Reduced nitrogen allocation to expanding leaf blades suppresses ribulose-1,5-bisphosphate carboxylase/oxygenase synthesis and leads to photosynthetic acclimation to elevated CO2 in rice

Seneweera, S. (2011) Reduced nitrogen allocation to expanding leaf blades suppresses ribulose-1,5-bisphosphate carboxylase/oxygenase synthesis and leads to photosynthetic acclimation to elevated CO2 in rice. Photosynthetica, 49 (1). pp. 145-148. ISSN 0300-3604

Abstract

Net photosynthetic rate (PN) measured at elevated CO2 concentration (Ce), ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), and nitrogen (N) content in rice leaves decreased significantly after exposure to long term Ce. The reduction in PN, Rubisco, and leaf N at Ce was similar for the last fully expanded leaf blade (LFELB) and expanding leaf blade (ELB). Spatial leaf N content in the ELB was highest in the zone of cell division, sharply declined as cell expansion progressed and gradually increased with cell maturation. Maximum reduction in spatial leaf N and Rubisco content was found at Ce only within cell expansion and maturation zones. The spatial leaf N content correlated well with the amount of Rubisco synthesized during leaf expansion, suggesting that N deposition into the expanding leaf blade may be the key for Rubisco synthesis and possibly photosynthetic acclimation to Ce.


Statistics for USQ ePrint 25408
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2011 Springer Science+Business Media B.V. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 01 Jul 2014 23:42
Last Modified: 09 Feb 2017 05:12
Uncontrolled Keywords: elevated CO2; photosynthesis; ribulose-1,5-bisphosphate carboxylase/oxygenase; rice; spatial nitrogen deposition
Fields of Research : 06 Biological Sciences > 0601 Biochemistry and Cell Biology > 060103 Cell Development, Proliferation and Death
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070302 Agronomy
03 Chemical Sciences > 0305 Organic Chemistry > 030503 Organic Chemical Synthesis
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8204 Summer Grains and Oilseeds > 820402 Rice
Identification Number or DOI: 10.1007/s11099-011-0006-2
URI: http://eprints.usq.edu.au/id/eprint/25408

Actions (login required)

View Item Archive Repository Staff Only