@article{fdi:010091109, title = {{I}n vivo imaging of nickel-rich laticifers : a breakthrough in metal hyperaccumulation}, author = {van der {E}nt, {A}. and {S}piers, {K}. {M}. and {J}affr{\'e}, {T}. and {B}rueckner, {D}. and {I}rvine, {S}. {C}. and {G}arrevoet, {J}. and {E}rskine, {P}. {D}. and {G}ei, {V}. and {M}ontarg{\`e}s-{P}elletier, {E}. and {F}ogliani, {B}. and {E}chevarria, {G}. and {I}snard, {S}andrine}, editor = {}, language = {{ENG}}, abstract = {{T}he discovery of the nickel-rich latex of the {N}ew {C}aledonian endemic tree {P}ycnandra acuminata introduced the term 'hyperaccumulator' and gave rise to a new field of research. {T}his then instigated a global quest for these unusual hyperaccumulator plants, even while the underlying mechanisms of nickel acquisition, transport, and internal elemental distribution remained unknown for this original laticifer-bearing hyperaccumulator plant. {H}ere we reveal for the first time the distribution of nickel-filled laticifers in the different plant organs of {P}. acuminata. . {T}he pressurised nickel laticifers were imaged multimodally with a combination of synchrotron {X}ray fluorescence ({XRF}) microscopy, microtomography ({XRF}-mu {CT}) and synchrotron {X}-ray phase contrast imaging microtomography ({PCI}-mu {CT}). {T}hese advanced synchrotron methodologies allowed for complimentary noninvasive reconstructions of an in-situ model of the laticiferous system in this species. {T}he data shows the distribution of the nickel-rich laticifers within whole plant tissues from roots to apical tip, thus suggesting nickel trafficking in the laticifer network. {T}he extraordinary concentration of nickel within {P}. acuminata laticifers functions as an effective natural tracer for {XRF}-mu {CT} and {PCI}-mu {CT} to probe the structure and organization of these cells, thereby permitting insights into the development and physiological functioning of this unique duct system.}, keywords = {{F}luorescence tomography ; {H}yperaccumulation ; {L}aticifers transport ; {N}ickel trafficking ; {PCI}-mu {CT} ; {P}ycnandra acuminata ; {XRF}-mu {CT} ; {X}-ray ; fluorescence ({XRF}) ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{E}nvironmental and {E}xperimental {B}otany}, volume = {226}, numero = {}, pages = {105877 [9 p.]}, ISSN = {0098-8472}, year = {2024}, DOI = {10.1016/j.envexpbot.2024.105877}, URL = {https://www.documentation.ird.fr/hor/fdi:010091109}, }