@article{fdi:010085289,
  title = {{P}henotyping and modeling of root hydraulic architecture reveal critical determinants of axial water transport},
  author = {{B}oursiac, {Y}. and {P}radal, {C}. and {B}auget, {F}. and {L}ucas, {M}ika{\¨e}l and {D}elivorias, {S}. and {G}odin, {C}. and {M}aurel, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}ater uptake by roots is a key adaptation of plants to aerial life. {W}ater uptake depends on root system architecture ({RSA}) and tissue hydraulic properties that, together, shape the root hydraulic architecture. {T}his work investigates how the interplay between conductivities along radial (e.g. aquaporins) and axial (e.g. xylem vessels) pathways determines the water transport properties of highly branched {RSA}s as found in adult {A}rabidopsis ({A}rabidopsis thaliana) plants. {A} hydraulic model named {H}ydro{R}oot was developed, based on multi-scale tree graph representations of {RSA}s. {R}oot water flow was measured by the pressure chamber technique after successive cuts of a same root system from the tip toward the base. {H}ydro{R}oot model inversion in corresponding {RSA}s allowed us to concomitantly determine radial and axial conductivities, providing evidence that the latter is often overestimated by classical evaluation based on the {H}agen-{P}oiseuille law. {O}rganizing principles of {A}rabidopsis primary and lateral root growth and branching were determined and used to apply the {H}ydro{R}oot model to an extended set of simulated {RSA}s. {S}ensitivity analyses revealed that water transport can be co-limited by radial and axial conductances throughout the whole {RSA}. {T}he number of roots that can be sectioned (intercepted) at a given distance from the base was defined as an accessible and informative indicator of {RSA}. {T}he overall set of experimental and theoretical procedures was applied to plants mutated in {ESKIMO}1 and previously shown to have xylem collapse. {T}his approach will be instrumental to dissect the root water transport phenotype of plants with intricate alterations in root growth or transport functions. {A} model-assisted experimental dissection of architecture and water transport properties of {A}rabidopsis root systems reveals limiting roles of xylem transport.},
  keywords = {},
  booktitle = {},
  journal = {{P}lant {P}hysiology},
  volume = {[{E}arly acces]},
  numero = {},
  pages = {[18 p.]},
  ISSN = {0032-0889},
  year = {2022},
  DOI = {10.1093/plphys/kiac281},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085289},
}