@article{fdi:010035715,
  title = {{S}patio-temporal variations in axial conductance of primary and first-order lateral roots of a maize crop as predicted by a model of the hydraulic architecture of root systems},
  author = {{P}ierret, {A}lain and {D}oussan, {C}. and {P}ages, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ates at which water can be transported along plant roots (axial pathway) vary through time, in part depending on xylem maturation. {B}ecause of experimental constraints, the dynamics of root functional heterogeneity under field conditions remains mostly uncharted territory. {R}ecent advances in mechanistic modelling offer opportunities to bypass such experimental limitations. {T}his paper examines the dynamics of local variations in axial conductance of primary and first-order lateral roots of a maize crop using the architecture-based modelling approach developed by {D}oussan et al. ({A}nnals of {B}otany: 81, 213-223, 1998). {S}pecifically, we hypothesised that points of major resistance to long distance water transfers could arise from discrepancies between the hydraulic maturity (or water carrying capacity) of main axes and branch roots. {T}o test this assumption, spatial distributions of root axial conductance were tested after 30, 60 and 100 days at soil depths of 10, 50 and 100 cm under a maize ({Z}ea mays {L}.) crop sown at a density of 8 plants m(-2). {A}s the crop developed, the corresponding root populations encompassed ever increasing amounts of hydraulically mature first-order laterals (branch roots): after a 100-day growth period, the vast majority of laterals had reached their maximum axial conductance at all soil depths down to 100 cm. {I}n contrast, the axial conductance of a large proportion of main axes (primary roots) remained low, even at shallow soil depths and after 100 days of growth. {T}he imbalance between the hydraulic maturity of primary and lateral roots was most conspicuous at soil depths of 100 cm, where similar to 10% only of the former compared to similar to 80% of the latter, had reached their maximum axial conductance after a 100-day growth period.},
  keywords = {3{D} modelling ; hydraulic conductance ; root architecture ; water uptake ; xylem},
  booktitle = {},
  journal = {{P}lant and {S}oil},
  volume = {282},
  numero = {1-2},
  pages = {117--126},
  ISSN = {0032-079{X}},
  year = {2006},
  DOI = {10.1007/s11104-005-5373-7},
  URL = {https://www.documentation.ird.fr/hor/fdi:010035715},
}