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

Author:
Zhang, D.-Y., Chen, G.-Y., Chen, J., Yong, Z.-H., Zhu, J.-G., Xu, D.-Q.
Source:
Photosynthetica 2009 v.47 no.1 pp. 152-154
ISSN:
0300-3604
Subject:
Triticum aestivum, acclimation, carbon dioxide, carbon dioxide enrichment, carboxylation, electron transfer, leaves, photosynthesis, wheat
Abstract:
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.
Agid:
2217186