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Differential CO2 effect on primary carbon metabolism of flag leaves in durum wheat (Triticum durum Desf.)
- Source :
- Plant, Cell and Environment, Plant, Cell and Environment, Wiley, 2015, 38 (12), pp.2780-2794. ⟨10.1111/pce.12587⟩, Plant, Cell and Environment, 2015, 38 (12), pp.2780-2794. ⟨10.1111/pce.12587⟩
- Publication Year :
- 2015
- Publisher :
- HAL CCSD, 2015.
-
Abstract
- International audience; C sink/source balance and N assimilation have been identified as target processes conditioning crop responsiveness to elevated CO2 . However, little is known about phenology-driven modifications of C and N primary metabolism at elevated CO2 in cereals such as wheat. Here, we examined the differential effect of elevated CO2 at two development stages (onset of flowering, onset of grain filling) in durum wheat (Triticum durum, var. Sula) using physiological measurements (photosynthesis, isotopes), metabolomics, proteomics and (15) N labelling. Our results show that growth at elevated CO2 was accompanied by photosynthetic acclimation through a lower internal (mesophyll) conductance but no significant effect on Rubisco content, maximal carboxylation or electron transfer. Growth at elevated CO2 altered photosynthate export and tended to accelerate leaf N remobilization, which was visible for several proteins and amino acids, as well as lysine degradation metabolism. However, grain biomass produced at elevated CO2 was larger and less N rich, suggesting that nitrogen use efficiency rather than photosynthesis is an important target for improvement, even in good CO2 -responsive cultivars.
- Subjects :
- cereal
carbon primary metabolism
Nitrogen
5-bisphosphate carboxylase
Acclimatization
Ribulose-Bisphosphate Carboxylase
ribulose-1
plant
acclimation
Electron Transport
carboxylation
proteomics
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology
leaf metabolism
Triticum
photosynthesis
biomass
Lysine
grain yield
food and beverages
nitrogen assimilation
Carbon Dioxide
metabolomics
Carbon
Plant Leaves
climate change
Triticum durum
rubisco
Edible Grain
carbon dioxide elevation
Subjects
Details
- Language :
- English
- ISSN :
- 01407791 and 13653040
- Database :
- OpenAIRE
- Journal :
- Plant, Cell and Environment, Plant, Cell and Environment, Wiley, 2015, 38 (12), pp.2780-2794. ⟨10.1111/pce.12587⟩, Plant, Cell and Environment, 2015, 38 (12), pp.2780-2794. ⟨10.1111/pce.12587⟩
- Accession number :
- edsair.pmid.dedup....ca791c46388ed160ce3b99e90c6f8d0b