An Integrated Response of Trichodesmium erythraeum IMS101 Growth and Photo-Physiology to Iron, CO2 , and Light Intensity

Frontiers in Microbiology
Tobias G BoatmanRichard J Geider

Abstract

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.

References

Nov 1, 1996·The Journal of Biological Chemistry·I YruelaR Picorel
Apr 27, 1999·Trends in Biochemical Sciences·V Braun, H Killmann
Oct 12, 2001·Nature·T S BibbyJ Barber
Oct 30, 2004·Biochimica Et Biophysica Acta·Jean-Charles CadoretAnne-Lise Etienne
Feb 8, 2005·Biochimica Et Biophysica Acta·Janne A IhalainenJan P Dekker
May 24, 2005·Plant Physiology·Sarah JoshuaConrad W Mullineaux
Jun 25, 2005·Photosynthesis Research·Alexander N Melkozernov, Robert E Blankenship
Dec 8, 2006·Nature·Scott C Doney
Mar 11, 2009·Proceedings of the National Academy of Sciences of the United States of America·Adina PaytanAnton F Post
Aug 28, 2009·Environmental Microbiology·P Dreux Chappell, Eric A Webb
Jan 16, 2010·Science·Dalin ShiFrançois M M Morel
Jan 21, 2011·Proceedings of the National Academy of Sciences of the United States of America·Mak A SaitoJohn B Waterbury
Jun 23, 2012·Frontiers in Microbiology·Peter L Croot, Maija I Heller
Oct 17, 2012·Proceedings of the National Academy of Sciences of the United States of America·Dalin ShiFrançois M M Morel
Oct 27, 2016·Nature Microbiology·Clara Martínez-PérezMarcel M M Kuypers

❮ Previous
Next ❯

Software Mentioned

CO2SYS
MINTEQ

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.