Plant Physiology Preview
Published on December 5, 2002; 10.1104/pp.011098
Received July 10, 2002
Returned for revision July 30, 2002
Accepted August 22, 2002
Acclimation of Rice Photosynthesis to Irradiance under Field Conditions
Erik H. Murchie *, Stella Hubbart , Yizhu Chen , Shaobing Peng , and Peter Horton
Robert Hill Institute, Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom (E.H.M., S.H., P.H.); and Crop, Soil, and Water Sciences Division, International Rice Research Institute, P.O. Box 933, 1099 Manila, Philippines (Y.C., S.P.)
* Corresponding author; email: e.h.murchie{at}sheffield.ac.uk.
Acclimation to irradiance was measured in terms of light-saturated photosynthetic carbon assimilation rates (Pmax), Rubisco, and pigment content in mature field-grown rice (Oryza sativa) plants in tropical conditions. Measurements were made at different positions within the canopy alongside irradiance and daylight spectra. These data were compared with a second experiment in which acclimation to irradiance was assessed in uppermost leaves within whole-plant shading regimes (10% low light [LL], 40% medium light [ML], and 100% high light [HL] of full natural sunlight). Two varieties, japonica (tropical; new plant type [NPT]) and indica (IR72) were compared. Values for Rubisco amount, chlorophyll a/b, and Pmax all declined from the top to the base of the canopy. In the artificial shading experiment, acclimation of Pmax (measured at 350 µL L-1 CO2) occurred between LL and ML for IR72 with no difference observed between ML and HL. The Rubisco amount increased between ML and HL in IR72. A different pattern was seen for NPT with higher Pmax (measured at 350 µL L-1 CO2) at LL than IR72 and some acclimation of this parameter between ML and HL. Rubisco levels were higher in NPT than IR72 contrasting with Pmax. Comparison of data from both experiments suggests a leaf aging effect between the uppermost two leaf positions, which was not a result of irradiance acclimation. Results are discussed in terms of: (a) acclimation of photosynthesis and radiation use efficiency at high irradiance in rice, and (b) factors controlling photosynthetic rates of leaves within the canopy.
This article has been cited by other articles:
|
|
|
|
 
M. Frei, J. P. Tanaka, and M. Wissuwa
Genotypic variation in tolerance to elevated ozone in rice: dissection of distinct genetic factors linked to tolerance mechanisms
J. Exp. Bot.,
October 1, 2008;
59(13):
3741 - 3752.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
S. Hubbart, S. Peng, P. Horton, Y. Chen, and E. H. Murchie
Trends in leaf photosynthesis in historical rice varieties developed in the Philippines since 1966
J. Exp. Bot.,
September 17, 2007;
(2007)
erm192v1.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
P Priault, C Fresneau, G Noctor, R De Paepe, G Cornic, and P Streb
The mitochondrial CMSII mutation of Nicotiana sylvestris impairs adjustment of photosynthetic carbon assimilation to higher growth irradiance
J. Exp. Bot.,
June 1, 2006;
57(9):
2075 - 2085.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
P. M. Mullineaux, S. Karpinski, and N. R. Baker
Spatial Dependence for Hydrogen Peroxide-Directed Signaling in Light-Stressed Plants
Plant Physiology,
June 1, 2006;
141(2):
346 - 350.
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. H. Mehaffey, D. S. Fisher, and J. C. Burns
Photosynthesis and Nutritive Value in Leaves of Three Warm-Season Grasses before and after Defoliation
Agron. J.,
April 27, 2005;
97(3):
755 - 759.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R. G. Walters
Towards an understanding of photosynthetic acclimation
J. Exp. Bot.,
January 1, 2005;
56(411):
435 - 447.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
E. H. Murchie, S. Hubbart, S. Peng, and P. Horton
Acclimation of photosynthesis to high irradiance in rice: gene expression and interactions with leaf development
J. Exp. Bot.,
January 1, 2005;
56(411):
449 - 460.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
