Plant Physiol. Illumina
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (47)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Osborne, C. P.
Right arrow Articles by Long, S. P.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Osborne, C. P.
Right arrow Articles by Long, S. P.
Agricola
Right arrow Articles by Osborne, C. P.
Right arrow Articles by Long, S. P.

Does Leaf Position within a Canopy Affect Acclimation of Photosynthesis to Elevated CO2?1
Analysis of a Wheat Crop under Free-Air CO2 Enrichment

Colin P. Osborne2, Julie La Roche, Richard L. Garcia3, Bruce A. Kimball, Gerard W. Wall, Paul J. Pinter Jr., Robert L. La Morte, George R. Hendrey, and Steve P. Long*

John Tabor Laboratories, Department of Biological Sciences, University of Essex, Colchester, CO4 3SQ, United Kingdom (C.P.O., S.P.L.); Environmental Biology and Instrumentation Division, Building 318, Brookhaven National Laboratory, Upton, New York 11973 (J.L.R., G.R.H., S.P.L.); and United States Department of Agriculture, Agricultural Research Service, Water Conservation Laboratory, 4331 East Broadway, Phoenix, Arizona 85040 (R.L.G., B.A.K., G.W.W., P.J.P., R.L.L.M.)

Previous studies of photosynthetic acclimation to elevated CO2 have focused on the most recently expanded, sunlit leaves in the canopy. We examined acclimation in a vertical profile of leaves through a canopy of wheat (Triticum aestivum L.). The crop was grown at an elevated CO2 partial pressure of 55 Pa within a replicated field experiment using free-air CO2 enrichment. Gas exchange was used to estimate in vivo carboxylation capacity and the maximum rate of ribulose-1,5-bisphosphate-limited photosynthesis. Net photosynthetic CO2 uptake was measured for leaves in situ within the canopy. Leaf contents of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), light-harvesting-complex (LHC) proteins, and total N were determined. Elevated CO2 did not affect carboxylation capacity in the most recently expanded leaves but led to a decrease in lower, shaded leaves during grain development. Despite this acclimation, in situ photosynthetic CO2 uptake remained higher under elevated CO2. Acclimation at elevated CO2 was accompanied by decreases in both Rubisco and total leaf N contents and an increase in LHC content. Elevated CO2 led to a larger increase in LHC/Rubisco in lower canopy leaves than in the uppermost leaf. Acclimation of leaf photosynthesis to elevated CO2 therefore depended on both vertical position within the canopy and the developmental stage.

1   This work was supported by a studentship to C.P.O. from the Natural Environment Research Council of the United Kingdom, the Carbon Dioxide Research Program of the Office of Health and Environmental Research of the U.S. Department of Energy, and by the U.S. Department of Agriculture, Agricultural Research Service.
2   Present address: Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK.
3   Present address: Li-Cor, Inc., P.O. Box 4425, Lincoln, NE 68504.
*   Corresponding author; e-mail stevel{at}essex.ac.uk; fax 44-1206-873416.

Plant Physiol. (1998) 117: 1037-1045
Copyright Clearance Center:   0032-0889/98/117/1037/09
© 1998 American Society of Plant Physiologists




This article has been cited by other articles:


Home page
 J Exp BotHome page
H. Shimono, M. Okada, Y. Yamakawa, H. Nakamura, K. Kobayashi, and T. Hasegawa
Genotypic variation in rice yield enhancement by elevated CO2 relates to growth before heading, and not to maturity group
J. Exp. Bot., February 1, 2009; 60(2): 523 - 532.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
E. A. Ainsworth, A. Rogers, A. D. B. Leakey, L. E. Heady, Y. Gibon, M. Stitt, and U. Schurr
Does elevated atmospheric [CO2] alter diurnal C uptake and the balance of C and N metabolites in growing and fully expanded soybean leaves?
J. Exp. Bot., February 1, 2007; 58(3): 579 - 591.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
Y. Onoda, K. Hikosaka, and T. Hirose
Seasonal change in the balance between capacities of RuBP carboxylation and RuBP regeneration affects CO2 response of photosynthesis in Polygonum cuspidatum
J. Exp. Bot., February 1, 2005; 56(412): 755 - 763.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
C. P. Osborne and D. J. Beerling
The Penalty of a Long, Hot Summer. Photosynthetic Acclimation to High CO2 and Continuous Light in "Living Fossil" Conifers
Plant Physiology, October 1, 2003; 133(2): 803 - 812.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
D. J. BEERLING and C. P. OSBORNE
Physiological Ecology of Mesozoic Polar Forests in a High CO2 Environment
Ann. Bot., March 1, 2002; 89(3): 329 - 339.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
A. Makino, H. Nakano, T. Mae, T. Shimada, and N. Yamamoto
Photosynthesis, plant growth and N allocation in transgenic rice plants with decreased Rubisco under CO2 enrichment
J. Exp. Bot., February 1, 2000; 51(90001): 383 - 389.
[Abstract] [Full Text]

Home page
 J Exp BotHome page
R.A.C. Mitchell, J.C. Theobald, M.A.J. Parry, and D.W. Lawlor
Is there scope for improving balance between RuBP-regeneration and carboxylation capacities in wheat at elevated CO2?
J. Exp. Bot., February 1, 2000; 51(90001): 391 - 397.
[Abstract] [Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1998 by the American Society of Plant Biologists