Differences between maize and rice in N-use effciency for photosynthesis and protein allocation

The N-use efficiency for photosynthesis was higher in a C4 plant, maize,than in a C3 plant,rice,including rbcS antisense rice with optimal ribulose-1,5-bisphosphate carboxylase (Rubisco) content for CO2-saturated photosynthesis,even when photosynthesis was measured under saturating CO2 conditions. T...

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Bibliographic Details
Published in:Plant and cell physiology 2003-09, Vol.44 (9)
Main Authors: Makino, A. (Tohoku Univ., Sendai (Japan)), Sakuma, H, Sudo, E, Mae, T
Format: Article
Language:English
Subjects:
C3 PLANTS
C4 PLANTS
NITROGEN METABOLISM
ORYZA SATIVA
PHOTOSYNTHESIS
RUBISCO
ZEA MAYS
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Summary:The N-use efficiency for photosynthesis was higher in a C4 plant, maize,than in a C3 plant,rice,including rbcS antisense rice with optimal ribulose-1,5-bisphosphate carboxylase (Rubisco) content for CO2-saturated photosynthesis,even when photosynthesis was measured under saturating CO2 conditions. The N cost for the C4 cycle enzymes in maize was not large, and the lower amount of Rubisco allowed a greater N investment in the thylakoid components. This greater content of the thylakoid components as well as the CO2 concentrating mechanism may support higher N-use efficiency for photosynthesis in maize.
ISSN:0032-0781
1471-9053