| Range |
maize (C4 plant) 6.7: rice (C3 plant) 5.9 mg CO2/mg N/hr
|
| Organism |
Plants |
| Reference |
Duursma EK, Boisson MPRM, Global oceanic and atmospheric oxygen stability considered in relation to the carbon-cycle and to different time scales. Oceanologica Acta (0399-1784) (Gauthier-Villars), 1994 , Vol. 17 , N. 2 , P. 117-141 link p.134 left column 2nd paragraph |
| Primary Source |
Schmitt M.R. and G.E. Edwards (1981). Photosynthetic capacity and nitrogen use efficiency of maize, wheat and rice: a comparison between C3 and C4 photosynthesis. J. expl Bot., 32, 459-466 link |
| Method |
Primary source abstract: "The C3 species wheat and rice and the C4 species maize were grown for 2–3 weeks in controlled environment growth chambers at 20 or 30 °C day and 15 °C night temperatures. CO2 assimilation rates (at 20 and 30 °C) and several leaf parameters including total nitrogen, soluble protein, and RuBP carboxylase protein were determined." |
| Comments |
P.134 left column 2nd paragraph: "A difference exists between C4 and C3 pathways concerning their photosynthetic efficiency as related to nitrogen nutrients. This efficiency is larger for C4 than for C3 plants. The C4 plant maize has, e. g., an efficiency of 6.7 mg CO2/mg N/hr, while that of the C3 plant rice is 5.9 mg CO2/mg N/hr, determined both at 20°C (primary source)." Primary source abstract: "When the assimilation rates under atmospheric CO2 and O2 levels were expressed on a total nitrogen basis (= nitrogen use efficiency), the C4 species maize had a greater nitrogen use efficiency than either of the two C3 species examined, regardless of the combination of temperatures used for growth or measurement of CO2 assimilation." |
| Entered by |
Uri M |
| ID |
116128 |