Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Content Snapshot
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 ISI Web of Science
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 arrow Search for citing articles in:
ISI Web of Science (17)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by HAUPT-HERTING, S.
Right arrow Articles by FOCK, H. P.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by HAUPT-HERTING, S.
Right arrow Articles by FOCK, H. P.
Agricola
Right arrow Articles by HAUPT-HERTING, S.
Right arrow Articles by FOCK, H. P.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 89: 851-859, 2002
© 2002 Annals of Botany Company

Oxygen Exchange in Relation to Carbon Assimilation in Water-stressed Leaves During Photosynthesis

SILKE HAUPT-HERTING1 and HEINRICH P. FOCK*,1

1Department of Biology, University of Kaiserslautern, PO Box 3049, D-67653 Kaiserslautern, Germany

* For correspondence. Fax +49 631 205 2600, e-mail fock{at}rhrk.uni-kl.de

Received: 1 June 2001; Returned for revision: 10 September 2001; Accepted: 17 October 2001.

In a study on metabolic consumption of photosynthetic electrons and dissipation of excess light energy under water stress, O2 and CO2 gas exchange was measured by mass spectrometry in tomato plants using 18O2 and 13CO2. Under water stress, gross O2 evolution (EO), gross O2 uptake (UO), net CO2 uptake (PN), gross CO2 uptake (TPS), and gross CO2 evolution (EC) declined. The ratio PN/EO fell during stress, while the ratios UO/EO and EC/TPS rose. Mitochondrial respiration in the light, which can be measured directly by 12CO2 evolution during 13CO2 uptake at 3000 µl l–1 13CO2, is small in relation to gross CO2 evolution and CO2 release from the glycolate pathway. It is concluded that PSII, the Calvin cycle and mitochondrial respiration are down-regulated under water stress. The percentages of photosynthetic electrons dissipated by CO2 assimilation, photorespiration and the Mehler reaction were calculated: in control leaves more than 50 % of the electrons were consumed in CO2 assimilation, 23 % in photorespiration and 13 % in the Mehler reaction. Under severe stress the percentages of electrons dissipated by CO2 assimilation and the Mehler reaction declined while the percentage of electrons used in photorespiration doubled. The consumption of electrons in photorespiration may reduce the likelihood of damage during water deficit.

Key words: Lycopersicon esculentum, tomato, high-pigment mutant, water stress, oxygen exchange, CO2 assimilation, photorespiration, mitochondrial respiration in the light, Mehler reaction, mass spectrometry.


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


This article has been cited by other articles:


Home page
 ANN BOT (LOND)Home page
O. Ghannoum
C4 photosynthesis and water stress
Ann. Bot., February 1, 2009; 103(4): 635 - 644.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
O. K. Atkin and D. Macherel
The crucial role of plant mitochondria in orchestrating drought tolerance
Ann. Bot., February 1, 2009; 103(4): 581 - 597.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
D. W. Lawlor and W. Tezara
Causes of decreased photosynthetic rate and metabolic capacity in water-deficient leaf cells: a critical evaluation of mechanisms and integration of processes
Ann. Bot., February 1, 2009; 103(4): 561 - 579.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
S. Park, J. Li, J. K. Pittman, G. A. Berkowitz, H. Yang, S. Undurraga, J. Morris, K. D. Hirschi, and R. A. Gaxiola
Up-regulation of a H+-pyrophosphatase (H+-PPase) as a strategy to engineer drought-resistant crop plants
PNAS, December 27, 2005; 102(52): 18830 - 18835.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
H. GRIFFITHS and M. A. J. PARRY
Plant Responses to Water Stress
Ann. Bot., June 15, 2002; 89(7): 801 - 802.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
D. W. LAWLOR
Limitation to Photosynthesis in Water-stressed Leaves: Stomata vs. Metabolism and the Role of ATP
Ann. Bot., June 15, 2002; 89(7): 871 - 885.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
M. M. CHAVES, J. S. PEREIRA, J. MAROCO, M. L. RODRIGUES, C. P. P. RICARDO, M. L. OSORIO, I. CARVALHO, T. FARIA, and C. PINHEIRO
How Plants Cope with Water Stress in the Field? Photosynthesis and Growth
Ann. Bot., June 15, 2002; 89(7): 907 - 916.
[Abstract] [Full Text] [PDF]


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.