PMID- 17087468
OWN - NLM
STAT- MEDLINE
DCOM- 20061205
LR  - 20191110
IS  - 0140-7791 (Print)
IS  - 0140-7791 (Linking)
VI  - 29
IP  - 5
DP  - 2006 May
TI  - Interactions between the effects of atmospheric CO2 content and P nutrition on 
      photosynthesis in white lupin (Lupinus albus L.).
PG  - 844-53
AB  - Phosphorus (P) is a major factor limiting the response of carbon acquisition of 
      plants and ecosystems to increasing atmospheric CO2 content. An important 
      consideration, however, is the effect of P deficiency at the low atmospheric CO2 
      content common in recent geological history, because plants adapted to these 
      conditions may also be limited in their ability to respond to further increases 
      in CO2 content. To ascertain the effects of low P on various components of 
      photosynthesis, white lupin (Lupinus albus L.) was grown hydroponically at 200, 
      400 and 750 micromol mol(-1) CO2, under sufficient and deficient P supply (250 
      and 0.69 microM P, respectively). Increasing growth CO2 content increased 
      photosynthesis only under sufficient growth P. Ribulose 1,5-biphosphate 
      carboxylase/oxygenase (Rubisco) content and activation state were not reduced to 
      the same degree as the net CO2 assimilation rate (A), and the in vivo rate of 
      electron transport was sufficient to support photosynthesis in all cases. The 
      rate of triose phosphate use did not appear limiting either, because all the 
      treatments continued to respond positively to a drop in oxygen levels. We 
      conclude that, at ambient and elevated CO2 content, photosynthesis in low-P 
      plants appears limited by the rate of ribulose biphosphate (RuBP) regeneration, 
      probably through inhibition of the Calvin cycle. This failure of P-deficient 
      plants to respond to rising CO2 content above 200 micromol mol(-1) indicates that 
      P status already imposes a widespread restriction in plant responses to increases 
      in CO2 content from the pre-industrial level to current values.
FAU - Campbell, Catherine D
AU  - Campbell CD
AD  - Department of Botany, University of Toronto, 25 Willcocks Street, Toronto ON M5S 
      3B2, Canada. cc29@york.ac.uk
FAU - Sage, Rowan E
AU  - Sage RE
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Plant Cell Environ
JT  - Plant, cell & environment
JID - 9309004
RN  - 142M471B3J (Carbon Dioxide)
RN  - 27YLU75U4W (Phosphorus)
RN  - EC 4.1.1.39 (Ribulose-Bisphosphate Carboxylase)
SB  - IM
MH  - Atmosphere
MH  - Carbon Dioxide/*metabolism
MH  - Fluorescence
MH  - Lupinus/enzymology/growth & development/metabolism/*physiology
MH  - Phosphorus/*metabolism
MH  - *Photosynthesis
MH  - Ribulose-Bisphosphate Carboxylase/metabolism
EDAT- 2006/11/08 09:00
MHDA- 2006/12/09 09:00
CRDT- 2006/11/08 09:00
PHST- 2006/11/08 09:00 [pubmed]
PHST- 2006/12/09 09:00 [medline]
PHST- 2006/11/08 09:00 [entrez]
AID - 10.1111/j.1365-3040.2005.01464.x [doi]
PST - ppublish
SO  - Plant Cell Environ. 2006 May;29(5):844-53. doi: 10.1111/j.1365-3040.2005.01464.x.