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Diversity of leaf traits related to productivity in 31 Populus deltoides x Populus nigra clones

Abstract : To test if some leaf parameters are predictors of productivity in a range of Populus deltoides (Bartr.) Marsh. × P. nigra L. clones, we assessed leaf traits and productivity in 2-month-old rooted cuttings from 31 clones growing in 4-l pots in a greenhouse, under conditions of controlled temperature and optimal irrigation. We evaluated four groups of variables describing (1) productivity (total biomass), (2) leaf growth (total leaf number increment and total leaf area increment rate), (3) leaf structure (specific leaf area and nitrogen and carbon contents) and (4) carbon isotope discrimination (∆), which is negatively correlated with time-integrated water-use efficiency. High-yielding clones did not necessarily display high leaf growth rates, but they displayed a larger total leaf area, lower specific leaf area and lower leaf nitrogen concentration than clones with low productivity. Total leaf area was mainly controlled by maximal individual leaf area and total leaf area increment rate (r = 0.51 and 0.56, respectively). Carbon isotope discrimination did not correlate with total biomass, but it was associated with total number of leaves and total leaf area increment rate (r = 0.39 and 0.45, respectively). Therefore, leaf area and specific leaf area were better indicators of productivity than leaf growth traits. The observed independence of ∆ from biomass production provides opportunities for selecting poplar clones combining high productivity and high water-use efficiency.
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https://hal.inrae.fr/hal-02677486
Contributor : Migration Prodinra <>
Submitted on : Sunday, May 31, 2020 - 7:26:46 PM
Last modification on : Monday, November 30, 2020 - 6:54:02 AM

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  • HAL Id : hal-02677486, version 1
  • PRODINRA : 11538

Citation

Nicolas Marron, Marc Villar, Erwin Dreyer, Didier Delay, Jean-Michel Petit, et al.. Diversity of leaf traits related to productivity in 31 Populus deltoides x Populus nigra clones. Tree Physiology, Oxford University Press (OUP): Policy B - Oxford Open Option B, 2005, 25 (4), pp.425-435. ⟨hal-02677486⟩

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