: 99%