@article{fdi:010057524,
  title = {{E}lemental concentrations of eleven {N}ew {C}aledonian plant species from serpentine soils : elemental correlations and leaf-age effects},
  author = {{B}oyd, {R}. {S}. and {J}affr{\'e}, {T}anguy},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigated accumulation of elements ({C}a, {C}o, {C}r, {C}u, {F}e, {K}, {M}g, {M}n, {P}, {P}b, and {Z}n) in leaves of different ages for 11 evergreen woody plant species from serpentine soils of {N}ew {C}aledonia. {S}pecies were classified into four categories of {N}i accumulation ability: one species was a non-accumulator (<100 mg {N}i/kg), three were accumulators (100-1000 mg {N}i/kg), two were hyperaccumulators (1000-10,000 mg {N}i/kg), and five were hypernickelophores (>10,000 mg {N}i/kg). {W}e harvested leaves from each species, separating them into three (four in one case) relative age categories based upon their position along branches (younger toward the apex, older far from it). {L}eaf samples were dried, ground, and dry-ashed, and their elemental concentrations were determined by inductively coupled plasma spectrometry (all elements except {N}i) or atomic absorption spectrophotometry ({N}i). {G}reat variation was found for most elements both within and among species, but {N}i varied most (1050-fold between species for oldest leaves). {C}orrelations between {N}i and other transition metals showed no significant relationships within samples of any species, but, we found significant positive correlations between {N}i and {P}b (correlation coefficient = 0.97) and {N}i and {F}e (correlation coefficient = 0.87) among species. {L}eaf {N}i concentrations varied significantly with leaf age for two species, the hypernickelophores {G}eissois pruinosa and {H}omalium kanaliense. {W}e conclude that {N}i concentration varies markedly between species, but generally does not vary with leaf age within species. {W}e also suggest that four {N}i accumulation category terms non-accumulator, hemi-accumulator, hyperaccumulator, and hypernickelophore-be used to subdivide the wide variation found in {N}i concentrations in plant leaves.},
  keywords = {},
  booktitle = {},
  journal = {{N}ortheastern {N}aturalist},
  volume = {16},
  numero = {{S}p. {I}ss. 5},
  pages = {93--110},
  ISSN = {1092-6194},
  year = {2009},
  DOI = {10.1656/045.016.0508},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057524},
}