Plant Physiology Preview
Published on January 11, 2006; 10.1104/pp.105.073676
Received November 1, 2005
Returned for revision November 14, 2005
Accepted November 20, 2005
Evidence for involvement of photosynthetic processes in the stomatal response to CO2
Susanna M. Messinger , Thomas N. Buckley , and Keith A. Mott *
Biology Department, Utah State University, Logan, UT 84322-5305, United States
Environmental Biology Group and Cooperative Research Centre for Greenhouse Accounting, Research School of Biological Sciences, The Australian National University, GPO Box 475, Canberra, ACT 2601, Australia
* Corresponding author; email: kmott{at}biology.usu.edu.
Stomatal conductance (gs) typically declines in response to increasing intercellular CO2 concentration (ci). However, the mechanisms underlying this response are not fully understood. Recent work suggests the stomatal responses to ci and red light (RL) are linked to photosynthetic electron transport. We investigated the role of photosynthetic electron transport in the stomatal response to ci in intact leaves of cocklebur (Xanthium strumarium L.) plants, by examining the responses of gs and net CO2 assimilation rate (A) to ci in light and darkness, in the presence and absence of the PSII inhibitor DCMU, and at 2% and 21% ambient oxygen. Our results indicate that (a) gs and A decline concurrently, and with similar spatial patterns, in response to DCMU, (b) the response of gs to ci changes slope in concert with the transition from Rubisco- to electron transport-limited photosynthesis at various irradiances and oxygen concentrations, (c) the response of gs to ci is similar in darkness and in DCMU-treated leaves, whereas the response in light in non-DCMU-treated leaves is much larger and has a different shape, (d) the response of gs to ci is insensitive to oxygen in DCMU-treated leaves or in darkness, and (e) stomata respond normally to RL when ci is held constant, indicating the RL response does not require a reduction in ci by mesophyll photosynthesis. Together, these results suggest that part of the stomatal response to ci involves the balance between photosynthetic electron transport and carbon reduction, either in the mesophyll or in guard cell chloroplasts.
This article has been cited by other articles:
|
|
|
|
 
D. Vrabl, M. Vaskova, M. Hronkova, J. Flexas, and J. Santrucek
Mesophyll conductance to CO2 transport estimated by two independent methods: effect of variable CO2 concentration and abscisic acid
J. Exp. Bot.,
May 11, 2009;
(2009)
erp115v1.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. Monti, G. Bezzi, and G. Venturi
Internal conductance under different light conditions along the plant profile of Ethiopian mustard (Brassica carinata A. Brown.)
J. Exp. Bot.,
May 1, 2009;
60(8):
2341 - 2350.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
T. Lawson, S. Lefebvre, N. R. Baker, J. I. L. Morison, and C. A. Raines
Reductions in mesophyll and guard cell photosynthesis impact on the control of stomatal responses to light and CO2
J. Exp. Bot.,
October 1, 2008;
59(13):
3609 - 3619.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Doi and K.-i. Shimazaki
The Stomata of the Fern Adiantum capillus-veneris Do Not Respond to CO2 in the Dark and Open by Photosynthesis in Guard Cells
Plant Physiology,
June 1, 2008;
147(2):
922 - 930.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J.I.L Morison, N.R Baker, P.M Mullineaux, and W.J Davies
Improving water use in crop production
Phil Trans R Soc B,
February 12, 2008;
363(1491):
639 - 658.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
C. R. Warren
Soil water deficits decrease the internal conductance to CO2 transfer but atmospheric water deficits do not
J. Exp. Bot.,
February 1, 2008;
59(2):
327 - 334.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
I. Baroli, G. D. Price, M. R. Badger, and S. von Caemmerer
The Contribution of Photosynthesis to the Red Light Response of Stomatal Conductance
Plant Physiology,
February 1, 2008;
146(2):
737 - 747.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. Tcherkez, R. Bligny, E. Gout, A. Mahe, M. Hodges, and G. Cornic
Respiratory metabolism of illuminated leaves depends on CO2 and O2 conditions
PNAS,
January 15, 2008;
105(2):
797 - 802.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R. Zweifel, K. Steppe, and F. J. Sterck
Stomatal regulation by microclimate and tree water relations: interpreting ecophysiological field data with a hydraulic plant model
J. Exp. Bot.,
June 1, 2007;
58(8):
2113 - 2131.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
L. Chaerle, I. Leinonen, H. G. Jones, and D. Van Der Straeten
Monitoring and screening plant populations with combined thermal and chlorophyll fluorescence imaging
J. Exp. Bot.,
March 1, 2007;
58(4):
773 - 784.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
L. Chaerle, M. Pineda, R. Romero-Aranda, D. Van Der Straeten, and M. Baron
Robotized Thermal and Chlorophyll Fluorescence Imaging of Pepper Mild Mottle Virus Infection in Nicotiana benthamiana
Plant Cell Physiol.,
September 1, 2006;
47(9):
1323 - 1336.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
