@article{fdi:010090537,
  title = {{R}oot topological order drives variation of fine root vessel traits and hydraulic strategies in tropical trees},
  author = {{Z}hang, {G}. {Q}. and {F}ortunel, {C}laire and {N}iu, {S}. and {Z}uo, {J}. and {M}aeght, {J}ean-{L}uc and {Y}ang, {X}. {D}. and {X}ia, {S}. {W}. and {M}ao, {Z}.},
  editor = {},
  language = {{ENG}},
  abstract = {{V}essel traits contribute to plant water transport from roots to leaves and thereby influence how plants respond to soil water availability, but the sources of variation in fine root anatomical traits remain poorly understood. {H}ere, we explore the variations of fine root vessel traits along topological orders within and across tropical tree species. {A}natomical traits were measured along five root topological orders in 80 individual trees of 20 species from a tropical forest in southwestern {C}hina. {W}e found large variations for most root anatomical traits across topological orders, and strong co-variations between vessel traits. {W}ithin species, theoretical specific xylem hydraulic conductivity ({K}th) increased with topological order due to increased mean vessel diameter, size heterogeneity, and decreased vessel density. {A}cross species, {K}th was associated with vessel fraction in low-order roots and correlated with mean vessel diameter and vessel density in high-order roots, suggesting a shift in relative anatomical contributors to {K}th from the second- to fifth-order roots. {W}e found no clear relationship between {K}th and stele: root diameter ratios. {O}ur study shows strong variations in root vessel traits across topological orders and species, and highlights shifts in the anatomical underpinnings by varying vessel-related anatomical structures for an optimized water supply. {T}ropical trees of {C}hina showed large variations for most root anatomical traits across topological orders, and strong co-variations between vessel traits, providing new insights into water transport strategy in fine roots.},
  keywords = {{F}ine root ; hydraulic conductivity ; plant anatomy ; root order ; tropical ; trees ; vessel traits ; xylem},
  booktitle = {},
  journal = {{J}ournal of {E}xperimental {B}otany},
  volume = {75},
  numero = {10},
  pages = {2951--2964},
  ISSN = {0022-0957},
  year = {2024},
  DOI = {10.1093/jxb/erae083},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090537},
}