Combined effects of CO2 and light on the N2-fixing cyanobacterium Trichodesmium IMS101: physiological responses.

Plant Physiology
Sven A KranzBjörn Rost

Abstract

Recent studies on the diazotrophic cyanobacterium Trichodesmium erythraeum (IMS101) showed that increasing CO(2) partial pressure (pCO(2)) enhances N(2) fixation and growth. Significant uncertainties remain as to the degree of the sensitivity to pCO(2), its modification by other environmental factors, and underlying processes causing these responses. To address these questions, we examined the responses of Trichodesmium IMS101 grown under a matrix of low and high levels of pCO(2) (150 and 900 microatm) and irradiance (50 and 200 micromol photons m(-2) s(-1)). Growth rates as well as cellular carbon and nitrogen contents increased with increasing pCO(2) and light levels in the cultures. The pCO(2)-dependent stimulation in organic carbon and nitrogen production was highest under low light. High pCO(2) stimulated rates of N(2) fixation and prolonged the duration, while high light affected maximum rates only. Gross photosynthesis increased with light but did not change with pCO(2). HCO(3)(-) was identified as the predominant carbon source taken up in all treatments. Inorganic carbon uptake increased with light, but only gross CO(2) uptake was enhanced under high pCO(2). A comparison between carbon fluxes in vivo and those derived f...Continue Reading

References

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Citations

Dec 31, 2010·Photosynthesis Research·Sven A KranzBjörn Rost
Feb 18, 2011·Photosynthesis Research·John A RavenStephen C Maberly
Oct 17, 2012·Proceedings of the National Academy of Sciences of the United States of America·Dalin ShiFrançois M M Morel
Jun 19, 2013·PloS One·Dedmer B Van de WaalBjörn Rost
Feb 16, 2016·Scientific Reports·Feng-Jiao LiuXu-Guang Huang
Oct 16, 2015·Journal of Experimental Botany·John A Raven, John Beardall
Jan 24, 2014·Evolutionary Applications·Sinéad CollinsTatiana A Rynearson
Aug 30, 2012·FEMS Microbiology Reviews·Birgitta BergmanEdward J Carpenter
Nov 28, 2014·Journal of Experimental Botany·Meri EichnerBjörn Rost
Aug 26, 2014·Annual Review of Marine Science·Kimberly H Halsey, Bethan M Jones
Nov 11, 2016·Proceedings of the National Academy of Sciences of the United States of America·Nathan G WalworthEric A Webb
Apr 12, 2018·PloS One·Tobias G BoatmanRichard J Geider
Apr 17, 2018·Journal of Experimental Botany·Tobias G BoatmanRichard J Geider
Nov 29, 2017·Applied and Environmental Microbiology·Nathan G WalworthDavid A Hutchins
Nov 1, 2018·Journal of Experimental Botany·Tobias G BoatmanRichard J Geider
Jun 17, 2011·Nature Reviews. Microbiology·Jill A SohmDouglas G Capone
Jul 11, 2014·Environmental Microbiology·Dina SpunginOrly Levitan
Jul 30, 2019·Frontiers in Microbiology·Meri EichnerYeala Shaked
May 26, 2017·Nature Microbiology·David A Hutchins, Feixue Fu
Mar 3, 2020·Frontiers in Bioengineering and Biotechnology·Chinnathambi VeluKirsten Heimann
Oct 14, 2020·Environmental Microbiology·Margaret A Knight, J Jeffrey Morris
Jul 7, 2021·Environmental Microbiology·Mary R GradovilleJonathan P Zehr

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