Document Detail

Sensitivity of plants to changing atmospheric CO(2) concentration: from the geological past to the next century.
MedLine Citation:
PMID:  23346950     Owner:  NLM     Status:  Publisher    
1 I. 2 II. 2 III. 4 IV. 5 V. 7 VI. 11 VII. 12 13 References 13 SUMMARY: The rate of CO(2) assimilation by plants is directly influenced by the concentration of CO(2) in the atmosphere, c(a) . As an environmental variable, c(a) also has a unique global and historic significance. Although relatively stable and uniform in the short term, global c(a) has varied substantially on the timescale of thousands to millions of years, and currently is increasing at seemingly an unprecedented rate. This may exert profound impacts on both climate and plant function. Here we utilise extensive datasets and models to develop an integrated, multi-scale assessment of the impact of changing c(a) on plant carbon dioxide uptake and water use. We find that, overall, the sensitivity of plants to rising or falling c(a) is qualitatively similar across all scales considered. It is characterised by an adaptive feedback response that tends to maintain 1 - c(i) /c(a) , the relative gradient for CO(2) diffusion into the leaf, relatively constant. This is achieved through predictable adjustments to stomatal anatomy and chloroplast biochemistry. Importantly, the long-term response to changing c(a) can be described by simple equations rooted in the formulation of more commonly studied short-term responses.
Peter J Franks; Mark A Adams; Jeffrey S Amthor; Margaret M Barbour; Joseph A Berry; David S Ellsworth; Graham D Farquhar; Oula Ghannoum; Jon Lloyd; Nate McDowell; Richard J Norby; David T Tissue; Susanne von Caemmerer
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-25
Journal Detail:
Title:  The New phytologist     Volume:  -     ISSN:  1469-8137     ISO Abbreviation:  New Phytol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882884     Medline TA:  New Phytol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 The Author. New Phytologist © 2012 New Phytologist Trust.
Faculty of Agriculture and Environment, University of Sydney, Sydney, NSW, 2006, Australia.
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