Skip Navigation



JXB Advance Access published online on July 1, 2003
Journal of Experimental Botany, doi:10.1093/jxb/erg194
© 2003 by Oxford University Press
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
54/389/1951    most recent
erg194v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
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 PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Hwangbo, J.-K.
Right arrow Articles by Woodin, S. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hwangbo, J.-K.
Right arrow Articles by Woodin, S. J.
Agricola
Right arrow Articles by Hwangbo, J.-K.
Right arrow Articles by Woodin, S. J.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Received April 10, 2003; accepted April 16, 2003
© 2003 Society for Experimental Biology

RESEARCH PAPER

Short-term exposure to elevated atmospheric CO2 benefits the growth of a facultative annual root hemiparasite, Rhinanthus minor (L.), more than that of its host, Poa pratensis (L.)

Jun-Kwon Hwangbo 1, Wendy E. Seel 1*, and Sarah J. Woodin 1

1 School of Biological Sciences, Department of Plant and Soil Science, University of Aberdeen, Aberdeen AB24 3UU, UK

* To whom correspondence should be addressed. E-mail: w.e.seel{at}abdn.ac.uk.


  Abstract

The effects of elevated CO2 (650 ppm) on interactions between a chlorophyllous parasitic angiosperm, Rhinanthus minor (L.) and a host, Poa pratensis (L.) were investigated. R. minor benefited from elevated CO2, with both photosynthesis and biomass increasing, and transpiration and tissue N concentration remaining unaffected. However, this did not alleviate the negative effect of the parasite on the host; R. minor reduced host photosynthesis, transpiration, leaf area and biomass, irrespective of CO2 concentration. Elevated CO2 resulted in increased host photosynthesis, but there was no concomitant increase in biomass and foliar N decreased. It appears that the parasite may reduce host growth more by competition for nitrogen than for carbon. Contrary to expectation, R. minor did not reduce the productivity of the host-parasite association, and it actually contributed to the stimulation of productivity of the association by elevated CO2.

Key words: Elevated CO2, nitrogen, parasitic angiosperm, photosynthesis, Poa pratensis, Rhinanthus minor.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.