Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
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 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 (19)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Murchie, E. H.
Right arrow Articles by Peng, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Murchie, E. H.
Right arrow Articles by Peng, S.
Agricola
Right arrow Articles by Murchie, E. H.
Right arrow Articles by Peng, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Experimental Botany, Vol. 53, No. 378, pp. 2217-2224, November 1, 2002
© 2002 Oxford University Press

Are there associations between grain-filling rate and photosynthesis in the flag leaves of field-grown rice?

Received 12 March 2002; Accepted 18 June 2002

Erik H. Murchie3,1, Jianchang Yang4,2, Stella Hubbart1, Peter Horton1 and Shaobing Peng2

1 Robert Hill Institute, Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
2 Crop, Soil and Water Sciences Division, International Rice Research Institute, PO Box 933, 1099 Manila, Philippines

Abbreviations: {phi}PSII, quantum efficiency of photosystem II; Chl, chlorophyll; DAF, days after flowering; DW, dry weight; IRRI, International Rice Research Institute; LHCII, light harvesting complex of photosystem II; NPT, new plant type; PPFD, photosynthetic photon flux density; PSI, photosystem I; PSII, photosystem II; RGFP, rapid grain-filling phase; Rubisco, ribulose bisphosphate carboxylase-oxygenase; Pmax, light-saturated rate of net CO2 assimilation.

Rate of grain filling in terms of dry mass accumulated per panicle per day was measured in field-grown rice in the dry season in the Philippines and compared to rates of light-saturated photosynthesis per unit leaf area (Pmax) measured at 350 µl l–1 CO2 for 21 d after flowering. Five new plant type (tropical japonica) varieties (NPT) and one indica variety (IR72) were used and these gave some variation in rates and patterns of grain filling. A rapid grain-filling phase (RGFP) occurred approximately 10 d after flowering in most varieties. There was no consistent relationship in any variety between the rate of grain-filling and Pmax and chlorophyll content, both of which remained mostly unchanged throughout grain filling. Significant declines in the amount of total leaf protein and ribulose bisphosphate carboxylase-oxygenase (Rubisco) occurred, but these did not occur at the same time as the RGFP in all varieties. A decrease in the ratio of chlorophyll a/b preceded these changes and a transient rise in chlorophyll content was also observed in four varieties at this time. There was no significant change in leaf non-structural carbohydrate content during or following the RGFP. It is concluded that the decline in Rubisco and protein content in NPT was not reflected in photosynthetic activity. Hence in these field experiments Rubisco accumulated to a level in excess of photosynthetic requirements, serving as a store of nitrogen for grain filling.

Key words: Key words: Grain filling, leaf senescence, photosynthesis, rice, Rubisco.


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
 J Exp BotHome page
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]

Home page
 J Exp BotHome page
T. Takai, Y. Fukuta, T. Shiraiwa, and T. Horie
Time-related mapping of quantitative trait loci controlling grain-filling in rice (Oryza sativa L.)
J. Exp. Bot., August 1, 2005; 56(418): 2107 - 2118.
[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.