Intensive cycling of nickel in a New Caledonian forest dominated by hyperaccumulator trees - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Plant Journal Year : 2021

Intensive cycling of nickel in a New Caledonian forest dominated by hyperaccumulator trees

Abstract

The hyperaccumulator Pycnandra acuminata is a New Caledonian rainforest tree known to have the highest concentration of nickel in any living organism with 25 wt% in its latex. All trees (with diameter >10 cm) and soil profiles in a 0.25-hectare permanent plot were sampled to assess the biogeochemical compartmentalisation of nickel in a dense stand of Pycnandra acuminata trees. Nickel stable isotope analysis permitted insights into the cycling of nickel in this ecosystem. The total tree biomass of the plot was ~281 tonnes ha-1, approximately 0.44 kg of cobalt, 49.1 kg of manganese, 257 kg of nickel and 6.76 kg of zinc. Nickel stable isotope analysis identified the biotic origin of the nickel in the soil upper layers with P. acuminata shoots enriched in lighter nickel isotopes. The δ60Ni latex signature suggests that long-distance transport, radial xylem and phloem loading are at play in Pycnandra acuminata.

Dates and versions

hal-03255303 , version 1 (09-06-2021)

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Adrian L. D. Paul, Sandrine Isnard, Christine Wawryk, Peter D. Erskine, Guillaume Echevarria, et al.. Intensive cycling of nickel in a New Caledonian forest dominated by hyperaccumulator trees. Plant Journal, 2021, 107 (4), pp.1040-1055. ⟨10.1111/tpj.15362⟩. ⟨hal-03255303⟩
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