Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis

Xiang Fu; Boping Han

doi:10.1007/s00343-010-9046-x

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Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis

Updated：2023-05-16

- Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis
- Journal of Oceanology and Limnology Vol. 28, Issue 3, Pages: 478-488(2010)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Graduate University Chinese Academy of Sciences
  3. The Second Institute of Oceanography SOA
- Author bio：
- Funds：
- DOI：10.1007/s00343-010-9046-x
  CLC：
- Online First：20 May 2010，
  
  Published：2010
- Accepted：
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Fu, X., Han, B. Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis., Chin. J. Ocean. Limnol. 28, 478–488 (2010). https://doi.org/10.1007/s00343-010-9046-x
DOI：

Fu, X., Han, B. Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis., Chin. J. Ocean. Limnol. 28, 478–488 (2010). https://doi.org/10.1007/s00343-010-9046-x DOI：

摘要

Abstract

Cyanobacteria possess a delicate system known as the carbon concentrating mechanism (CCM)

which can efficiently elevate the intracellular inorganic carbon (Ci) concentration via active transportation. The system requires energy supplied by photosystems; therefore

the activity of the Ci transporter is closely related to light intensity. However

the relationship between CCM and light intensity has rarely been evaluated. Here

we present an improved quantitative model of CCM in which light is incorporated

and developed a CCM model that modified after Fridlyand et a1. in 1996. Some equations used in this model were inducted to describe the relationship between transport capacity and light intensity

by which the response of the CCM to light change is simulated. Our results indicate that the efficiency of the carbon concentrating system is sensitive to light intensity. When the external Ci concentration was low

CO2 uptake dominated the total Ci uptake with increasing light intensity

while under high external Ci concentrations HCO 3 − uptake primarily contributed to the total Ci uptake. Variations in the ratio of energy allocated between the transport systems could markedly affect the operation of CCM. Indeed

our simulations suggest that various combinations of Ci fluxes can provide a possible approach to detect the way by which the cell distributes energy produced by the photosystems to the two active Ci transport processes. The proportion of the energy consumed on CCM to the total energy expenditure for the fixation of one CO2 molecule was determined at 18%–40%.

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references

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