Differences between maize and rice in N-use effciency for photosynthesis and protein allocation
2003
Makino, A. (Tohoku Univ., Sendai (Japan)) | Sakuma, H. | Sudo, E. | Mae, T.
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.
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