Acclimation to high CO2 in maize is related to water status and dependent on leaf rank

Prins, Anneke, Mukubi, Josephine Muchwesi, Pellny, Till K., Verrier, Paul J., Beyene, Getu, Lopes, Marta Silva, Emami, Kaveh, Treumann, Achim, Lelarge-Trouverie, Caroline, Noctor, Graham, Kunert, Karl J., Kerchev, Pavel and Foyer, Christine H. (2011) Acclimation to high CO2 in maize is related to water status and dependent on leaf rank. Plant, Cell & Environment, 34 (2) . pp. 314-331. ISSN 0140-7791 [Article] (doi:10.1111/j.1365-3040.2010.02245.x)


The responses of C(3) plants to rising atmospheric CO(2) levels are considered to be largely dependent on effects exerted through altered photosynthesis. In contrast, the nature of the responses of C(4) plants to high CO(2) remains controversial because of the absence of CO(2) -dependent effects on photosynthesis. In this study, the effects of atmospheric CO(2) availability on the transcriptome, proteome and metabolome profiles of two ranks of source leaves in maize (Zea mays L.) were studied in plants grown under ambient CO(2) conditions (350 +/- 20 µL L(-1) CO(2) ) or with CO(2) enrichment (700 +/- 20 µL L(-1) CO(2) ). Growth at high CO(2) had no effect on photosynthesis, photorespiration, leaf C/N ratios or anthocyanin contents. However, leaf transpiration rates, carbohydrate metabolism and protein carbonyl accumulation were altered at high CO(2) in a leaf-rank specific manner. Although no significant CO(2) -dependent changes in the leaf transcriptome were observed, qPCR analysis revealed that the abundance of transcripts encoding a Bowman-Birk protease inhibitor and a serpin were changed by the growth CO(2) level in a leaf rank specific manner. Moreover, CO(2) -dependent changes in the leaf proteome were most evident in the oldest source leaves. Small changes in water status may be responsible for the observed responses to high CO(2,) particularly in the older leaf ranks.

Item Type: Article
Additional Information: First published: 15 December 2010
Research Areas: A. > School of Science and Technology
Item ID: 18830
Depositing User: Anneke Prins
Date Deposited: 08 Feb 2016 11:56
Last Modified: 13 Oct 2016 14:38

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