Photosynthetica 2009, 47(1):152-154 | DOI: 10.1007/s11099-009-0025-4

Photosynthetic acclimation to CO2 enrichment related to ribulose-1,5-bisphosphate carboxylation limitation in wheat

D. Y. Zhang1, G. Y. Chen1, J. Chen1, Z. H. Yong1, J. G. Zhu2, D. Q. Xu1,*
1 Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; Graduate School of the Chinese Academy of Sciences, Shanghai, China
2 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China

Net photosynthetic rate (P N) measured at the same CO2 concentration, the maximum in vivo carboxylation rate, and contents of ribulose-1,5-bisphosphate (RuBP) carboxylase/oxygenase (RuBPCO) and RuBPCO activase were significantly decreased, but the maximum in vivo electron transport rate and RuBP content had no significant change in CO2-enriched [EC, about 200 µmol mol-1 above the ambient CO2 concentration (AC)] wheat leaves compared with those in AC grown wheat leaves. Hence photosynthetic acclimation in wheat leaves to EC is largely due to RuBP carboxylation limitation.

Additional key words: maximum in vivo electron transport rate; net photosynthetic rate; ribulose-1,5-bisphosphate carboxylase, oxygenase activase; RuBP regeneration limitation; sucrose-phosphate synthase; Triticum

Received: January 10, 2008; Accepted: August 10, 2008; Published: March 1, 2009  Show citation

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Zhang, D.Y., Chen, G.Y., Chen, J., Yong, Z.H., Zhu, J.G., & Xu, D.Q. (2009). Photosynthetic acclimation to CO2 enrichment related to ribulose-1,5-bisphosphate carboxylation limitation in wheat. Photosynthetica, 47(1), 152-154. doi: 10.1007/s11099-009-0025-4
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