Carbon isotope compositions (δ(13) C) of leaf, wood and holocellulose differ among genotypes of poplar and between previous land uses in a short-rotation biomass plantation

Autor: Verlinden, Melanie S, Fichot, Régis, Broeckx, Laura S, Vanholme, Bartel, Boerjan, Wout, Ceulemans, Reinhart
Přispěvatelé: Department of Biology, Research Group of Plant and Vegetation Ecology, University of Antwerp (UA), Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Institut National de la Recherche Agronomique (INRA)-Université d'Orléans (UO), Department of plant systems biology, Flanders Institute for Biotechnology, Department of plant Biotechnology and Bioinformatics, University of Gent
Rok vydání: 2013
Předmět:
Zdroj: Plant, Cell and Environment
Plant, Cell and Environment, Wiley, 2015, 38 (1), pp.144-156. ⟨10.1111/pce.12383⟩
ISSN: 1365-3040
0140-7791
DOI: 10.1111/pce.12383⟩
Popis: International audience; The efficiency of water use to produce biomass is a key trait in designing sustainable bioenergy-devoted systems. We characterized variations in the carbon isotope composition (δ(13) C) of leaves, current year wood and holocellulose (as proxies for water use efficiency, WUE) among six poplar genotypes in a short-rotation plantation. Values of δ(13) Cwood and δ(13) Cholocellulose were tightly and positively correlated, but the offset varied significantly among genotypes (0.79-1.01‰). Leaf phenology was strongly correlated with δ(13) C, and genotypes with a longer growing season showed a higher WUE. In contrast, traits related to growth and carbon uptake were poorly linked to δ(13) C. Trees growing on former pasture with higher N-availability displayed higher δ(13) C as compared with trees growing on former cropland. The positive relationships between δ(13) Cleaf and leaf N suggested that spatial variations in WUE over the plantation were mainly driven by an N-related effect on photosynthetic capacities. The very coherent genotype ranking obtained with δ(13) C in the different tree compartments has some practical outreach. Because WUE remains largely uncoupled from growth in poplar plantations, there is potential to identify genotypes with satisfactory growth and higher WUE.
Databáze: OpenAIRE
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