Abstract
In this review we discuss how the photosynthetic apparatus, particularly Rubisco, acclimates to rising atmospheric CO2 concentrations (ca). Elevated ca alters the control exerted by different enzymes of the Calvin cycle on the overall rate of photosynthetic CO2 assimilation, so altering the requirement for different functional proteins. A decreased flux of carbon through the photorespiratory pathway will decrease requirements for these enzymes. From modeling of the response of CO2 uptake (A) to intracellular CO2 concentration (ci) it is shown that the requirement for Rubisco is decreased at elevated ca, whilst that for proteins limiting ribulose 1,5 bisphosphate regeneration may be increased. This balance may be altered by other interactions, in particular plasticity of sinks for photoassimilate and nitrogen supply; hypotheses on these interactions are presented. It is speculated that increased accumulation of carbohydrate in leaves developed at elevated ca may signal the 'down regulation' of Rubisco. The molecular basis of this 'down regulation' is discussed in terms of the repression of photosynthetic gene expression by the elevated carbohydrate concentrations. This molecular model is then used to predict patterns of acclimation of perennials to long term growth in elevated ca.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 413-425 |
| Number of pages | 13 |
| Journal | Photosynthesis research |
| Volume | 39 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1 1994 |
| Externally published | Yes |
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Keywords
- Rubisco
- elevated CO
- gene expression
- rbcL
- rbcS
ASJC Scopus subject areas
- Biochemistry
- Plant Science
- Cell Biology
Cite this
Acclimation of photosynthetic proteins to rising atmospheric CO2. / Webber, Andrew N.; Nie, Gui Ying; Long, Stephen P.
In: Photosynthesis research, Vol. 39, No. 3, 01.03.1994, p. 413-425.Research output: Contribution to journal › Review article
}
TY - JOUR
T1 - Acclimation of photosynthetic proteins to rising atmospheric CO2
AU - Webber, Andrew N.
AU - Nie, Gui Ying
AU - Long, Stephen P.
PY - 1994/3/1
Y1 - 1994/3/1
N2 - In this review we discuss how the photosynthetic apparatus, particularly Rubisco, acclimates to rising atmospheric CO2 concentrations (ca). Elevated ca alters the control exerted by different enzymes of the Calvin cycle on the overall rate of photosynthetic CO2 assimilation, so altering the requirement for different functional proteins. A decreased flux of carbon through the photorespiratory pathway will decrease requirements for these enzymes. From modeling of the response of CO2 uptake (A) to intracellular CO2 concentration (ci) it is shown that the requirement for Rubisco is decreased at elevated ca, whilst that for proteins limiting ribulose 1,5 bisphosphate regeneration may be increased. This balance may be altered by other interactions, in particular plasticity of sinks for photoassimilate and nitrogen supply; hypotheses on these interactions are presented. It is speculated that increased accumulation of carbohydrate in leaves developed at elevated ca may signal the 'down regulation' of Rubisco. The molecular basis of this 'down regulation' is discussed in terms of the repression of photosynthetic gene expression by the elevated carbohydrate concentrations. This molecular model is then used to predict patterns of acclimation of perennials to long term growth in elevated ca.
AB - In this review we discuss how the photosynthetic apparatus, particularly Rubisco, acclimates to rising atmospheric CO2 concentrations (ca). Elevated ca alters the control exerted by different enzymes of the Calvin cycle on the overall rate of photosynthetic CO2 assimilation, so altering the requirement for different functional proteins. A decreased flux of carbon through the photorespiratory pathway will decrease requirements for these enzymes. From modeling of the response of CO2 uptake (A) to intracellular CO2 concentration (ci) it is shown that the requirement for Rubisco is decreased at elevated ca, whilst that for proteins limiting ribulose 1,5 bisphosphate regeneration may be increased. This balance may be altered by other interactions, in particular plasticity of sinks for photoassimilate and nitrogen supply; hypotheses on these interactions are presented. It is speculated that increased accumulation of carbohydrate in leaves developed at elevated ca may signal the 'down regulation' of Rubisco. The molecular basis of this 'down regulation' is discussed in terms of the repression of photosynthetic gene expression by the elevated carbohydrate concentrations. This molecular model is then used to predict patterns of acclimation of perennials to long term growth in elevated ca.
KW - Rubisco
KW - elevated CO
KW - gene expression
KW - rbcL
KW - rbcS
UR - http://www.scopus.com/inward/record.url?scp=34249772297&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249772297&partnerID=8YFLogxK
U2 - 10.1007/BF00014595
DO - 10.1007/BF00014595
M3 - Review article
C2 - 24311133
AN - SCOPUS:34249772297
VL - 39
SP - 413
EP - 425
JO - Photosynthesis Research
JF - Photosynthesis Research
SN - 0166-8595
IS - 3
ER -